v3.16.0

The old implementation of String matchers worked by making a, potentially
lower-cased, copy of both the constructor arg, and the arg to `match` calls.

The new implementation does not make copies, and instead does per-character
lowering if needed. This is a win in **most** cases, with two exceptions:

1) Case-insensitive `Equals` between long strings. The old implementation
   is easy to autovectorize by the compiler, which wins over the extra copy
   with sufficiently long inputs.
2) Case-insensitive `ContainsSubstring` with inputs that trigger the worst
   case complexity of O(m*n) of the naive implementation.

The latter is fixable with some elbow grease by implementing a proper
string search algorithm, but the former is a cost we have to live with.

CMakeLists.txt

@@ -35,7 +35,7 @@ if(CMAKE_BINARY_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
 endif()
 
 project(Catch2
-  VERSION 3.15.1 # CML version placeholder, don't delete
+  VERSION 3.16.0 # CML version placeholder, don't delete
   LANGUAGES CXX
   HOMEPAGE_URL "https://github.com/catchorg/Catch2"
   DESCRIPTION "A modern, C++-native, unit test framework."

benchmarks/discover_tests/benchmark_discovery.py

@@ -0,0 +1,206 @@
+#!/usr/bin/env python3
+
+#              Copyright Catch2 Authors
+# Distributed under the Boost Software License, Version 1.0.
+#   (See accompanying file LICENSE.txt or copy at
+#        https://www.boost.org/LICENSE_1_0.txt)
+
+# SPDX-License-Identifier: BSL-1.0
+
+import argparse
+import copy
+import json
+import os
+import re
+import statistics
+import subprocess
+import sys
+import tempfile
+import time
+
+HERE = os.path.dirname(os.path.abspath(__file__))
+TEMPLATE = os.path.join(HERE, "listing_template.json")
+SHIM = os.path.join(HERE, "copy_shim.cmake")
+COUNTS = [1, 10, 500, 1000, 2000, 4000, 8000, 16000]
+#COUNTS = [1, 10, 100]
+REPEATS = 5
+
+def load_template(path: str) -> dict:
+    with open(path, encoding="utf-8") as f:
+        catch_out = json.load(f)
+    if 'listings' not in catch_out or 'tests' not in catch_out['listings']:
+        sys.exit(f"Template '{path}' does not contain the expected 'listings.tests' data")
+
+    return catch_out
+
+
+def synthesize_listing(template_doc: dict, count: int, file, with_tags: bool) -> str:
+    """Writes JSON listing with exactly `count` test cases into `file`.
+
+    The template entries are cycled through, and each name is made unique by
+    appending an index, so that every registered CTest test has a distinct name.
+    """
+    # To avoid messing up the template tests by deletion, we have
+    # to take a deepcopy before the changes.
+    doc_copy = copy.deepcopy(template_doc)
+    template_tests = doc_copy['listings']['tests']
+    if not with_tags:
+        for test in template_tests:
+            del test['tags']
+    num_original = len(template_tests)
+
+    out_tests = []
+    for i in range(count):
+        entry = template_tests[i % num_original].copy()
+        entry["name"] = f"{entry['name']} #{i // num_original}"
+        out_tests.append(entry)
+
+    doc_copy['listings']['tests'] = out_tests
+
+    # indent=2 matches Catch2's pretty printing
+    json.dump(doc_copy, file, indent=2)
+    file.write('\n')
+
+
+def build_command(args, listing_path: str, ctest_file: str, add_tags: bool) -> list[str]:
+    # The executor needs to be a CMake list, so it has to be separated by ';'
+    executor = ";".join(['cmake', f"-DBENCH_LISTING={listing_path}", "-P", SHIM, "--"])
+    return [
+        'cmake',
+        "-DTEST_TARGET=benchmark",
+        f"-DTEST_EXECUTABLE={listing_path}",
+        f"-DTEST_EXECUTOR={executor}",
+        f"-DTEST_WORKING_DIR={os.path.dirname(ctest_file)}",
+        f"-DCTEST_FILE={ctest_file}",
+        f"-DADD_TAGS_AS_LABELS={'TRUE' if add_tags else 'FALSE'}",
+        "-P",
+        args.script,
+    ]
+
+
+def run_once(cmd: list[str]) -> float:
+    start = time.monotonic()
+    result = subprocess.run(cmd, capture_output=True, text=True)
+    elapsed = time.monotonic() - start
+    if result.returncode != 0:
+        sys.stderr.write("Benchmark invocation failed:\n")
+        sys.stderr.write(f"  cmd: {' '.join(cmd)}\n")
+        sys.stderr.write(f"  stdout: {result.stdout}\n")
+        sys.stderr.write(f"  stderr: {result.stderr}\n")
+        sys.exit(1)
+    return elapsed
+
+
+def verify_output(ctest_file: str, count: int, add_tags: bool):
+    """Sanity-check the generated CTest script and return its add_test count."""
+    with open(ctest_file, encoding="utf-8") as f:
+        content = f.read()
+    add_test_lines = sum(1 for line in content.splitlines() if line.startswith("add_test("))
+    if add_test_lines != count:
+        sys.exit(
+            f"Sanity check failed: expected {count} add_test() lines, "
+            f"found {add_test_lines} in {ctest_file}"
+        )
+    if add_tags and count > 0 and "LABELS" not in content:
+        sys.exit(
+            f"Sanity check failed: ADD_TAGS_AS_LABELS was on but no LABELS found "
+            f"in {ctest_file}"
+        )
+
+
+def cmake_version() -> str:
+    stdout = subprocess.run(
+        ['cmake', "--version"], capture_output=True, text=True, check=True
+    ).stdout
+    match = re.match("cmake version (.+)", stdout)
+    return match.group(1)
+
+
+def print_table(counts, tag_modes, results):
+    timing_by_ct = {(count, tags): median_time for (count, tags, median_time) in results}
+
+    headers = ["N"]
+    if False in tag_modes:
+        headers.append("tags:off")
+    if True in tag_modes:
+        headers.append("tags:on")
+
+    def fmt_cell(count, tags_on):
+        median_time = timing_by_ct[(count, tags_on)]
+        return f"{median_time:8.1f} ms"
+
+    # Header
+    row = f"{headers[0]:>6}"
+    if False in tag_modes:
+        row += f"  {headers[1]:>14}"
+    if True in tag_modes:
+        row += f"  {headers[2]:>14}"
+ 
+    print()
+    print("-" * len(row))
+    print(row)
+    print("-" * len(row))
+
+    for count in counts:
+        row = f"{count:>6}"
+        if False in tag_modes:
+            row += f"  {fmt_cell(count, False):>14}"
+        if True in tag_modes:
+            row += f"  {fmt_cell(count, True):>14}"
+        print(row)
+
+
+def main():
+    parser = argparse.ArgumentParser(
+        description="Benchmark the CMake-side cost of catch_discover_tests."
+    )
+    parser.add_argument(
+        "--script",
+        required=True,
+        help="Path to the CatchAddTests.cmake to benchmark.",
+    )
+    args = parser.parse_args()
+
+    if not os.path.exists(args.script):
+        sys.exit(f"Script to benchmark '{args.script}' does not exist")
+    if not os.path.exists(SHIM):
+        sys.exit(f"Copy-shim '{SHIM}' does not exist")
+
+    tag_modes = [False, True]
+
+    template_doc = load_template(TEMPLATE)
+
+    print(f"Benchmarking:  {os.path.abspath(args.script)}")
+    print(f"CMake version: {cmake_version()}")
+    print(f"Ns:            {COUNTS}")
+    print(f"Repeats:       {REPEATS}")
+    print()
+
+
+    results = []  # (count, tags_on, median_ms)
+    with tempfile.TemporaryDirectory() as workdir:
+        os.makedirs(workdir, exist_ok=True)
+        for count in COUNTS:
+            listing_path = os.path.join(workdir, f"listing-{count}.json")
+
+            for add_tags in tag_modes:
+                with open(listing_path, "w", encoding="utf-8") as f:
+                    synthesize_listing(template_doc, count, f, add_tags)
+                mode = "on" if add_tags else "off"
+                ctest_file = os.path.join(workdir, f"ctest-{count}-{mode}.cmake")
+                cmd = build_command(args, listing_path, ctest_file, add_tags)
+
+                # Untimed warmup run (populates any filesystem/OS caches).
+                run_once(cmd)
+                verify_output(ctest_file, count, add_tags)
+
+                timings = [run_once(cmd) for _ in range(REPEATS)]
+                median_ms = statistics.median(timings) * 1000.0
+                results.append((count, add_tags, median_ms))
+            print(f'N = {count} done in ~{len(tag_modes) * sum(timings):.2f} s')
+
+    print_table(COUNTS, tag_modes, results)
+
+
+if __name__ == "__main__":
+    main()

benchmarks/discover_tests/copy_shim.cmake

@@ -0,0 +1,40 @@
+# SPDX-License-Identifier: BSL-1.0
+
+# Fake Catch2 binary used by benchmark_discovery.py.
+#
+# catch_discover_tests_impl discovers tests by running
+#
+#     ${TEST_EXECUTOR} "${TEST_EXECUTABLE}" ... --list-tests --reporter json --out <file>
+#
+# and then reading the JSON listing back from <file>. This script fakes
+# being Catch2 binary by taking the fake JSON listing prepared by
+# `benchmark_discovery.py` and copying it over to the file path specified
+# after the `--out` argument.
+#
+# The fake JSON listing is passed as BENCH_LISTING CMake argument.
+
+if(NOT DEFINED BENCH_LISTING)
+  message(FATAL_ERROR "copy_shim: BENCH_LISTING is not set")
+endif()
+if(NOT EXISTS "${BENCH_LISTING}")
+  message(FATAL_ERROR "copy_shim: BENCH_LISTING '${BENCH_LISTING}' does not exist")
+endif()
+
+
+# FIXME: better handling of bad --out
+# Find the "--out <file>" argument pair among the forwarded arguments.
+set(_out_file "")
+math(EXPR _last "${CMAKE_ARGC} - 1")
+foreach(_i RANGE 0 ${_last})
+  if("${CMAKE_ARGV${_i}}" STREQUAL "--out")
+    math(EXPR _next "${_i} + 1")
+    set(_out_file "${CMAKE_ARGV${_next}}")
+    break()
+  endif()
+endforeach()
+
+if(_out_file STREQUAL "")
+  message(FATAL_ERROR "copy_shim: could not find '--out <file>' in arguments")
+endif()
+
+file(COPY_FILE "${BENCH_LISTING}" "${_out_file}")

benchmarks/discover_tests/listing_template.json

@@ -0,0 +1,85 @@
+{
+  "version": 2,
+  "metadata": {
+    "name": "benchmark-template",
+    "catch2-version": "3.15.2"
+  },
+  "listings": {
+    "tests": [
+      {
+        "name": "Comparing function pointers",
+        "tags": [
+          "function pointer",
+          "Tricky"
+        ]
+      },
+      {
+        "name": "Testing checked-if 4",
+        "tags": [
+          "!shouldfail",
+          "checked-if"
+        ]
+      },
+      {
+        "name": "count_equidistant_floats - double",
+        "tags": [
+          "approvals",
+          "distance",
+          "floating-point"
+        ]
+      },
+      {
+        "name": "Usage of AllTrue range matcher",
+        "tags": [
+          "matchers",
+          "quantifiers",
+          "templated"
+        ]
+      },
+      {
+        "name": "Exception matchers that succeed",
+        "tags": [
+          "!throws",
+          "exceptions",
+          "matchers"
+        ]
+      },
+      {
+        "name": "A TEMPLATE_TEST_CASE_METHOD based test run that succeeds - float",
+        "class-name": "Template_Fixture",
+        "tags": [
+          "class",
+          "template"
+        ]
+      },
+      {
+        "name": "Approximate PI",
+        "tags": [
+          "Approx",
+          "PI"
+        ]
+      },
+      {
+        "name": "TextFlow::Column respects width setting",
+        "tags": [
+          "approvals",
+          "column",
+          "TextFlow"
+        ]
+      },
+      {
+        "name": "Generators internals",
+        "tags": [
+          "generators",
+          "internals"
+        ]
+      },
+      {
+        "name": "Mayfail test case with nested sections",
+        "tags": [
+          "!mayfail"
+        ]
+      }
+    ]
+  }
+}

benchmarks/readme.md

@@ -56,9 +56,9 @@ _Note that we redirect the output to `/dev/null` to reduce the overhead of the a
 
 TODO:
   * Start empty binary (set up cost base)
-  * Start binary with X (100/1k/10k) tests (test registration cost)
   * Section tracking
 
+
 ## Compilation benchmarks
 
 As tests are often iterated upon and relinked, the compilation cost of
@@ -79,3 +79,39 @@ hyperfine --warmup 2 --parameter-list version old,vas --prepare 'find ~/benches/
 
 TODO:
   * Link-only recipe
+
+
+## Misc. benchmarks
+
+### `catch_discover_tests`
+
+The first JSON-based implementation of `catch_discover_tests` turned out
+to have quadratic complexity in number of tests, which meant that registering
+say 1k test cases took ~4s , and it became unusably slow with larger
+test suites.
+
+To prevent backsliding, and enable future optimizations, there is now
+a benchmarking script for `catch_discover_tests` in the `discover_tests`
+directory.
+
+`discover_tests/benchmark_discovery.py` runs the real `catch_discover_tests`
+implementation (through CMake script-mode) on a synthesized JSON listing
+(generated from `discover_tests/listing_template.json`) through an executor
+shim (`discover_tests/copy_shim.cmake`). This means it can run even without
+real test binary.
+
+If the JSON output from Catch2 changes, the synthesized JSON listing
+can be updated by taking a real listing from `SelfTest` binary, and pruning
+it down to keep only ~10 entries.
+
+
+#### Examples
+
+**Benchmark the current `catch_discover_tests`, with and without tags-as-labels**
+```text
+./benchmarks/discover_tests/benchmark_discovery.py --script ./extras/CatchAddTests.cmake
+```
+
+Note that 8k test cases is unrealistically high, but still useful to see scaling.
+Benchmark for single test case is useful to provide estimate of the flat
+overhead from using `catch_discover_tests` at all.

docs/cmake-integration.md

@@ -212,6 +212,17 @@ execution (useful e.g. in cross-compilation environments).
 calling ``catch_discover_tests``. This provides a mechanism for globally
 selecting a preferred test discovery behavior.
 
+_Note that on Apple Silicon with the Xcode generator you must use `PRE_TEST`,
+e.g. `catch_discover_tests(tests DISCOVERY_MODE PRE_TEST)`. With the default
+`POST_BUILD` mode the build fails with `Result: Subprocess killed`, because
+macOS on Apple Silicon refuses to run unsigned binaries and Xcode code-signs
+the test executable only **after** the post-build script that `POST_BUILD`
+mode uses to run it for test discovery. `PRE_TEST` avoids this by delaying
+discovery until test time, when the executable is already signed. The same
+limitation affects CMake's `gtest_discover_tests`; see
+[Catch2 #2411](https://github.com/catchorg/Catch2/issues/2411) and
+[CMake #21845](https://gitlab.kitware.com/cmake/cmake/-/issues/21845)._
+
 * `SKIP_IS_FAILURE`
 
 Skipped tests will be marked as failed instead.

docs/command-line.md

@@ -26,7 +26,7 @@
 [Disable statistical analysis of collected benchmark samples](#disable-statistical-analysis-of-collected-benchmark-samples)<br>
 [Specify the amount of time in milliseconds spent on warming up each test](#specify-the-amount-of-time-in-milliseconds-spent-on-warming-up-each-test)<br>
 [Usage](#usage)<br>
-[Specify the section to run](#specify-the-section-to-run)<br>
+[Specify the section/generator element to run](#specify-the-sectiongenerator-element-to-run)<br>
 [Filenames as tags](#filenames-as-tags)<br>
 [Override output colouring](#override-output-colouring)<br>
 [Test Sharding](#test-sharding)<br>
@@ -202,8 +202,13 @@ as many times as you want, e.g. `--reporter xml::out=someFile.xml` or
 
 The keys must either be prefixed by "X", in which case they are not parsed
 by Catch2 and are only passed down to the reporter, or one of options
-hardcoded into Catch2. Currently there are only 2,
-["out"](#sending-output-to-a-file), and ["colour-mode"](#colour-mode).
+hardcoded into Catch2. Currently there are 3 supported options:
+
+* ["out"](#sending-output-to-a-file)
+* ["colour-mode"](#colour-mode)
+* ["verbosity"](#output-verbosity)
+
+> Support for per-reporter verbosity option was added in Catch2 3.16.0
 
 _Note that the reporter might still check the X-prefixed options for
 validity, and throw an error if they are wrong._

docs/contributing.md

@@ -7,6 +7,8 @@
 [Writing documentation](#writing-documentation)<br>
 [Writing code](#writing-code)<br>
 [CoC](#coc)<br>
+[Using LLMs when contributing](#using-llms-when-contributing)<br>
+
 
 So you want to contribute something to Catch2? That's great! Whether it's
 a bug fix, a new feature, support for additional compilers - or just
@@ -332,6 +334,19 @@ When adding new `CATCH_CONFIG` option, there are multiple places to edit:
 This project has a [CoC](../CODE_OF_CONDUCT.md). Please adhere to it
 while contributing to Catch2.
 
+
+## Using LLMs when contributing
+
+I do not care whether you used LLM for your contribution. What I care
+about is the quality of the contribution, not whether you made it through
+prompting LLM, letting GAs run wild, dictated it into the computer, wrote
+it using your nose or used butterflies to flip the correct bits.
+
+The flipside of this is that I am also not going to iterate your LLM for
+you. If a PR looks LLM generated and does not pass the muster to be merged
+as-is, I am going to close it.
+
+
 -----------
 
 _This documentation will always be in-progress as new information comes

docs/release-notes.md

@@ -2,6 +2,9 @@
 
 # Release notes
 **Contents**<br>
+[3.16.0](#3160)<br>
+[3.15.3](#3153)<br>
+[3.15.2](#3152)<br>
 [3.15.1](#3151)<br>
 [3.15.0](#3150)<br>
 [3.14.0](#3140)<br>
@@ -76,6 +79,67 @@
 [Even Older versions](#even-older-versions)<br>
 
 
+
+## 3.16.0
+
+### Fixes
+* Multiple fixes in `catch_discover_tests`:
+  * Fixed `<target>_TESTS` variable accumulating JSON fragments alongside test names.
+    * This was introduced during the refactoring in last release.
+  * Fixed `<target>_TESTS` variable from `catch_discover_tests` not escaping test names to be properly parsed by CMake.
+    * This means that e.g. test names with semicolons will not be split into multiple partial test names.
+    * This bug has existed since the first version of the script.
+  * Fixed `TEST_PREFIX`/`TEST_SUFFIX` args having leading/trailing whitespace stripped.
+* Added workaround for Clang 20-21 compile error with `TEMPLATE_PRODUCT_TEST_CASE` (#3115, #3173)
+
+### Improvements
+* Verbosity option is now handled per reporter.
+  * The standalone `--verbosity` flag is propagated to all reporters as default, just like `--colour-mode`.
+* The JSON reporter considers verbosity when listing tests.
+* Another set of performance improvements for `catch_discover_tests` performance
+  * The newest version can register about 3k tests in 1 second, up from 1k previously.
+* The initial `TEST_CASE` registration is slightly faster.
+* Reduced overhead from first instantiating `BENCHMARK` machinery in a TU.
+* Improved compilation speed when multiple templated test case macros use the same types.
+* Rewrote implementation of the string matchers
+  * Case-sensitive matching (the default) is significantly faster.
+  * Case-insensitive matching is faster in most cases.
+* Added optimizer barrier to calls into benchmarks without return values
+  * This limits the optimizations compiler can perform **between calls** into the benchmarked function, improving the accuracy.
+* Added warning that checks for using sharding without deterministic test order (#3186)
+
+
+## 3.15.3
+
+### Fixes
+* The JSON reporter's number handling is locale-independent. (#3176)
+* Removed leftover debug message from `catch_discover_tests` (#3177)
+* Fixed typo in the "Could not jump to the Nth element" exception message (#3181)
+
+### Improvements
+* `catch_discover_tests` registers tests in deterministic (alphabetical) order.
+* `catch_discover_tests` has been rewritten to be massively faster.
+  * Preparing the actual CTest script is significantly faster.
+  * Parsing the JSON test array is significantly faster.
+  * Running without `ADD_TAGS_AS_LABELS` set is 10-15% faster (as opposed to being the same speed) (#3169)
+  * The new implementation is about 4x-5x faster, so registering 500 tests now takes ~350ms (down from 1.1s).
+* JSON writing is faster
+  * Small improvement in writing non-string values
+  * ~6-40% improvement in writing string values that do not need escaping
+  * ~1-6% improvement in writing string values that do need escaping
+* Better support for infs and NaNs in JSON output
+
+
+## 3.15.2
+
+### Fixes
+* Fixed `--warn InfiniteGenerators` triggering even if the generator was limited to specific element via path filtering.
+* Fixed `-Wunused-parameter` triggering in `-fnoexceptions` builds.
+
+### Improvements
+* `catch_discover_tests` can handle cases where the binary prints out non-Catch2 output due to global constructors (#3162)
+
+
 ## 3.15.1
 
 ### Fixes

docs/reporters.md

@@ -43,13 +43,13 @@ them write into different destinations. The two main uses of this are
 
 Specifying multiple reporter looks like this:
 ```
---reporter JUnit::out=result-junit.xml --reporter console::out=-::colour-mode=ansi
+--reporter JUnit::out=result-junit.xml --reporter console::out=-::colour-mode=ansi::verbosity=quiet
 ```
 
 This tells Catch2 to use two reporters, `JUnit` reporter that writes
 its machine-readable XML output to file `result-junit.xml`, and the
-`console` reporter that writes its user-friendly output to stdout and
-uses ANSI colour codes for colouring the output.
+`console` reporter that writes its user-friendly output to stdout, uses
+ANSI colour codes for colouring the output and is set to "quiet" verbosity.
 
 Using multiple reporters (or one reporter and one-or-more [event
 listeners](event-listeners.md#top)) can have surprisingly complex semantics
@@ -110,7 +110,7 @@ passing and failing assertions.
 
 _Generally we recommend that if you override a member function from either
 of the bases, you call into the base's implementation first. This is not
-necessarily in all cases, but it is safer and easier._
+necessary in all cases, but it is safer and easier._
 
 
 Writing your own reporter then looks like this:

extras/Catch.cmake

@@ -44,7 +44,7 @@ same as the Catch name; see also ``TEST_PREFIX`` and ``TEST_SUFFIX``.
 
   ``catch_discover_tests`` sets up a post-build command on the test executable
   that generates the list of tests by parsing the output from running the test
-  with the ``--list-test-names-only`` argument.  This ensures that the full
+  with the ``--list-tests --reporter json`` argument.  This ensures that the full
   list of tests is obtained.  Since test discovery occurs at build time, it is
   not necessary to re-run CMake when the list of tests changes.
   However, it requires that :prop_tgt:`CROSSCOMPILING_EMULATOR` is properly set
@@ -58,6 +58,11 @@ same as the Catch name; see also ``TEST_PREFIX`` and ``TEST_SUFFIX``.
   directory property.  The set of discovered tests is made accessible to such a
   script via the ``<target>_TESTS`` variable.
 
+  Note that ``<target>_TESTS`` variable contains test names with brackets
+  ("[", "]") escaped into ASCII char 2, 3 respectively, to work around CMake's
+  list parsing rules. You have to unescape them back for each element to get
+  the original names.
+
   The options are:
 
   ``target``
@@ -67,7 +72,7 @@ same as the Catch name; see also ``TEST_PREFIX`` and ``TEST_SUFFIX``.
 
   ``TEST_SPEC arg1...``
     Specifies test cases, wildcarded test cases, tags and tag expressions to
-    pass to the Catch executable with the ``--list-test-names-only`` argument.
+    pass to the Catch executable when listing the tests.
 
   ``EXTRA_ARGS arg1...``
     Any extra arguments to pass on the command line to each test case.
@@ -146,6 +151,12 @@ same as the Catch name; see also ``TEST_PREFIX`` and ``TEST_SUFFIX``.
     calling ``catch_discover_tests``. This provides a mechanism for globally selecting
     a preferred test discovery behavior without having to modify each call site.
 
+    On Apple Silicon with the Xcode generator you must use ``PRE_TEST``. With the
+    default ``POST_BUILD`` mode the build fails with ``Result: Subprocess killed``,
+    because macOS on Apple Silicon refuses to run unsigned binaries and Xcode
+    code-signs the test executable only after the post-build script that
+    ``POST_BUILD`` mode uses to run it for test discovery. See Catch2 issue #2411.
+
   ``SKIP_IS_FAILURE``
     Disables skipped test detection.
 
@@ -220,8 +231,8 @@ function(catch_discover_tests TARGET)
               -D "TEST_SPEC=${_TEST_SPEC}"
               -D "TEST_EXTRA_ARGS=${_EXTRA_ARGS}"
               -D "TEST_PROPERTIES=${_PROPERTIES}"
-              -D "TEST_PREFIX=${_TEST_PREFIX}"
-              -D "TEST_SUFFIX=${_TEST_SUFFIX}"
+              -D "TEST_PREFIX='${_TEST_PREFIX}'"
+              -D "TEST_SUFFIX='${_TEST_SUFFIX}'"
               -D "TEST_LIST=${_TEST_LIST}"
               -D "TEST_REPORTER=${_REPORTER}"
               -D "TEST_OUTPUT_DIR=${_OUTPUT_DIR}"
@@ -266,8 +277,8 @@ function(catch_discover_tests TARGET)
       "      TEST_SPEC"              " [==[" "${_TEST_SPEC}"              "]==]"   "\n"
       "      TEST_EXTRA_ARGS"        " [==[" "${_EXTRA_ARGS}"             "]==]"   "\n"
       "      TEST_PROPERTIES"        " [==[" "${_PROPERTIES}"             "]==]"   "\n"
-      "      TEST_PREFIX"            " [==[" "${_TEST_PREFIX}"            "]==]"   "\n"
-      "      TEST_SUFFIX"            " [==[" "${_TEST_SUFFIX}"            "]==]"   "\n"
+      "      TEST_PREFIX"            " [==['" "${_TEST_PREFIX}"            "']==]"   "\n"
+      "      TEST_SUFFIX"            " [==['" "${_TEST_SUFFIX}"            "']==]"   "\n"
       "      TEST_LIST"              " [==[" "${_TEST_LIST}"              "]==]"   "\n"
       "      TEST_REPORTER"          " [==[" "${_REPORTER}"               "]==]"   "\n"
       "      TEST_OUTPUT_DIR"        " [==[" "${_OUTPUT_DIR}"             "]==]"   "\n"

extras/CatchAddTests.cmake

@@ -1,23 +1,220 @@
 # Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
 # file Copyright.txt or https://cmake.org/licensing for details.
 
-function(add_command NAME)
-  set(_args "")
-  # use ARGV* instead of ARGN, because ARGN splits arrays into multiple arguments
-  math(EXPR _last_arg ${ARGC}-1)
-  foreach(_n RANGE 1 ${_last_arg})
-    set(_arg "${ARGV${_n}}")
-    if(_arg MATCHES "[^-./:a-zA-Z0-9_]")
-      set(_args "${_args} [==[${_arg}]==]") # form a bracket_argument
-    else()
-      set(_args "${_args} ${_arg}")
+# Because natively using CMake's JSON processing for arrays leads to quadratic
+# running times, we do terrible hack and split JSON array by object boundary
+# + commas and try to reconstruct valid JSON objects. During this, we need
+# to replace CMake characters that could be in the test name/tags with
+# placeholder, so it doesn't affect CMake's processing of the strings/lists
+# we create during the parsing.
+#
+# We use 0x01, 0x02, 0x03, and 0x04 as placeholder bytes, as those cannot
+# exist in JSON unescaped.
+#
+#   0x01  <=> ';'   (CMake list separator)
+#   0x02  <-> '['   (opens a CMake bracket-argument context)
+#   0x03  <-> ']'   (closes a CMake bracket-argument context)
+#   0x04  ==  element boundary marker used while splitting the tests array
+#
+string(ASCII 1 _SemicolonEscape)
+string(ASCII 2 _OpenBracketEscape)
+string(ASCII 3 _CloseBracketEscape)
+string(ASCII 4 _BoundaryEscape)
+
+
+# As far as I can tell, the only way of having unclosed '[' or ']' in the
+# list of test names we define for CTest, is to escape them into completely
+# different characters. Otherwise, they will break parsing of unrelated
+# semicolons (inserted by CMake after parsing the list from the user-facing
+# space separated format). This means that the consumers of the list have
+# to unescape them back, but that's CMake :v
+#
+#   0x02  <-> '['
+#   0x03  <-> ']'
+#
+string(ASCII 2 _OpenBracketListingEscape)
+string(ASCII 3 _CloseBracketListingEscape)
+
+
+# Placeholder bytes in the listing would break our parsing hack, so
+# we check they don't exist. They shouldn't exist in valid JSON, but
+# the reporter might not be escaping them properly.
+function(validate_input_noescapes listing_var)
+  foreach(byte "${_SemicolonEscape}" "${_BoundaryEscape}" "${_OpenBracketEscape}" "${_CloseBracketEscape}")
+    string(FIND "${${listing_var}}" "${byte}" found)
+    if(NOT found EQUAL -1)
+      message(FATAL_ERROR
+        "The test listing contains raw control byte (0x01-0x04) which should not "
+        "be there. This means either bad escaping in JSON reporter, or corrupted file. "
+      )
     endif()
   endforeach()
-  set(script "${script}${NAME}(${_args})\n" PARENT_SCOPE)
+endfunction()
+
+
+# Replaces relevant characters with their placeholders, see the top of this file.
+# Modifies argument `var` in place.
+function(magic_escape_chars var)
+  set(value "${${var}}")
+  string(REPLACE ";" "${_SemicolonEscape}" value "${value}")
+  string(REPLACE "[" "${_OpenBracketEscape}" value "${value}")
+  string(REPLACE "]" "${_CloseBracketEscape}" value "${value}")
+  set(${var} "${value}" PARENT_SCOPE)
+endfunction()
+
+
+# Turns placeholders back into original characters, see the top of this file.
+# Modifies argument `var` in place.
+function(magic_unescape_chars var)
+  set(value "${${var}}")
+  string(REPLACE "${_SemicolonEscape}" ";" value "${value}")
+  string(REPLACE "${_OpenBracketEscape}" "[" value "${value}")
+  string(REPLACE "${_CloseBracketEscape}" "]" value "${value}")
+  set(${var} "${value}" PARENT_SCOPE)
+endfunction()
+
+
+# Abuses knowledge of Catch2's JSON reporter output for listing tests to
+# split JSON array of the test listings into a CMake list of strings,
+# with each element being the JSON string of one array entry.
+#
+# This avoids the terrible quadratic running time of using CMake's JSON
+# support to parse the JSON reporter output "properly", where the whole
+# JSON array of tests is parsed again for every element. Instead, we can
+# use the CMake's API to only parse the individual test's objects, which
+# are usually small and only have to be reparsed fixed number of times
+# (once for test names, once for labels).
+#
+# We process the string representing the JSON array by splitting it on
+# `}<ws>*,<ws>*{` and then checking for each chunk whether it is a valid
+# JSON object representing Catch2's test. If not (e.g. because we split
+# on the presence of `}<ws>*,<ws>*{` inside a test name), then we append
+# the next chunk to the current one and check again. And again, until
+# we get back to a valid JSON.
+#
+# Note that to support passing the object strings back from the function,
+# they will still contain the placeholders and need to be unescaped before
+# further processing (e.g. sending them into CMake's JSON parsing API).
+function(split_json_array json_array_var out_var)
+  # We have to pass the input by var name to avoid CMake processing
+  # the input as an arg.
+  set(json_in "${${json_array_var}}")
+
+  # Strip the array brackets at the start and end of the JSON array.
+  # Must happen before we escape the other [] instances below from the
+  # actual array data.
+  string(REGEX REPLACE "^[ \t\r\n]*\\[" "" json_in "${json_in}")
+  string(REGEX REPLACE "\\][ \t\r\n]*$" "" json_in "${json_in}")
+
+  magic_escape_chars(json_in)
+
+  # We need to keep the whitespace around comma around, so that if we
+  # split inside the test object, we can reconstruct it losslessly.
+  string(REGEX REPLACE "(}[ \t\r\n]*)[,]([ \t\r\n]*{)" "\\1${_BoundaryEscape}\\2" json_in "${json_in}")
+
+  # We escaped all list separators above, so now we can turn the JSON
+  # string into a CMake list of fragments in single pass.
+  string(REPLACE "${_BoundaryEscape}" ";" fragments "${json_in}")
+
+  # And now we have to reconstruct the actual JSON structure from fragments.
+  set(array_elements "")
+  set(accumulator "")
+  foreach(next_fragment IN LISTS fragments)
+    if(accumulator)
+      set(accumulator "${accumulator},${next_fragment}")
+    else()
+      set(accumulator "${next_fragment}")
+    endif()
+
+    # Because the fragments (might) contain invalid JSON characters due
+    # to escaping, we have to unescape it before checking if we can parse it.
+    set(maybe_json "${accumulator}")
+    magic_unescape_chars(maybe_json)
+    string(JSON unused ERROR_VARIABLE err GET "${maybe_json}" "name")
+    if(err STREQUAL "NOTFOUND")
+      list(APPEND array_elements "${accumulator}")
+      set(accumulator "")
+    endif()
+  endforeach()
+
+  set(${out_var} "${array_elements}" PARENT_SCOPE)
+endfunction()
+
+
+# Prepare (a part of) command with bracketed arguments and return it via `out_var`.
+#
+# This allows the registration script to escape parts of the test script
+# only once, instead of escaping the unchanged arguments over and over again.
+function(prepare_command_fragment out_var)
+  set(_args "")
+  math(EXPR _last_arg ${ARGC}-1)
+  if(_last_arg GREATER_EQUAL 1)
+    foreach(_n RANGE 1 ${_last_arg})
+      set(_arg "${ARGV${_n}}")
+      if(_arg MATCHES "[^-./:a-zA-Z0-9_]")
+        set(_args "${_args} [==[${_arg}]==]") # form a bracket_argument
+      else()
+        set(_args "${_args} ${_arg}")
+      endif()
+    endforeach()
+  endif()
+  set(${out_var} "${_args}" PARENT_SCOPE)
+endfunction()
+
+
+# Generates random filename in the temp folder.
+# Temp folder is retrieved by checking env vars from various platforms.
+function(make_temp_file_path OUT_VARIABLE FALLBACK_PATH)
+  set(TEMP_DIR "")
+  set(ENV_VARS
+    # From XDG base dir specification
+    XDG_RUNTIME_DIR
+    # From POSIX standard
+    TMPDIR
+    # From Windows
+    TMP
+    TEMP
+  )
+
+  foreach(var ${ENV_VARS})
+    if(DEFINED ENV{${var}} AND NOT "$ENV{${var}}" STREQUAL "")
+        set(TEMP_DIR "$ENV{${var}}")
+        break()
+    endif()
+  endforeach()
+
+  # If all checks fail, we use the fallback path
+  if(TEMP_DIR STREQUAL "")
+    set(TEMP_DIR "${FALLBACK_PATH}")
+  endif()
+
+  file(TO_CMAKE_PATH "${TEMP_DIR}" TEMP_DIR)
+
+  # Generate the random file name
+  string(RANDOM LENGTH 8 RAND_ID)
+  set(FINAL_TEMP_PATH "${TEMP_DIR}/Catch2-test-listing.${RAND_ID}.json")
+
+  set(${OUT_VARIABLE} "${FINAL_TEMP_PATH}" PARENT_SCOPE)
+endfunction()
+
+# Computes the path of the test-list file based on the path for the main
+# CTest script file (passed in `CTEST_FILE`).
+#
+# It works by replacing the `_tests` part of the original name with
+# `_test-list`, or failing that, it appends `-list.cmake` instead.
+#
+#   <base>_tests.cmake       -> <base>_test-list.cmake
+#   <base>_tests-Debug.cmake -> <base>_test-list-Debug.cmake
+function(make_test_list_file_path CTEST_FILE OUT_VARIABLE)
+  if("${CTEST_FILE}" MATCHES "_tests(.*)\\.cmake$")
+    string(REGEX REPLACE "_tests(.*)\\.cmake$" "_test-list\\1.cmake" list_file "${CTEST_FILE}")
+  else()
+    set(list_file "${CTEST_FILE}-list.cmake")
+  endif()
+  set(${OUT_VARIABLE} "${list_file}" PARENT_SCOPE)
 endfunction()
 
 function(catch_discover_tests_impl)
-
   cmake_parse_arguments(
     ""
     ""
@@ -26,9 +223,22 @@ function(catch_discover_tests_impl)
     ${ARGN}
   )
 
+  # We write the list of all discovered tests into a separate file
+  make_test_list_file_path("${_CTEST_FILE}" _CTEST_LIST_FILE)
+
+  # We periodically append to the output files below, so we have to ensure
+  # that it is empty at the start, or we get duplicated test scripts.
+  file(REMOVE "${_CTEST_FILE}")
+  file(REMOVE "${_CTEST_LIST_FILE}")
+
+  # Size (in Bytes) at which the intermediate `script` var is dumped to file.
+  set(_WriteToFileThreshold 50000)
+
   set(add_tags "${_ADD_TAGS_AS_LABELS}")
-  set(prefix "${_TEST_PREFIX}")
-  set(suffix "${_TEST_SUFFIX}")
+  # TEST_{PREFIX,SUFFIX} is enclosed in single quotes to keep ensure
+  # leading/trailing whitespace isn't trimmed by CMake's argument passing.
+  string(REGEX REPLACE "^'(.*)'$" "\\1" prefix "${_TEST_PREFIX}")
+  string(REGEX REPLACE "^'(.*)'$" "\\1" suffix "${_TEST_SUFFIX}")
   set(spec ${_TEST_SPEC})
   set(extra_args ${_TEST_EXTRA_ARGS})
   set(properties ${_TEST_PROPERTIES})
@@ -42,6 +252,10 @@ function(catch_discover_tests_impl)
   set(script)
   set(suite)
   set(tests)
+  # Holds the list of all registered test names **as a string**, not list.
+  # This avoids issue of CMake removing semicolon escapes even inside
+  # bracket-quoted strings.
+  set(_test_names)
 
   if(WIN32)
     set(dl_paths_variable_name PATH)
@@ -72,8 +286,19 @@ function(catch_discover_tests_impl)
     set(ENV{DYLD_FRAMEWORK_PATH} "${paths}")
   endif()
 
+  make_temp_file_path(listing_output_path "${_TEST_WORKING_DIR}")
+
+  set(_Verbosity "quiet")
+  if (add_tags)
+    set(_Verbosity "normal")
+  endif()
+
   execute_process(
-    COMMAND ${_TEST_EXECUTOR} "${_TEST_EXECUTABLE}" ${spec} --list-tests --reporter json
+    COMMAND ${_TEST_EXECUTOR} "${_TEST_EXECUTABLE}" ${spec}
+      --list-tests
+      --reporter "json::verbosity=${_Verbosity}"
+      --out "${listing_output_path}"
+      --order lex # Make sure the output order, and thus test registration order, is consistent across runs.
     OUTPUT_VARIABLE listing_output
     RESULT_VARIABLE result
     WORKING_DIRECTORY "${_TEST_WORKING_DIR}"
@@ -86,6 +311,11 @@ function(catch_discover_tests_impl)
     )
   endif()
 
+  # Read the JSON output back from the output file and validate it.
+  file(READ ${listing_output_path} listing_output)
+  file(REMOVE ${listing_output_path})
+  validate_input_noescapes(listing_output)
+
   # Prepare reporter
   if(reporter)
     set(reporter_arg "--reporter ${reporter}")
@@ -136,26 +366,87 @@ function(catch_discover_tests_impl)
 
   # Parse JSON output for list of tests/class names/tags
   string(JSON version GET "${listing_output}" "version")
-  if(NOT version STREQUAL "1")
+  if(NOT version STREQUAL "2")
     message(FATAL_ERROR "Unsupported catch output version: '${version}'")
   endif()
 
-  # Speed-up reparsing by cutting away unneeded parts of JSON.
+  # Extract just the JSON array with tests and then split them into
+  # individual objects.
   string(JSON test_listing GET "${listing_output}" "listings" "tests")
-  string(JSON num_tests LENGTH "${test_listing}")
+  split_json_array(test_listing tests)
 
   # Exit early if no tests are detected
-  if(num_tests STREQUAL "0")
-    file(WRITE "${_CTEST_FILE}" "")
+  if(NOT tests)
+    # Still emit an (empty) test list file and have the main script include
+    # it, so that consumers relying on the `${_TEST_LIST}` variable and on the
+    # include structure get consistent behavior regardless of test count.
+    file(WRITE "${_CTEST_LIST_FILE}" "set(${_TEST_LIST})\n")
+    file(WRITE "${_CTEST_FILE}" "include(\"${_CTEST_LIST_FILE}\")\n")
     return()
   endif()
 
-  # CMake's foreach-RANGE is inclusive, so we have to subtract 1
-  math(EXPR num_tests "${num_tests} - 1")
 
-  foreach(idx RANGE ${num_tests})
-    string(JSON single_test GET ${test_listing} ${idx})
-    string(JSON test_tags GET "${single_test}" "tags")
+  # The 'set(VAR` header for the test list has to be written separately,
+  # so that each test name can be appended file without further processing.
+  set(test_names "set(${_TEST_LIST}")
+
+  # Most of the commands/arguments in the CTest script are identical
+  # for every test registered with one `catch_discover_tests` call.
+  # To avoid repeating the work in escaping them, we escape them before
+  # the per-test loop and reuse the escaped fragments.
+  #
+  # `add_test` calls are
+  #   add_test(<name><exec><exe><escaped_name><extra_args><reporter><out_dir>)
+  # Of these, <exec>,<exe>,<extra_args>, and <reporter> are the same between
+  # all tests.
+  prepare_command_fragment(_exec_exe_fragment
+    ${_TEST_EXECUTOR}
+    "${_TEST_EXECUTABLE}"
+  )
+  prepare_command_fragment(_args_reporter_fragment
+    ${extra_args}
+    "${reporter_arg}"
+  )
+
+  # `set_tests_properties` calls are
+  #   set_tests_properties(<name> PROPERTIES WORKING_DIRECTORY <dir> <properties>)
+  #   set_tests_properties(<name> PROPERTIES ENVIRONMENT_MODIFICATION <env_mod>)
+  # Of these, only the <name> changes between tests.
+  prepare_command_fragment(_properties_fragment
+    PROPERTIES
+    WORKING_DIRECTORY "${_TEST_WORKING_DIR}"
+    ${properties}
+  )
+  # Env modification is optional, so we prepare it in a separate command
+  if(environment_modifications)
+    prepare_command_fragment(_env_modification_fragment
+      PROPERTIES
+      ENVIRONMENT_MODIFICATION "${environment_modifications}"
+    )
+  endif()
+
+  # Each element in the tests is JSON-string representing one test object.
+  # We have to parse it and then turn it into CTest script commands.
+  foreach(single_test IN LISTS tests)
+    # Because appending to the same string in CMake has quadratic runtime,
+    # we flush the script into the file periodically to avoid the worst case.
+    string(LENGTH "${script}" script_len)
+    if (script_len GREATER _WriteToFileThreshold)
+      file(APPEND "${_CTEST_FILE}" "${script}")
+      set(script "")
+    endif()
+    string(LENGTH "${test_names}" names_len)
+    if (names_len GREATER _WriteToFileThreshold)
+      file(APPEND "${_CTEST_LIST_FILE}" "${test_names}")
+      set(test_names "")
+    endif()
+
+    # The elements are still escaped and contain JSON-invalid characters,
+    # they have to be unescaped before parsing them as JSON.
+    magic_unescape_chars(single_test)
+    if(add_tags)
+      string(JSON test_tags GET "${single_test}" "tags")
+    endif()
     string(JSON plain_name GET "${single_test}" "name")
 
     # Escape characters in test case names that would be parsed by Catch2
@@ -170,22 +461,15 @@ function(catch_discover_tests_impl)
       set(output_dir_arg "--out ${output_dir}/${output_prefix}${escaped_name_clean}${output_suffix}")
     endif()
 
-    # ...and add to script
-    add_command(add_test
-      "${prefix}${plain_name}${suffix}"
-      ${_TEST_EXECUTOR}
-      "${_TEST_EXECUTABLE}"
-      "${escaped_name}"
-      ${extra_args}
-      "${reporter_arg}"
-      "${output_dir_arg}"
-    )
-    add_command(set_tests_properties
-      "${prefix}${plain_name}${suffix}"
-      PROPERTIES
-      WORKING_DIRECTORY "${_TEST_WORKING_DIR}"
-      ${properties}
-    )
+    set(full_name "${prefix}${plain_name}${suffix}")
+    prepare_command_fragment(_full_name_fragment "${full_name}")
+    prepare_command_fragment(_escaped_name_fragment "${escaped_name}")
+    prepare_command_fragment(_outdir_fragment "${output_dir_arg}")
+
+    string(APPEND script
+      "add_test(${_full_name_fragment}${_exec_exe_fragment}${_escaped_name_fragment}${_args_reporter_fragment}${_outdir_fragment})\n")
+    string(APPEND script
+      "set_tests_properties(${_full_name_fragment}${_properties_fragment})\n")
 
     if(add_tags)
       string(JSON num_tags LENGTH "${test_tags}")
@@ -205,33 +489,44 @@ function(catch_discover_tests_impl)
           list(APPEND tag_list "${a_tag}")
         endforeach()
 
-        add_command(set_tests_properties
-          "${prefix}${plain_name}${suffix}"
+        prepare_command_fragment(_labels_fragment
           PROPERTIES
           LABELS "${tag_list}"
         )
+        string(APPEND script "set_tests_properties(${_full_name_fragment}${_labels_fragment})\n")
       endif()
     endif(add_tags)
 
     if(environment_modifications)
-      add_command(set_tests_properties
-        "${prefix}${plain_name}${suffix}"
-        PROPERTIES
-        ENVIRONMENT_MODIFICATION "${environment_modifications}")
+      string(APPEND script "set_tests_properties(${_full_name_fragment}${_env_modification_fragment})\n")
     endif()
 
-    list(APPEND tests "${prefix}${plain_name}${suffix}")
+    # The test name has to be escaped using the same rules as prepare_command
+    # uses for the arguments, so that it keeps being single element in list
+    # even with weird characters and semicolons.
+    set(full_list_name "${prefix}${plain_name}${suffix}")
+    string(REPLACE ";" "\\;" full_list_name "${full_list_name}")
+    string(REPLACE "[" "${_OpenBracketListingEscape}" full_list_name "${full_list_name}")
+    string(REPLACE "]" "${_CloseBracketListingEscape}" full_list_name "${full_list_name}")
+    if(full_list_name MATCHES "[^-./:a-zA-Z0-9_]")
+      # The space before the start of quote is important, so that we get
+      # space-separated list in the final file.
+      string(APPEND test_names " [==[${full_list_name}]==]")
+    else()
+      string(APPEND test_names " ${full_list_name}")
+    endif()
   endforeach()
 
-  # Create a list of all discovered tests, which users may use to e.g. set
-  # properties on the tests
-  add_command(set ${_TEST_LIST} ${tests})
-
-  # Write CTest script
-  file(WRITE "${_CTEST_FILE}" "${script}")
+  # Write any test names leftovers we have
+  file(APPEND "${_CTEST_LIST_FILE}" "${test_names})\n")
+  # Write any main script leftovers we have, and append the include of test names
+  file(APPEND "${_CTEST_FILE}" "${script}")
+  file(APPEND "${_CTEST_FILE}" "include(\"${_CTEST_LIST_FILE}\")\n")
 endfunction()
 
-if(CMAKE_SCRIPT_MODE_FILE)
+# To enable `include`ing this file in the unit test scripts, we only run
+# the impl if an actual `TEST_EXECUTABLE` is provided.
+if(CMAKE_SCRIPT_MODE_FILE AND DEFINED TEST_EXECUTABLE)
   catch_discover_tests_impl(
     TEST_EXECUTABLE ${TEST_EXECUTABLE}
     TEST_EXECUTOR ${TEST_EXECUTOR}

extras/catch_amalgamated.cpp

@@ -6,8 +6,8 @@
 
 // SPDX-License-Identifier: BSL-1.0
 
-//  Catch v3.15.1
-//  Generated: 2026-06-14 10:51:56.053498
+//  Catch v3.16.0
+//  Generated: 2026-08-25 09:29:23.172704
 //  ----------------------------------------------------------
 //  This file is an amalgamation of multiple different files.
 //  You probably shouldn't edit it directly.
@@ -40,6 +40,54 @@
 
 
 
+#include <algorithm>
+#include <chrono>
+#include <cmath>
+
+namespace Catch {
+    namespace Benchmark {
+        namespace Detail {
+
+            Environment measure_environment_default() {
+                return Detail::measure_environment<default_clock>();
+            }
+
+            ExecutionPlan prepare_default( const IConfig& cfg,
+                                           Environment env,
+                                           BenchmarkFunction&& fun ) {
+                // This mirrors Benchmark::prepare<default_clock>(), but with the
+                // clock fixed so it is instantiated once here in the library.
+                auto min_time = env.clock_resolution.mean * Detail::minimum_ticks;
+                auto run_time = std::max(
+                    min_time,
+                    std::chrono::duration_cast<decltype( min_time )>(
+                        cfg.benchmarkWarmupTime() ) );
+                auto&& test = Detail::run_for_at_least<default_clock>(
+                    std::chrono::duration_cast<IDuration>( run_time ), 1, fun );
+                int new_iters = static_cast<int>(
+                    std::ceil( min_time * test.iterations / test.elapsed ) );
+                return { new_iters,
+                         test.elapsed / test.iterations * new_iters *
+                             cfg.benchmarkSamples(),
+                         CATCH_MOVE( fun ),
+                         std::chrono::duration_cast<FDuration>(
+                             cfg.benchmarkWarmupTime() ),
+                         Detail::warmup_iterations };
+            }
+
+            std::vector<FDuration> run_plan_default( ExecutionPlan const& plan,
+                                                     const IConfig& cfg,
+                                                     Environment env ) {
+                return plan.run<default_clock>( cfg, env );
+            }
+
+        } // namespace Detail
+    } // namespace Benchmark
+} // namespace Catch
+
+
+
+
 namespace Catch {
     namespace Benchmark {
         namespace Detail {
@@ -795,6 +843,7 @@ namespace Catch {
         return lhs.name == rhs.name &&
                lhs.outputFilename == rhs.outputFilename &&
                lhs.colourMode == rhs.colourMode &&
+               lhs.verbosity == rhs.verbosity &&
                lhs.customOptions == rhs.customOptions;
     }
 
@@ -863,6 +912,7 @@ namespace Catch {
                 reporterSpec.outputFile() ? *reporterSpec.outputFile()
                                           : data.defaultOutputFilename,
                 reporterSpec.colourMode().valueOr( data.defaultColourMode ),
+                reporterSpec.verbosity().valueOr( data.verbosity ),
                 reporterSpec.customOptions() } );
         }
     }
@@ -913,6 +963,7 @@ namespace Catch {
     double Config::minDuration() const                 { return m_data.minDuration; }
     TestRunOrder Config::runOrder() const              { return m_data.runOrder; }
     uint32_t Config::rngSeed() const                   { return m_data.rngSeed; }
+    bool Config::rngSeedWasFixed() const               { return m_data.rngSeedWasFixed; }
     unsigned int Config::shardCount() const            { return m_data.shardCount; }
     unsigned int Config::shardIndex() const            { return m_data.shardIndex; }
     ColourMode Config::defaultColourMode() const       { return m_data.defaultColourMode; }
@@ -938,7 +989,7 @@ namespace Catch {
 
         if ( bazelOutputFile ) {
             m_data.reporterSpecifications.push_back(
-                { "junit", std::string( bazelOutputFile ), {}, {} } );
+                { "junit", std::string( bazelOutputFile ), {}, {}, {} } );
         }
 
         const auto bazelTestSpec = Detail::getEnv( "TESTBRIDGE_TEST_ONLY" );
@@ -977,6 +1028,7 @@ namespace Catch {
                     << bazelRandomSeed << "') as proper seed.\n";
             } else {
                 m_data.rngSeed = *parsedSeed;
+                m_data.rngSeedWasFixed = true;
             }
         }
     }
@@ -1162,6 +1214,10 @@ namespace Catch {
 #endif
             }
 
+            ITestCaseRegistry& getMutableTestCaseRegistry() override {
+                return m_testCaseRegistry;
+            }
+
         private:
             TestRegistry m_testCaseRegistry;
             ReporterRegistry m_reporterRegistry;
@@ -1217,6 +1273,7 @@ namespace Catch {
                     ReporterConfig( config,
                                     makeStream( spec.outputFilename ),
                                     spec.colourMode,
+                                    spec.verbosity,
                                     spec.customOptions ) );
             }
 
@@ -1233,6 +1290,7 @@ namespace Catch {
                     ReporterConfig( config,
                                     makeStream( reporterSpec.outputFilename ),
                                     reporterSpec.colourMode,
+                                    reporterSpec.verbosity,
                                     reporterSpec.customOptions ) ) );
             }
 
@@ -1303,9 +1361,7 @@ namespace Catch {
         };
 
         void applyFilenamesAsTags() {
-            for (auto const& testInfo : getRegistryHub().getTestCaseRegistry().getAllInfos()) {
-                testInfo->addFilenameTag();
-            }
+            getMutableRegistryHub().getMutableTestCaseRegistry().enableFilenameTags();
         }
 
         // Creates empty file at path. The path must be writable, we do not
@@ -1511,6 +1567,19 @@ namespace Catch {
         CATCH_TRY {
             config(); // Force config to be constructed
 
+            if ( m_config->shardCount() > 1 &&
+                 m_config->runOrder() == TestRunOrder::Randomized &&
+                 !m_config->rngSeedWasFixed() ) {
+                Catch::cerr()
+                    << "Warning: using sharding (--shard-count) with random "
+                       "order (--order rand, the default) and without a fixed "
+                       "numeric --rng-seed does not guarantee disjoint coverage "
+                       "between shard invocations. Pass the same numeric "
+                       "--rng-seed to every shard, or use --order decl or "
+                       "--order lex instead.\n"
+                    << std::flush;
+            }
+
             // We need to retrieve potential Bazel config with the full Config
             // constructor, so we have to create the guard file after it is created.
             setUpGuardFile( m_config->getExitGuardFilePath() );
@@ -2394,7 +2463,7 @@ namespace Catch {
     }
 
     Version const& libraryVersion() {
-        static Version version( 3, 15, 1, "", 0 );
+        static Version version( 3, 16, 0, "", 0 );
         return version;
     }
 
@@ -2541,7 +2610,7 @@ namespace Catch {
                 bool isValid = next();
                 if ( !isValid ) {
                     Detail::throw_generator_exception(
-                        "Coud not jump to Nth element: not enough elements" );
+                        "Could not jump to Nth element: not enough elements" );
                 }
             }
         }
@@ -2591,10 +2660,12 @@ namespace Catch {
         IConfig const* _fullConfig,
         Detail::unique_ptr<IStream> _stream,
         ColourMode colourMode,
+        Verbosity verbosity,
         std::map<std::string, std::string> customOptions ):
         m_stream( CATCH_MOVE(_stream) ),
         m_fullConfig( _fullConfig ),
         m_colourMode( colourMode ),
+        m_verbosity( verbosity ),
         m_customOptions( CATCH_MOVE( customOptions ) ) {}
 
     Detail::unique_ptr<IStream> ReporterConfig::takeStream() && {
@@ -2603,6 +2674,7 @@ namespace Catch {
     }
     IConfig const * ReporterConfig::fullConfig() const { return m_fullConfig; }
     ColourMode ReporterConfig::colourMode() const { return m_colourMode; }
+    Verbosity ReporterConfig::verbosity() const { return m_verbosity; }
 
     std::map<std::string, std::string> const&
     ReporterConfig::customOptions() const {
@@ -3297,9 +3369,11 @@ namespace Catch {
         auto const setRngSeed = [&]( std::string const& seed ) {
                 if( seed == "time" ) {
                     config.rngSeed = generateRandomSeed(GenerateFrom::Time);
+                    config.rngSeedWasFixed = false;
                     return ParserResult::ok(ParseResultType::Matched);
                 } else if (seed == "random-device") {
                     config.rngSeed = generateRandomSeed(GenerateFrom::RandomDevice);
+                    config.rngSeedWasFixed = false;
                     return ParserResult::ok(ParseResultType::Matched);
                 }
 
@@ -3310,6 +3384,7 @@ namespace Catch {
                     return ParserResult::runtimeError( "Could not parse '" + seed + "' as seed" );
                 }
                 config.rngSeed = *parsedSeed;
+                config.rngSeedWasFixed = true;
                 return ParserResult::ok( ParseResultType::Matched );
             };
         auto const setDefaultColourMode = [&]( std::string const& colourMode ) {
@@ -4678,12 +4753,28 @@ namespace Detail {
 
 
 
+#include <cmath>
+#include <locale>
+
 namespace Catch {
 
     namespace {
-        static bool needsEscape( char c ) {
-            return c == '"' || c == '\\' || c == '\b' || c == '\f' ||
-                   c == '\n' || c == '\r' || c == '\t';
+        struct EscapeLUT {
+            bool escape[256] = {};
+            constexpr EscapeLUT() {
+                escape[static_cast<unsigned char>( '"' )] = true;
+                escape[static_cast<unsigned char>( '\\' )] = true;
+                escape[static_cast<unsigned char>( '\b' )] = true;
+                escape[static_cast<unsigned char>( '\f' )] = true;
+                escape[static_cast<unsigned char>( '\n' )] = true;
+                escape[static_cast<unsigned char>( '\r' )] = true;
+                escape[static_cast<unsigned char>( '\t' )] = true;
+            }
+        };
+        static constexpr EscapeLUT escapeLUT{};
+
+        static constexpr bool needsEscape( char c ) {
+            return escapeLUT.escape[static_cast<unsigned char>( c )];
         }
 
         static Catch::StringRef makeEscapeStringRef( char c ) {
@@ -4795,7 +4886,10 @@ namespace Catch {
 
     JsonValueWriter::JsonValueWriter( std::ostream& os,
                                       std::uint64_t indent_level ):
-        m_os{ os }, m_indent_level{ indent_level } {}
+        m_os{ os }, m_indent_level{ indent_level } {
+        // We use C locale so that writing of numerical values is locale-independent.
+        m_sstream.imbue( std::locale::classic() );
+    }
 
     JsonObjectWriter JsonValueWriter::writeObject() && {
         return JsonObjectWriter{ m_os, m_indent_level };
@@ -4809,26 +4903,55 @@ namespace Catch {
         writeImpl( value, true );
     }
 
+    void JsonValueWriter::write( float value ) && {
+        writeFloatingPoint( value );
+    }
+
+    void JsonValueWriter::write( double value ) && {
+        writeFloatingPoint( value );
+    }
+
     void JsonValueWriter::write( bool value ) && {
         writeImpl( value ? "true"_sr : "false"_sr, false );
     }
 
+    template <typename T>
+    void JsonValueWriter::writeFloatingPoint( T value ) {
+        if ( Catch::isnan( value ) ) {
+            writeImpl( "NaN"_sr, false );
+        } else if ( std::isinf( value ) ) {
+            writeImpl( value < 0 ? "-Infinity"_sr : "Infinity"_sr, false );
+        } else {
+            m_sstream << value;
+            writeImpl( m_sstream.str(), false );
+        }
+    }
+
     void JsonValueWriter::writeImpl( Catch::StringRef value, bool quote ) {
-        if ( quote ) { m_os << '"'; }
-        size_t current_start = 0;
-        for ( size_t i = 0; i < value.size(); ++i ) {
-            if ( needsEscape( value[i] ) ) {
-                if ( current_start < i ) {
-                    m_os << value.substr( current_start, i - current_start );
+        // Escaping only makes sense for actual strings, which are passed
+        // with `quote == true`. Non-quoted values are things like bools
+        // and numbers, which cannot create inputs that need escaping.
+        if ( !quote ) {
+            m_os << value;
+        } else {
+            m_os << '"';
+            size_t current_start = 0;
+            for ( size_t i = 0; i < value.size(); ++i ) {
+                if ( needsEscape( value[i] ) ) {
+                    if ( current_start < i ) {
+                        m_os
+                            << value.substr( current_start, i - current_start );
+                    }
+                    m_os << makeEscapeStringRef( value[i] );
+                    current_start = i + 1;
                 }
-                m_os << makeEscapeStringRef( value[i] );
-                current_start = i + 1;
             }
+            if ( current_start < value.size() ) {
+                m_os << value.substr( current_start,
+                                      value.size() - current_start );
+            }
+            m_os << '"';
         }
-        if ( current_start < value.size() ) {
-            m_os << value.substr( current_start, value.size() - current_start );
-        }
-        if ( quote ) { m_os << '"'; }
     }
 
 } // namespace Catch
@@ -5705,6 +5828,18 @@ namespace Catch {
                 return {};
             }
         }
+
+        Optional<Verbosity> stringToVerbosity( StringRef verbosity ) {
+            if (verbosity == "quiet") { return Verbosity::Quiet;
+            } else if ( verbosity == "normal" ) {
+                return Verbosity::Normal;
+            } else if ( verbosity == "high" ) {
+                return Verbosity::High;
+            } else {
+                return {};
+            }
+        }
+
     } // namespace Detail
 
 
@@ -5712,6 +5847,7 @@ namespace Catch {
         return lhs.m_name == rhs.m_name &&
                lhs.m_outputFileName == rhs.m_outputFileName &&
                lhs.m_colourMode == rhs.m_colourMode &&
+               lhs.m_verbosity == rhs.m_verbosity &&
                lhs.m_customOptions == rhs.m_customOptions;
     }
 
@@ -5723,6 +5859,7 @@ namespace Catch {
         std::map<std::string, std::string> kvPairs;
         Optional<std::string> outputFileName;
         Optional<ColourMode> colourMode;
+        Optional<Verbosity> verbosity;
 
         // First part is always reporter name, so we skip it
         for ( size_t i = 1; i < parts.size(); ++i ) {
@@ -5760,6 +5897,12 @@ namespace Catch {
                 if ( !colourMode ) {
                     return {};
                 }
+            } else if ( key == "verbosity" ) {
+                // Duplicated key
+                if ( verbosity ) { return {}; }
+                verbosity = Detail::stringToVerbosity( value );
+                // Parsing failed
+                if ( !verbosity ) { return {}; }
             } else {
                 // Unrecognized option
                 return {};
@@ -5769,6 +5912,7 @@ namespace Catch {
         return ReporterSpec{ CATCH_MOVE( parts[0] ),
                              CATCH_MOVE( outputFileName ),
                              CATCH_MOVE( colourMode ),
+                             CATCH_MOVE( verbosity),
                              CATCH_MOVE( kvPairs ) };
     }
 
@@ -5776,10 +5920,12 @@ ReporterSpec::ReporterSpec(
         std::string name,
         Optional<std::string> outputFileName,
         Optional<ColourMode> colourMode,
+        Optional<Verbosity> verbosity,
         std::map<std::string, std::string> customOptions ):
         m_name( CATCH_MOVE( name ) ),
         m_outputFileName( CATCH_MOVE( outputFileName ) ),
         m_colourMode( CATCH_MOVE( colourMode ) ),
+        m_verbosity( CATCH_MOVE( verbosity ) ),
         m_customOptions( CATCH_MOVE( customOptions ) ) {}
 
 } // namespace Catch
@@ -6016,6 +6162,8 @@ namespace Catch {
                 auto getGenerator() const -> GeneratorBasePtr const& override {
                     return m_generator;
                 }
+
+                bool isFilteredImpl() const override { return m_isFiltered; }
             };
         } // namespace
     }
@@ -6360,17 +6508,6 @@ namespace Catch {
         SourceLineInfo lineInfo,
         Generators::GeneratorBasePtr&& generator ) {
 
-        // TBD: Do we want to avoid the warning if the generator is filtered?
-        if ( m_config->warnAboutInfiniteGenerators() &&
-             !generator->isFinite() ) {
-            // We want the semantics of `FAIL()`, but we inline it
-            // to avoid issues with conditionally prefixed macros
-            INTERNAL_CATCH_MSG( "FAIL",
-                                Catch::ResultWas::ExplicitFailure,
-                                Catch::ResultDisposition::Normal,
-                                "GENERATE() would run infinitely" );
-        }
-
         auto nameAndLoc = TestCaseTracking::NameAndLocation( static_cast<std::string>( generatorName ), lineInfo );
         auto& currentTracker = m_trackerContext.currentTracker();
         assert(
@@ -6383,11 +6520,24 @@ namespace Catch {
                 m_trackerContext,
                 &currentTracker,
                 CATCH_MOVE( generator ) );
-        auto ret = newTracker.get();
+
+        // The warning shouldn't fire if the generator is infinite, **but** filtered down.
+        if ( m_config->warnAboutInfiniteGenerators() &&
+             !newTracker->m_generator->isFinite() &&
+             !newTracker->isFiltered() ) {
+            // We want the semantics of `FAIL()`, but we inline it
+            // to avoid issues with conditionally prefixed macros
+            INTERNAL_CATCH_MSG( "FAIL",
+                                Catch::ResultWas::ExplicitFailure,
+                                Catch::ResultDisposition::Normal,
+                                "GENERATE() would run infinitely" );
+        }
+
+        auto returnPtr = newTracker.get();
         currentTracker.addChild( CATCH_MOVE( newTracker ) );
 
-        ret->open();
-        return ret;
+        returnPtr->open();
+        return returnPtr;
     }
 
     bool RunContext::testForMissingAssertions(Counts& assertions) {
@@ -7182,6 +7332,9 @@ namespace Catch {
 namespace Catch {
 
     namespace {
+        // Picked small-ish number at random
+        static size_t kInitialTestCount = 120;
+
         static void enforceNoDuplicateTestCases(
             std::vector<TestCaseHandle> const& tests ) {
             auto testInfoCmp = []( TestCaseInfo const* lhs,
@@ -7283,17 +7436,26 @@ namespace Catch {
         return getRegistryHub().getTestCaseRegistry().getAllTestsSorted( config );
     }
 
+
+    TestRegistry::TestRegistry() {
+        // We pre-reserve some reasonable number of tests to avoid the
+        // initial geometric growth churning during test registration.
+        m_handles.reserve( kInitialTestCount );
+        m_test_infos.reserve( kInitialTestCount );
+        m_invokers.reserve( kInitialTestCount );
+    }
     TestRegistry::~TestRegistry() = default;
 
     void TestRegistry::registerTest(Detail::unique_ptr<TestCaseInfo> testInfo, Detail::unique_ptr<ITestInvoker> testInvoker) {
         m_handles.emplace_back(testInfo.get(), testInvoker.get());
-        m_viewed_test_infos.push_back(testInfo.get());
-        m_owned_test_infos.push_back(CATCH_MOVE(testInfo));
+        m_test_infos.push_back(CATCH_MOVE(testInfo));
         m_invokers.push_back(CATCH_MOVE(testInvoker));
     }
 
-    std::vector<TestCaseInfo*> const& TestRegistry::getAllInfos() const {
-        return m_viewed_test_infos;
+    void TestRegistry::enableFilenameTags() {
+        for (auto& info : m_test_infos) {
+            info->addFilenameTag();
+        }
     }
 
     std::vector<TestCaseHandle> const& TestRegistry::getAllTests() const {
@@ -7470,6 +7632,28 @@ namespace TestCaseTracking {
         m_ctx.setCurrentTracker( this );
     }
 
+    bool SectionTracker::isFilteredImpl() const {
+        // TBD: This is currently _very_ similar to the block in `isComplete`.
+        //      Is this neccessarily that way, or just accident of current semantics?
+        const size_t filterIndex =
+            m_newStyleFilters ? m_allTrackerDepth : m_sectionOnlyDepth;
+
+        if ( filterIndex < m_filterRef->size() ) {
+            // 1) New style filter must explicitly target section
+            if ( m_newStyleFilters && ( *m_filterRef )[filterIndex].type !=
+                                          PathFilter::For::Section ) {
+                return true;
+            }
+            // 2) Both style filters must match the trimmed name exactly
+            if ( m_trimmed_name !=
+                 StringRef( ( *m_filterRef )[filterIndex].filter ) ) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
     SectionTracker::SectionTracker( NameAndLocation&& nameAndLocation, TrackerContext& ctx, ITracker* parent )
     :   TrackerBase( CATCH_MOVE(nameAndLocation), ctx, parent ),
         m_trimmed_name(trim(StringRef(ITracker::nameAndLocation().name)))
@@ -8961,66 +9145,101 @@ namespace Catch {
 #include <regex>
 
 namespace Catch {
+
+    namespace {
+        constexpr StringRef caseSensitivitySuffix( CaseSensitive caseSensitivity ) {
+            return caseSensitivity == CaseSensitive::Yes
+                       ? StringRef{}
+                       : " (case insensitive)"_sr;
+        }
+    } // namespace
+
 namespace Matchers {
 
-    CasedString::CasedString( std::string const& str, CaseSensitive caseSensitivity )
-    :   m_caseSensitivity( caseSensitivity ),
-        m_str( adjustString( str ) )
-    {}
-    std::string CasedString::adjustString( std::string const& str ) const {
-        return m_caseSensitivity == CaseSensitive::No
-               ? toLower( str )
-               : str;
-    }
-    StringRef CasedString::caseSensitivitySuffix() const {
-        return m_caseSensitivity == CaseSensitive::Yes
-                   ? StringRef()
-                   : " (case insensitive)"_sr;
-    }
+    StringMatcherBase::StringMatcherBase( std::string target,
+                                          StringRef operation,
+                                          CaseSensitive caseSensitivity ):
+        m_target( CATCH_MOVE( target ) ),
+        m_operation( operation ),
+        m_caseSensitivity( caseSensitivity ) {}
 
 
-    StringMatcherBase::StringMatcherBase( StringRef operation, CasedString const& comparator )
-    : m_comparator( comparator ),
-      m_operation( operation ) {
-    }
-
     std::string StringMatcherBase::describe() const {
         std::string description;
-        description.reserve(5 + m_operation.size() + m_comparator.m_str.size() +
-                                    m_comparator.caseSensitivitySuffix().size());
+        description.reserve(5 + m_operation.size() + m_target.size() +
+                                    caseSensitivitySuffix(m_caseSensitivity).size());
         description += m_operation;
         description += ": \"";
-        description += m_comparator.m_str;
+        description += m_target;
         description += '"';
-        description += m_comparator.caseSensitivitySuffix();
+        description += caseSensitivitySuffix(m_caseSensitivity);
         return description;
     }
 
-    StringEqualsMatcher::StringEqualsMatcher( CasedString const& comparator ) : StringMatcherBase( "equals"_sr, comparator ) {}
+
+    StringEqualsMatcher::StringEqualsMatcher( std::string comparator, CaseSensitive caseSensitivity ):
+        StringMatcherBase( CATCH_MOVE( comparator ), "equals"_sr, caseSensitivity ) {}
 
     bool StringEqualsMatcher::match( std::string const& source ) const {
-        return m_comparator.adjustString( source ) == m_comparator.m_str;
+        if (m_caseSensitivity == CaseSensitive::Yes) {
+            return m_target == source;
+        }
+        if (m_target.size() != source.size()) { return false; }
+        Catch::Detail::CaseInsensitiveEqualTo eq;
+        return eq( m_target, source );
     }
 
 
-    StringContainsMatcher::StringContainsMatcher( CasedString const& comparator ) : StringMatcherBase( "contains"_sr, comparator ) {}
+    StringContainsMatcher::StringContainsMatcher(
+        std::string comparator, CaseSensitive caseSensitivity ):
+        StringMatcherBase( CATCH_MOVE( comparator ), "contains"_sr, caseSensitivity ) {}
 
     bool StringContainsMatcher::match( std::string const& source ) const {
-        return contains( m_comparator.adjustString( source ), m_comparator.m_str );
+        if ( m_caseSensitivity == CaseSensitive::Yes ) {
+            return contains( source, m_target );
+        }
+        if ( source.size() < m_target.size() ) { return false; }
+        StringRef as_ref( source );
+        // The worst case of this is O(m*n), which is terrible, BUT:
+        //  * The average case is much better, the worst case only happens rarely
+        //  * We can implement BMH/other better searchers later if it matters
+        Catch::Detail::CaseInsensitiveEqualTo eq;
+        for (size_t i = 0; i < source.size(); ++i) {
+            const auto substr = as_ref.substr( i, m_target.size() );
+            bool found = eq( substr, m_target );
+            if ( found ) { return true; }
+        }
+        return false;
     }
 
 
-    StartsWithMatcher::StartsWithMatcher( CasedString const& comparator ) : StringMatcherBase( "starts with"_sr, comparator ) {}
+    StartsWithMatcher::StartsWithMatcher( std::string comparator,
+                                          CaseSensitive caseSensitivity ):
+        StringMatcherBase( CATCH_MOVE( comparator ), "starts with"_sr, caseSensitivity ) {}
 
     bool StartsWithMatcher::match( std::string const& source ) const {
-        return startsWith( m_comparator.adjustString( source ), m_comparator.m_str );
+        if ( m_caseSensitivity == CaseSensitive::Yes ) {
+            return startsWith( source, m_target );
+        }
+        if (source.size() < m_target.size()) { return false; }
+        Catch::Detail::CaseInsensitiveEqualTo eq;
+        return eq(
+            StringRef( source ).substr( 0, m_target.size() ), m_target );
     }
 
 
-    EndsWithMatcher::EndsWithMatcher( CasedString const& comparator ) : StringMatcherBase( "ends with"_sr, comparator ) {}
+    EndsWithMatcher::EndsWithMatcher( std::string comparator,
+                                      CaseSensitive caseSensitivity ):
+        StringMatcherBase( CATCH_MOVE( comparator ), "ends with"_sr, caseSensitivity ) {}
 
     bool EndsWithMatcher::match( std::string const& source ) const {
-        return endsWith( m_comparator.adjustString( source ), m_comparator.m_str );
+        if ( m_caseSensitivity == CaseSensitive::Yes ) {
+            return endsWith( source, m_target );
+        }
+        if ( source.size() < m_target.size() ) { return false; }
+        Catch::Detail::CaseInsensitiveEqualTo eq;
+        const size_t start_point = source.size() - m_target.size();
+        return eq( StringRef( source ).substr( start_point, m_target.size() ), m_target );
     }
 
 
@@ -9041,21 +9260,21 @@ namespace Matchers {
     }
 
 
-    StringEqualsMatcher Equals( std::string const& str, CaseSensitive caseSensitivity ) {
-        return StringEqualsMatcher( CasedString( str, caseSensitivity) );
+    StringEqualsMatcher Equals( std::string str, CaseSensitive caseSensitivity ) {
+        return StringEqualsMatcher( CATCH_MOVE( str ), caseSensitivity );
     }
-    StringContainsMatcher ContainsSubstring( std::string const& str, CaseSensitive caseSensitivity ) {
-        return StringContainsMatcher( CasedString( str, caseSensitivity) );
+    StringContainsMatcher ContainsSubstring( std::string str, CaseSensitive caseSensitivity ) {
+        return StringContainsMatcher( CATCH_MOVE( str ), caseSensitivity );
     }
-    EndsWithMatcher EndsWith( std::string const& str, CaseSensitive caseSensitivity ) {
-        return EndsWithMatcher( CasedString( str, caseSensitivity) );
+    EndsWithMatcher EndsWith( std::string str, CaseSensitive caseSensitivity ) {
+        return EndsWithMatcher( CATCH_MOVE( str ), caseSensitivity );
     }
-    StartsWithMatcher StartsWith( std::string const& str, CaseSensitive caseSensitivity ) {
-        return StartsWithMatcher( CasedString( str, caseSensitivity) );
+    StartsWithMatcher StartsWith( std::string str, CaseSensitive caseSensitivity ) {
+        return StartsWithMatcher( CATCH_MOVE( str ), caseSensitivity );
     }
 
-    RegexMatcher Matches(std::string const& regex, CaseSensitive caseSensitivity) {
-        return RegexMatcher(regex, caseSensitivity);
+    RegexMatcher Matches(std::string regex, CaseSensitive caseSensitivity) {
+        return RegexMatcher( CATCH_MOVE( regex ), caseSensitivity );
     }
 
 } // namespace Matchers
@@ -9157,6 +9376,7 @@ namespace Catch {
         m_wrapped_stream( CATCH_MOVE(config).takeStream() ),
         m_stream( m_wrapped_stream->stream() ),
         m_colour( makeColourImpl( config.colourMode(), m_wrapped_stream.get() ) ),
+        m_verbosity( config.verbosity() ),
         m_customOptions( config.customOptions() )
     {}
 
@@ -9164,12 +9384,12 @@ namespace Catch {
 
     void ReporterBase::listReporters(
         std::vector<ReporterDescription> const& descriptions ) {
-        defaultListReporters( m_stream, descriptions, m_config->verbosity() );
+        defaultListReporters( m_stream, descriptions, m_verbosity );
     }
 
     void ReporterBase::listListeners(
         std::vector<ListenerDescription> const& descriptions ) {
-        defaultListListeners( m_stream, descriptions, m_config->verbosity() );
+        defaultListListeners( m_stream, descriptions, m_verbosity );
     }
 
     void ReporterBase::listTests(std::vector<TestCaseHandle> const& tests) {
@@ -9177,11 +9397,11 @@ namespace Catch {
                          m_colour.get(),
                          tests,
                          m_config->hasTestFilters(),
-                         m_config->verbosity());
+                         m_verbosity);
     }
 
     void ReporterBase::listTags(std::vector<TagInfo> const& tags) {
-        defaultListTags( m_stream, tags, m_config->hasTestFilters(), m_config->verbosity() );
+        defaultListTags( m_stream, tags, m_config->hasTestFilters(), m_verbosity );
     }
 
 } // namespace Catch
@@ -10631,6 +10851,8 @@ namespace Catch {
 
 namespace Catch {
     namespace {
+        static size_t kJsonOutputVersion = 2;
+
         void writeSourceInfo( JsonObjectWriter& writer,
                               SourceLineInfo const& sourceInfo ) {
             auto source_location_writer =
@@ -10673,7 +10895,7 @@ namespace Catch {
         m_writers.emplace( Writer::Object );
         auto& writer = m_objectWriters.top();
 
-        writer.write( "version"_sr ).write( 1 );
+        writer.write( "version"_sr ).write( kJsonOutputVersion );
 
         {
             auto metadata_writer = writer.write( "metadata"_sr ).writeObject();
@@ -10959,14 +11181,18 @@ namespace Catch {
             auto const& info = test.getTestCaseInfo();
 
             desc_writer.write( "name"_sr ).write( info.name );
-            desc_writer.write( "class-name"_sr ).write( info.className );
-            {
+            if (!info.className.empty()) {
+                desc_writer.write( "class-name"_sr ).write( info.className );
+            }
+            if ( m_verbosity >= Verbosity::Normal ) {
                 auto tag_writer = desc_writer.write( "tags"_sr ).writeArray();
                 for ( auto const& tag : info.tags ) {
                     tag_writer.write( tag.original );
                 }
             }
-            writeSourceInfo( desc_writer, info.lineInfo );
+            if ( m_verbosity >= Verbosity::High) {
+                writeSourceInfo( desc_writer, info.lineInfo );
+            }
         }
     }
     void JsonReporter::listTags( std::vector<TagInfo> const& tags ) {

extras/catch_amalgamated.hpp

@@ -6,8 +6,8 @@
 
 // SPDX-License-Identifier: BSL-1.0
 
-//  Catch v3.15.1
-//  Generated: 2026-06-14 10:51:55.600632
+//  Catch v3.16.0
+//  Generated: 2026-08-25 09:29:22.652020
 //  ----------------------------------------------------------
 //  This file is an amalgamation of multiple different files.
 //  You probably shouldn't edit it directly.
@@ -1317,6 +1317,8 @@ namespace Catch {
         virtual void registerTranslator( Detail::unique_ptr<IExceptionTranslator>&& translator ) = 0;
         virtual void registerTagAlias( std::string const& alias, std::string const& tag, SourceLineInfo const& lineInfo ) = 0;
         virtual void registerStartupException() noexcept = 0;
+
+        virtual ITestCaseRegistry& getMutableTestCaseRegistry() = 0;
     };
 
     IRegistryHub const& getRegistryHub();
@@ -1506,7 +1508,7 @@ namespace Catch {
         } // namespace Detail
 #elif defined(_MSC_VER) || defined(__IAR_SYSTEMS_ICC__)
 
-#if defined(_MSVC_VER)
+#if defined(_MSC_VER)
 #pragma optimize("", off)
 #elif defined(__IAR_SYSTEMS_ICC__)
 // For IAR the pragma only affects the following function
@@ -1543,6 +1545,13 @@ namespace Catch {
         template <typename Fn, typename... Args>
         inline auto invoke_deoptimized(Fn&& fn, Args&&... args) -> std::enable_if_t<std::is_same<void, decltype(fn(args...))>::value> {
             CATCH_FORWARD((fn)) (CATCH_FORWARD(args)...);
+            // In the non-void case, we pass the result through `deoptimize_value`
+            // to force the compiler to keep it. We have no return value here,
+            // but add an optimizer barrier (ideally a memory clobber) to force
+            // the _side effects_ of the loop be visible (e.g. writes to globals).
+            // Note that writes to benchmark-locals can be optimized away, as
+            // we would expect in normal code.
+            Detail::optimizer_barrier();
         }
     } // namespace Benchmark
 } // namespace Catch
@@ -2159,9 +2168,94 @@ namespace Catch {
 #include <exception>
 #include <string>
 #include <cmath>
+#include <type_traits>
 
 namespace Catch {
     namespace Benchmark {
+        namespace Detail {
+            template <typename Clock>
+            ExecutionPlan prepare( const IConfig& cfg,
+                                   Environment env,
+                                   BenchmarkFunction&& fun ) {
+                auto min_time =
+                    env.clock_resolution.mean * Detail::minimum_ticks;
+                auto run_time =
+                    std::max( min_time,
+                              std::chrono::duration_cast<decltype( min_time )>(
+                                  cfg.benchmarkWarmupTime() ) );
+                auto&& test = Detail::run_for_at_least<Clock>(
+                    std::chrono::duration_cast<IDuration>( run_time ), 1, fun );
+                int new_iters = static_cast<int>(
+                    std::ceil( min_time * test.iterations / test.elapsed ) );
+                return { new_iters,
+                         test.elapsed / test.iterations * new_iters *
+                             cfg.benchmarkSamples(),
+                         CATCH_MOVE( fun ),
+                         std::chrono::duration_cast<FDuration>(
+                             cfg.benchmarkWarmupTime() ),
+                         Detail::warmup_iterations };
+            }
+
+            // These are wrappers for their respective function templated
+            // over `default_clock`. This allows outlining the usual use
+            // of the template into single TU and save on compilation costs.
+
+            Environment measure_environment_default();
+            ExecutionPlan prepare_default( const IConfig& cfg,
+                                           Environment env,
+                                           BenchmarkFunction&& fun );
+            std::vector<FDuration> run_plan_default( ExecutionPlan const& plan,
+                                                     const IConfig& cfg,
+                                                     Environment env );
+
+            template <typename Clock>
+            std::enable_if_t<std::is_same<Clock, default_clock>::value,
+                             Environment>
+            measureEnvironmentDispatch() {
+                return measure_environment_default();
+            }
+            template <typename Clock>
+            std::enable_if_t<!std::is_same<Clock, default_clock>::value,
+                             Environment>
+            measureEnvironmentDispatch() {
+                return measure_environment<Clock>();
+            }
+
+            template <typename Clock>
+            std::enable_if_t<std::is_same<Clock, default_clock>::value,
+                             std::vector<FDuration>>
+            runPlanDispatch( ExecutionPlan const& plan,
+                             const IConfig& cfg,
+                             Environment env ) {
+                return run_plan_default( plan, cfg, env );
+            }
+            template <typename Clock>
+            std::enable_if_t<!std::is_same<Clock, default_clock>::value,
+                             std::vector<FDuration>>
+            runPlanDispatch( ExecutionPlan const& plan,
+                             const IConfig& cfg,
+                             Environment env ) {
+                return plan.template run<Clock>( cfg, env );
+            }
+
+            template <typename Clock>
+            std::enable_if_t<std::is_same<Clock, default_clock>::value,
+                             ExecutionPlan>
+            prepareDispatch( const IConfig& cfg,
+                             Environment env,
+                             BenchmarkFunction&& fun ) {
+                return prepare_default( cfg, env, CATCH_MOVE( fun ) );
+            }
+            template <typename Clock>
+            std::enable_if_t<!std::is_same<Clock, default_clock>::value,
+                             ExecutionPlan>
+            prepareDispatch( const IConfig& cfg,
+                             Environment env,
+                             BenchmarkFunction&& fun ) {
+                return prepare<Clock>( cfg, env, CATCH_MOVE( fun ) );
+            }
+        } // namespace Detail
+
         struct Benchmark {
             Benchmark(std::string&& benchmarkName)
                 : name(CATCH_MOVE(benchmarkName)) {}
@@ -2170,27 +2264,18 @@ namespace Catch {
             Benchmark(std::string&& benchmarkName , FUN &&func)
                 : fun(CATCH_MOVE(func)), name(CATCH_MOVE(benchmarkName)) {}
 
-            template <typename Clock>
-            ExecutionPlan prepare(const IConfig &cfg, Environment env) {
-                auto min_time = env.clock_resolution.mean * Detail::minimum_ticks;
-                auto run_time = std::max(min_time, std::chrono::duration_cast<decltype(min_time)>(cfg.benchmarkWarmupTime()));
-                auto&& test = Detail::run_for_at_least<Clock>(std::chrono::duration_cast<IDuration>(run_time), 1, fun);
-                int new_iters = static_cast<int>(std::ceil(min_time * test.iterations / test.elapsed));
-                return { new_iters, test.elapsed / test.iterations * new_iters * cfg.benchmarkSamples(), CATCH_MOVE(fun), std::chrono::duration_cast<FDuration>(cfg.benchmarkWarmupTime()), Detail::warmup_iterations };
-            }
-
             template <typename Clock = default_clock>
             void run() {
                 static_assert( Clock::is_steady,
                                "Benchmarking clock should be steady" );
                 auto const* cfg = getCurrentContext().getConfig();
 
-                auto env = Detail::measure_environment<Clock>();
+                auto env = Detail::measureEnvironmentDispatch<Clock>();
 
                 getResultCapture().benchmarkPreparing(name);
                 CATCH_TRY{
                     auto plan = user_code([&] {
-                        return prepare<Clock>(*cfg, env);
+                        return Detail::prepareDispatch<Clock>( *cfg, env, CATCH_MOVE(fun) );
                     });
 
                     BenchmarkInfo info {
@@ -2206,7 +2291,7 @@ namespace Catch {
                     getResultCapture().benchmarkStarting(info);
 
                     auto samples = user_code([&] {
-                        return plan.template run<Clock>(*cfg, env);
+                        return Detail::runPlanDispatch<Clock>( plan, *cfg, env );
                     });
 
                     auto analysis = Detail::analyse(*cfg, samples.data(), samples.data() + samples.size());
@@ -3736,6 +3821,7 @@ namespace Catch {
         std::vector<std::string> splitReporterSpec( StringRef reporterSpec );
 
         Optional<ColourMode> stringToColourMode( StringRef colourMode );
+        Optional<Verbosity> stringToVerbosity( StringRef verbosity );
     }
 
     /**
@@ -3750,6 +3836,7 @@ namespace Catch {
         std::string m_name;
         Optional<std::string> m_outputFileName;
         Optional<ColourMode> m_colourMode;
+        Optional<Verbosity> m_verbosity;
         std::map<std::string, std::string> m_customOptions;
 
         friend bool operator==( ReporterSpec const& lhs,
@@ -3764,6 +3851,7 @@ namespace Catch {
             std::string name,
             Optional<std::string> outputFileName,
             Optional<ColourMode> colourMode,
+            Optional<Verbosity> verbosity,
             std::map<std::string, std::string> customOptions );
 
         std::string const& name() const { return m_name; }
@@ -3774,13 +3862,15 @@ namespace Catch {
 
         Optional<ColourMode> const& colourMode() const { return m_colourMode; }
 
+        Optional<Verbosity> const& verbosity() const { return m_verbosity; }
+
         std::map<std::string, std::string> const& customOptions() const {
             return m_customOptions;
         }
     };
 
     /**
-     * Parses provided reporter spec string into
+     * Parses provided reporter spec string into actual `ReporterSpec`
      *
      * Returns empty optional on errors, e.g.
      *  * field that is not first and not a key+value pair
@@ -3813,6 +3903,7 @@ namespace Catch {
         std::string name;
         std::string outputFilename;
         ColourMode colourMode;
+        Verbosity verbosity;
         std::map<std::string, std::string> customOptions;
         friend bool operator==( ProcessedReporterSpec const& lhs,
                                 ProcessedReporterSpec const& rhs );
@@ -3840,6 +3931,7 @@ namespace Catch {
 
         int abortAfter = -1;
         uint32_t rngSeed = generateRandomSeed(GenerateFrom::Default);
+        bool rngSeedWasFixed = false;
 
         unsigned int shardCount = 1;
         unsigned int shardIndex = 0;
@@ -3911,6 +4003,7 @@ namespace Catch {
         double minDuration() const override;
         TestRunOrder runOrder() const override;
         uint32_t rngSeed() const override;
+        bool rngSeedWasFixed() const;
         unsigned int shardCount() const override;
         unsigned int shardIndex() const override;
         ColourMode defaultColourMode() const override;
@@ -6624,6 +6717,51 @@ namespace Catch {
         struct priority_tag : priority_tag<N - 1> {};
         template <>
         struct priority_tag<0> {};
+
+        // This is a bunch of helpers for the templated test case handling.
+        // They should live elsewhere in the long run, but as an in-between
+        // step we toss them all here.
+        template <typename...> struct TypeList {};
+        template <typename... Ts>
+        constexpr auto get_wrapper( priority_tag<1> ) noexcept -> TypeList<Ts...> { return {}; }
+        template <template <typename...> class...> struct TemplateTypeList {};
+        // Clang 20 and 21 cannot handle an explicitly specified all-pack
+        // template-template parameter here ("conflicting deduction" regression,
+        // llvm/llvm-project#130778; fixed for Clang 22).
+        // Remove get_template_wrapper once Clang 21 is no longer supported.
+        template <template <typename...> class C, template <typename...> class... Cs>
+        constexpr auto get_template_wrapper( priority_tag<1> ) noexcept -> TemplateTypeList<C, Cs...> { return {}; }
+
+        template <typename...>
+        struct append;
+        template <typename T>
+        struct append<T> { using type = T; };
+        template <template <typename...> class L1, typename... E1, template <typename...> class L2, typename... E2, typename... Rest>
+        struct append<L1<E1...>, L2<E2...>, Rest...> { using type = typename append<L1<E1..., E2...>, Rest...>::type; };
+        template <template <typename...> class L1, typename... E1, typename... Rest>
+        struct append<L1<E1...>, TypeList<mpl_::na>, Rest...> { using type = L1<E1...>; };
+
+        template <template <typename...> class, typename>
+        struct convert;
+        template <template <typename...> class Final, template <typename...> class List, typename... Ts>
+        struct convert<Final, List<Ts...>> { using type = typename append<Final<>, TypeList<Ts>...>::type; };
+
+        // These are helpers for the PRODUCT templated test cases.
+        // Note that the _SIG macros (for NTTPs) also use specializations
+        // of these, but they have to use their own instances due to needing
+        // per-sig specializations and we have to keep these in their own
+        // unnamed namespace.
+        template <typename...>
+        struct rewrap;
+        template <template <typename...> class Container, template <typename...> class List, typename... elems>
+        struct rewrap<TemplateTypeList<Container>, List<elems...>> { using type = TypeList<Container<elems...>>; };
+        template <template <typename...> class Container, template <typename...> class List, class... Elems, typename... Elements>
+        struct rewrap<TemplateTypeList<Container>, List<Elems...>, Elements...> { using type = typename append<TypeList<Container<Elems...>>, typename rewrap<TemplateTypeList<Container>, Elements...>::type>::type; };
+
+        template <template <typename...> class, typename...>
+        struct create;
+        template <template <typename...> class Final, template <typename...> class... Containers, typename... Types>
+        struct create<Final, TemplateTypeList<Containers...>, TypeList<Types...>> { using type = typename append<Final<>, typename rewrap<TemplateTypeList<Containers>, Types...>::type...>::type; };
     }
 }
 
@@ -6710,46 +6848,42 @@ namespace Catch {
 
 #define INTERNAL_CATCH_VA_NARGS_IMPL(_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, N, ...) N
 
-#define INTERNAL_CATCH_TYPE_GEN\
-    template<typename...> struct TypeList {};\
-    template<typename... Ts>\
-    constexpr auto get_wrapper(Catch::Detail::priority_tag<1>) noexcept -> TypeList<Ts...> { return {}; }\
-    template<template<typename...> class...> struct TemplateTypeList{};\
-    template<template<typename...> class...Cs>\
-    constexpr auto get_wrapper(Catch::Detail::priority_tag<1>) noexcept -> TemplateTypeList<Cs...> { return {}; }\
-    template<typename...>\
-    struct append;\
-    template<typename...>\
-    struct rewrap;\
-    template<template<typename...> class, typename...>\
-    struct create;\
-    template<template<typename...> class, typename>\
-    struct convert;\
-    \
-    template<typename T> \
-    struct append<T> { using type = T; };\
-    template< template<typename...> class L1, typename...E1, template<typename...> class L2, typename...E2, typename...Rest>\
-    struct append<L1<E1...>, L2<E2...>, Rest...> { using type = typename append<L1<E1...,E2...>, Rest...>::type; };\
-    template< template<typename...> class L1, typename...E1, typename...Rest>\
-    struct append<L1<E1...>, TypeList<mpl_::na>, Rest...> { using type = L1<E1...>; };\
+#define INTERNAL_CATCH_TYPE_GEN \
+    /* We moved these into a central location and no longer create them
+       in each templated test's unnamed namespace, but we pull them in
+       with using to avoid qualifying all the references. */ \
+    using Catch::Detail::TypeList;                     \
+    using Catch::Detail::get_wrapper;                  \
+    using Catch::Detail::TemplateTypeList;             \
+    using Catch::Detail::get_template_wrapper;         \
+    using Catch::Detail::append;                       \
+    using Catch::Detail::convert;
+
+// This stamps out the per test case specializations of wrapper handlers
+// for _SIG (NTTP) macros inside their own namespace, so they can add
+// their required specializations
+#define INTERNAL_CATCH_NTTP_1( signature, ... ) \
+    template<INTERNAL_CATCH_REMOVE_PARENS(signature)> struct Nttp{};\
+    template<INTERNAL_CATCH_REMOVE_PARENS(signature)>\
+    constexpr auto get_wrapper(Catch::Detail::priority_tag<0>) noexcept -> Nttp<__VA_ARGS__> { return {}; } \
+    template<template<INTERNAL_CATCH_REMOVE_PARENS(signature)> class...> struct NttpTemplateTypeList{};\
+    template<template<INTERNAL_CATCH_REMOVE_PARENS(signature)> class C, template<INTERNAL_CATCH_REMOVE_PARENS(signature)> class...Cs>\
+    constexpr auto get_template_wrapper(Catch::Detail::priority_tag<0>) noexcept -> NttpTemplateTypeList<C, Cs...> { return {}; }
+
+// This stamps out the per test case specializations of type-product
+// machinery for the NTTP product macros.
+#define INTERNAL_CATCH_NTTP_REWRAP_1( signature, ... ) \
+    template<typename...>                              \
+    struct rewrap;                                     \
+    template<template<typename...> class, typename...> \
+    struct create;                                     \
     \
     template< template<typename...> class Container, template<typename...> class List, typename...elems>\
     struct rewrap<TemplateTypeList<Container>, List<elems...>> { using type = TypeList<Container<elems...>>; };\
     template< template<typename...> class Container, template<typename...> class List, class...Elems, typename...Elements>\
     struct rewrap<TemplateTypeList<Container>, List<Elems...>, Elements...> { using type = typename append<TypeList<Container<Elems...>>, typename rewrap<TemplateTypeList<Container>, Elements...>::type>::type; };\
-    \
     template<template <typename...> class Final, template< typename...> class...Containers, typename...Types>\
     struct create<Final, TemplateTypeList<Containers...>, TypeList<Types...>> { using type = typename append<Final<>, typename rewrap<TemplateTypeList<Containers>, Types...>::type...>::type; };\
-    template<template <typename...> class Final, template <typename...> class List, typename...Ts>\
-    struct convert<Final, List<Ts...>> { using type = typename append<Final<>,TypeList<Ts>...>::type; };
-
-#define INTERNAL_CATCH_NTTP_1(signature, ...)\
-    template<INTERNAL_CATCH_REMOVE_PARENS(signature)> struct Nttp{};\
-    template<INTERNAL_CATCH_REMOVE_PARENS(signature)>\
-    constexpr auto get_wrapper(Catch::Detail::priority_tag<0>) noexcept -> Nttp<__VA_ARGS__> { return {}; } \
-    template<template<INTERNAL_CATCH_REMOVE_PARENS(signature)> class...> struct NttpTemplateTypeList{};\
-    template<template<INTERNAL_CATCH_REMOVE_PARENS(signature)> class...Cs>\
-    constexpr auto get_wrapper(Catch::Detail::priority_tag<0>) noexcept -> NttpTemplateTypeList<Cs...> { return {}; } \
     \
     template< template<INTERNAL_CATCH_REMOVE_PARENS(signature)> class Container, template<INTERNAL_CATCH_REMOVE_PARENS(signature)> class List, INTERNAL_CATCH_REMOVE_PARENS(signature)>\
     struct rewrap<NttpTemplateTypeList<Container>, List<__VA_ARGS__>> { using type = TypeList<Container<__VA_ARGS__>>; };\
@@ -6826,7 +6960,9 @@ namespace Catch {
 
 #ifndef CATCH_CONFIG_TRADITIONAL_MSVC_PREPROCESSOR
 #define INTERNAL_CATCH_NTTP_0
+#define INTERNAL_CATCH_NTTP_0_REWRAP using Catch::Detail::rewrap; using Catch::Detail::create;
 #define INTERNAL_CATCH_NTTP_GEN(...) INTERNAL_CATCH_VA_NARGS_IMPL(__VA_ARGS__, INTERNAL_CATCH_NTTP_1(__VA_ARGS__), INTERNAL_CATCH_NTTP_1(__VA_ARGS__), INTERNAL_CATCH_NTTP_1(__VA_ARGS__), INTERNAL_CATCH_NTTP_1(__VA_ARGS__), INTERNAL_CATCH_NTTP_1(__VA_ARGS__), INTERNAL_CATCH_NTTP_1( __VA_ARGS__), INTERNAL_CATCH_NTTP_1( __VA_ARGS__), INTERNAL_CATCH_NTTP_1( __VA_ARGS__), INTERNAL_CATCH_NTTP_1( __VA_ARGS__),INTERNAL_CATCH_NTTP_1( __VA_ARGS__), INTERNAL_CATCH_NTTP_0)
+#define INTERNAL_CATCH_NTTP_REWRAP_GEN(...) INTERNAL_CATCH_VA_NARGS_IMPL(__VA_ARGS__, INTERNAL_CATCH_NTTP_REWRAP_1(__VA_ARGS__), INTERNAL_CATCH_NTTP_REWRAP_1(__VA_ARGS__), INTERNAL_CATCH_NTTP_REWRAP_1(__VA_ARGS__), INTERNAL_CATCH_NTTP_REWRAP_1(__VA_ARGS__), INTERNAL_CATCH_NTTP_REWRAP_1(__VA_ARGS__), INTERNAL_CATCH_NTTP_REWRAP_1( __VA_ARGS__), INTERNAL_CATCH_NTTP_REWRAP_1( __VA_ARGS__), INTERNAL_CATCH_NTTP_REWRAP_1( __VA_ARGS__), INTERNAL_CATCH_NTTP_REWRAP_1( __VA_ARGS__),INTERNAL_CATCH_NTTP_REWRAP_1( __VA_ARGS__), INTERNAL_CATCH_NTTP_0_REWRAP)
 #define INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD(TestName, ...) INTERNAL_CATCH_VA_NARGS_IMPL( "dummy", __VA_ARGS__, INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD_X,INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD_X,INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD_X,INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD1, INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD0)(TestName, __VA_ARGS__)
 #define INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD(TestName, ClassName, ...) INTERNAL_CATCH_VA_NARGS_IMPL( "dummy", __VA_ARGS__, INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD_X,INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD_X,INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD_X,INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD1, INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD0)(TestName, ClassName, __VA_ARGS__)
 #define INTERNAL_CATCH_NTTP_REG_METHOD_GEN(TestName, ...) INTERNAL_CATCH_VA_NARGS_IMPL( "dummy", __VA_ARGS__, INTERNAL_CATCH_NTTP_REGISTER_METHOD, INTERNAL_CATCH_NTTP_REGISTER_METHOD, INTERNAL_CATCH_NTTP_REGISTER_METHOD, INTERNAL_CATCH_NTTP_REGISTER_METHOD, INTERNAL_CATCH_NTTP_REGISTER_METHOD, INTERNAL_CATCH_NTTP_REGISTER_METHOD, INTERNAL_CATCH_NTTP_REGISTER_METHOD, INTERNAL_CATCH_NTTP_REGISTER_METHOD, INTERNAL_CATCH_NTTP_REGISTER_METHOD, INTERNAL_CATCH_NTTP_REGISTER_METHOD0, INTERNAL_CATCH_NTTP_REGISTER_METHOD0)(TestName, __VA_ARGS__)
@@ -6836,7 +6972,9 @@ namespace Catch {
 #define INTERNAL_CATCH_REMOVE_PARENS_GEN(...) INTERNAL_CATCH_VA_NARGS_IMPL(__VA_ARGS__, INTERNAL_CATCH_REMOVE_PARENS_11_ARG,INTERNAL_CATCH_REMOVE_PARENS_10_ARG,INTERNAL_CATCH_REMOVE_PARENS_9_ARG,INTERNAL_CATCH_REMOVE_PARENS_8_ARG,INTERNAL_CATCH_REMOVE_PARENS_7_ARG,INTERNAL_CATCH_REMOVE_PARENS_6_ARG,INTERNAL_CATCH_REMOVE_PARENS_5_ARG,INTERNAL_CATCH_REMOVE_PARENS_4_ARG,INTERNAL_CATCH_REMOVE_PARENS_3_ARG,INTERNAL_CATCH_REMOVE_PARENS_2_ARG,INTERNAL_CATCH_REMOVE_PARENS_1_ARG)(__VA_ARGS__)
 #else
 #define INTERNAL_CATCH_NTTP_0(signature)
+#define INTERNAL_CATCH_NTTP_0_REWRAP(signature) using Catch::Detail::rewrap; using Catch::Detail::create;
 #define INTERNAL_CATCH_NTTP_GEN(...) INTERNAL_CATCH_EXPAND_VARGS(INTERNAL_CATCH_VA_NARGS_IMPL(__VA_ARGS__, INTERNAL_CATCH_NTTP_1, INTERNAL_CATCH_NTTP_1, INTERNAL_CATCH_NTTP_1, INTERNAL_CATCH_NTTP_1, INTERNAL_CATCH_NTTP_1, INTERNAL_CATCH_NTTP_1, INTERNAL_CATCH_NTTP_1, INTERNAL_CATCH_NTTP_1, INTERNAL_CATCH_NTTP_1,INTERNAL_CATCH_NTTP_1, INTERNAL_CATCH_NTTP_0)( __VA_ARGS__))
+#define INTERNAL_CATCH_NTTP_REWRAP_GEN(...) INTERNAL_CATCH_EXPAND_VARGS(INTERNAL_CATCH_VA_NARGS_IMPL(__VA_ARGS__, INTERNAL_CATCH_NTTP_REWRAP_1, INTERNAL_CATCH_NTTP_REWRAP_1, INTERNAL_CATCH_NTTP_REWRAP_1, INTERNAL_CATCH_NTTP_REWRAP_1, INTERNAL_CATCH_NTTP_REWRAP_1, INTERNAL_CATCH_NTTP_REWRAP_1, INTERNAL_CATCH_NTTP_REWRAP_1, INTERNAL_CATCH_NTTP_REWRAP_1, INTERNAL_CATCH_NTTP_REWRAP_1,INTERNAL_CATCH_NTTP_REWRAP_1, INTERNAL_CATCH_NTTP_0_REWRAP)( __VA_ARGS__))
 #define INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD(TestName, ...) INTERNAL_CATCH_EXPAND_VARGS(INTERNAL_CATCH_VA_NARGS_IMPL( "dummy", __VA_ARGS__, INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD_X,INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD_X,INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD_X,INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD1, INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD0)(TestName, __VA_ARGS__))
 #define INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD(TestName, ClassName, ...) INTERNAL_CATCH_EXPAND_VARGS(INTERNAL_CATCH_VA_NARGS_IMPL( "dummy", __VA_ARGS__, INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD_X,INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD_X,INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD_X,INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD1, INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD0)(TestName, ClassName, __VA_ARGS__))
 #define INTERNAL_CATCH_NTTP_REG_METHOD_GEN(TestName, ...) INTERNAL_CATCH_EXPAND_VARGS(INTERNAL_CATCH_VA_NARGS_IMPL( "dummy", __VA_ARGS__, INTERNAL_CATCH_NTTP_REGISTER_METHOD, INTERNAL_CATCH_NTTP_REGISTER_METHOD, INTERNAL_CATCH_NTTP_REGISTER_METHOD, INTERNAL_CATCH_NTTP_REGISTER_METHOD, INTERNAL_CATCH_NTTP_REGISTER_METHOD, INTERNAL_CATCH_NTTP_REGISTER_METHOD, INTERNAL_CATCH_NTTP_REGISTER_METHOD, INTERNAL_CATCH_NTTP_REGISTER_METHOD, INTERNAL_CATCH_NTTP_REGISTER_METHOD, INTERNAL_CATCH_NTTP_REGISTER_METHOD0, INTERNAL_CATCH_NTTP_REGISTER_METHOD0)(TestName, __VA_ARGS__))
@@ -6961,6 +7099,7 @@ namespace Catch {
         namespace INTERNAL_CATCH_MAKE_NAMESPACE(TestName) {                                     \
             INTERNAL_CATCH_TYPE_GEN                                                  \
             INTERNAL_CATCH_NTTP_GEN(INTERNAL_CATCH_REMOVE_PARENS(Signature))         \
+            INTERNAL_CATCH_NTTP_REWRAP_GEN(INTERNAL_CATCH_REMOVE_PARENS(Signature))  \
             template<typename... Types>                               \
             struct TestName {                                         \
                 void reg_tests() {                                          \
@@ -6973,7 +7112,7 @@ namespace Catch {
                 }                                                     \
             };                                                        \
             static const int INTERNAL_CATCH_UNIQUE_NAME( globalRegistrar ) = [](){ \
-                using TestInit = typename create<TestName, decltype(get_wrapper<INTERNAL_CATCH_REMOVE_PARENS(TmplTypes)>(Catch::Detail::priority_tag<1>{})), TypeList<INTERNAL_CATCH_MAKE_TYPE_LISTS_FROM_TYPES(INTERNAL_CATCH_REMOVE_PARENS(TypesList))>>::type; \
+                using TestInit = typename create<TestName, decltype(get_template_wrapper<INTERNAL_CATCH_REMOVE_PARENS(TmplTypes)>(Catch::Detail::priority_tag<1>{})), TypeList<INTERNAL_CATCH_MAKE_TYPE_LISTS_FROM_TYPES(INTERNAL_CATCH_REMOVE_PARENS(TypesList))>>::type; \
                 TestInit t;                                           \
                 t.reg_tests();                                        \
                 return 0;                                             \
@@ -7057,7 +7196,7 @@ namespace Catch {
             static const int INTERNAL_CATCH_UNIQUE_NAME( globalRegistrar ) = [](){\
                 TestNameClass<INTERNAL_CATCH_MAKE_TYPE_LISTS_FROM_TYPES(__VA_ARGS__)>();\
                 return 0;\
-        }();\
+            }();\
         }\
         }\
         CATCH_INTERNAL_STOP_WARNINGS_SUPPRESSION \
@@ -7093,6 +7232,7 @@ namespace Catch {
     namespace INTERNAL_CATCH_MAKE_NAMESPACE(TestNameClass) {\
         INTERNAL_CATCH_TYPE_GEN                  \
         INTERNAL_CATCH_NTTP_GEN(INTERNAL_CATCH_REMOVE_PARENS(Signature))\
+        INTERNAL_CATCH_NTTP_REWRAP_GEN(INTERNAL_CATCH_REMOVE_PARENS(Signature))\
         template<typename...Types>\
         struct TestNameClass{\
             void reg_tests(){\
@@ -7105,7 +7245,7 @@ namespace Catch {
             }\
         };\
         static const int INTERNAL_CATCH_UNIQUE_NAME( globalRegistrar ) = [](){\
-            using TestInit = typename create<TestNameClass, decltype(get_wrapper<INTERNAL_CATCH_REMOVE_PARENS(TmplTypes)>(Catch::Detail::priority_tag<1>{})), TypeList<INTERNAL_CATCH_MAKE_TYPE_LISTS_FROM_TYPES(INTERNAL_CATCH_REMOVE_PARENS(TypesList))>>::type;\
+            using TestInit = typename create<TestNameClass, decltype(get_template_wrapper<INTERNAL_CATCH_REMOVE_PARENS(TmplTypes)>(Catch::Detail::priority_tag<1>{})), TypeList<INTERNAL_CATCH_MAKE_TYPE_LISTS_FROM_TYPES(INTERNAL_CATCH_REMOVE_PARENS(TypesList))>>::type;\
             TestInit t;\
             t.reg_tests();\
             return 0;\
@@ -7484,6 +7624,8 @@ namespace Catch {
                     return m_translateFunction( ex );
                 }
 #else
+                (void)it;
+                (void)itEnd;
                 return "You should never get here!";
 #endif
             }
@@ -7569,8 +7711,8 @@ namespace Catch {
 #define CATCH_VERSION_MACROS_HPP_INCLUDED
 
 #define CATCH_VERSION_MAJOR 3
-#define CATCH_VERSION_MINOR 15
-#define CATCH_VERSION_PATCH 1
+#define CATCH_VERSION_MINOR 16
+#define CATCH_VERSION_PATCH 0
 
 #endif // CATCH_VERSION_MACROS_HPP_INCLUDED
 
@@ -7826,7 +7968,7 @@ namespace Generators {
         void skipToNthElementImpl( std::size_t n ) override {
             if ( n >= m_values.size() ) {
                 Detail::throw_generator_exception(
-                    "Coud not jump to Nth element: not enough elements" );
+                    "Could not jump to Nth element: not enough elements" );
             }
             m_idx = n;
         }
@@ -7910,8 +8052,7 @@ namespace Generators {
 
         bool isFinite() const override {
             for (auto const& gen : m_generators) {
-                if (!gen.isFinite()) { return false;
-                }
+                if (!gen.isFinite()) { return false; }
             }
             return true;
         }
@@ -8010,7 +8151,7 @@ namespace Generators {
         void skipToNthElementImpl( std::size_t n ) override {
             if ( n >= m_target ) {
                 Detail::throw_generator_exception(
-                    "Coud not jump to Nth element: not enough elements" );
+                    "Could not jump to Nth element: not enough elements" );
             }
 
             m_generator.skipToNthElement( n );
@@ -9158,6 +9299,7 @@ namespace Catch {
         ReporterConfig( IConfig const* _fullConfig,
                         Detail::unique_ptr<IStream> _stream,
                         ColourMode colourMode,
+                        Verbosity verbosity,
                         std::map<std::string, std::string> customOptions );
 
         ReporterConfig( ReporterConfig&& ) = default;
@@ -9167,12 +9309,14 @@ namespace Catch {
         Detail::unique_ptr<IStream> takeStream() &&;
         IConfig const* fullConfig() const;
         ColourMode colourMode() const;
+        Verbosity verbosity() const;
         std::map<std::string, std::string> const& customOptions() const;
 
     private:
         Detail::unique_ptr<IStream> m_stream;
         IConfig const* m_fullConfig;
         ColourMode m_colourMode;
+        Verbosity m_verbosity;
         std::map<std::string, std::string> m_customOptions;
     };
 
@@ -9425,8 +9569,7 @@ namespace Catch {
     class ITestCaseRegistry {
     public:
         virtual ~ITestCaseRegistry(); // = default
-        // TODO: this exists only for adding filenames to test cases -- let's expose this in a saner way later
-        virtual std::vector<TestCaseInfo* > const& getAllInfos() const = 0;
+        virtual void enableFilenameTags() = 0;
         virtual std::vector<TestCaseHandle> const& getAllTests() const = 0;
         virtual std::vector<TestCaseHandle> const& getAllTestsSorted( IConfig const& config ) const = 0;
     };
@@ -10308,11 +10451,19 @@ namespace Catch {
             writeImpl( value, !std::is_arithmetic<T>::value );
         }
         void write( StringRef value ) &&;
+        void write( float value ) &&;
+        void write( double value ) &&;
         void write( bool value ) &&;
 
     private:
         void writeImpl( StringRef value, bool quote );
 
+        // Helper to deal with non-finite floating point values, which
+        // are not standard JSON, but we use JS/Python/etc. approach of
+        // emitting `NaN`, `Infinity`, `-Infinity` as number(like).
+        template <typename T>
+        void writeFloatingPoint( T value );
+
         // Without this SFINAE, this overload is a better match
         // for `std::string`, `char const*`, `char const[N]` args.
         // While it would still work, it would cause code bloat
@@ -10657,6 +10808,8 @@ namespace TestCaseTracking {
 
         using Children = std::vector<ITrackerPtr>;
 
+        virtual bool isFilteredImpl() const = 0;
+
     protected:
         enum CycleState {
             NotStarted,
@@ -10754,6 +10907,20 @@ namespace TestCaseTracking {
          * for internal debug checks.
          */
         virtual bool isGeneratorTracker() const;
+
+        /**
+         * Returns true if the concrete tracker instance has a filter that applies to it.
+         */
+        bool isFiltered() const {
+            // Fast path: are there even filters for tracker in this position?
+            const size_t filter_depth =
+                m_newStyleFilters ? m_allTrackerDepth : m_sectionOnlyDepth;
+            if ( m_filterRef->size() <= filter_depth ) { return false; }
+
+            // Slow path: If there are filters, ask the concrete tracker.
+            //            This handles things like match-all filters for that tracker.
+            return isFilteredImpl();
+        }
     };
 
     class TrackerContext {
@@ -10809,6 +10976,8 @@ namespace TestCaseTracking {
         // to not own the name, the name still has to outlive the `ITracker` parent, so
         // this should still be safe.
         StringRef m_trimmed_name;
+
+        bool isFilteredImpl() const override;
     public:
         SectionTracker( NameAndLocation&& nameAndLocation, TrackerContext& ctx, ITracker* parent );
 
@@ -11263,20 +11432,20 @@ namespace Catch {
     class TestRegistry final : public ITestCaseRegistry {
     public:
         void registerTest( Detail::unique_ptr<TestCaseInfo> testInfo, Detail::unique_ptr<ITestInvoker> testInvoker );
+        void enableFilenameTags() override;
 
-        std::vector<TestCaseInfo*> const& getAllInfos() const override;
         std::vector<TestCaseHandle> const& getAllTests() const override;
         std::vector<TestCaseHandle> const& getAllTestsSorted( IConfig const& config ) const override;
 
+        TestRegistry();
         ~TestRegistry() override; // = default
 
     private:
-        std::vector<Detail::unique_ptr<TestCaseInfo>> m_owned_test_infos;
-        // Keeps a materialized vector for `getAllInfos`.
-        // We should get rid of that eventually (see interface note)
-        std::vector<TestCaseInfo*> m_viewed_test_infos;
-
+        // Owns the test infos for handles
+        std::vector<Detail::unique_ptr<TestCaseInfo>> m_test_infos;
+        // Owns the test invokers for handles
         std::vector<Detail::unique_ptr<ITestInvoker>> m_invokers;
+
         std::vector<TestCaseHandle> m_handles;
         mutable TestRunOrder m_currentSortOrder = TestRunOrder::Declared;
         mutable std::vector<TestCaseHandle> m_sortedFunctions;
@@ -13274,44 +13443,40 @@ namespace Catch {
 namespace Catch {
 namespace Matchers {
 
-    struct CasedString {
-        CasedString( std::string const& str, CaseSensitive caseSensitivity );
-        std::string adjustString( std::string const& str ) const;
-        StringRef caseSensitivitySuffix() const;
-
-        CaseSensitive m_caseSensitivity;
-        std::string m_str;
-    };
-
     class StringMatcherBase : public MatcherBase<std::string> {
     protected:
-        CasedString m_comparator;
+        std::string m_target;
         StringRef m_operation;
+        CaseSensitive m_caseSensitivity;
 
+        StringMatcherBase( std::string target,
+                           StringRef operation,
+                           CaseSensitive caseSensitivity );
     public:
-        StringMatcherBase( StringRef operation,
-                           CasedString const& comparator );
         std::string describe() const override;
     };
 
     class StringEqualsMatcher final : public StringMatcherBase {
     public:
-        StringEqualsMatcher( CasedString const& comparator );
+        StringEqualsMatcher( std::string comparator, CaseSensitive caseSensitivity );
         bool match( std::string const& source ) const override;
     };
     class StringContainsMatcher final : public StringMatcherBase {
     public:
-        StringContainsMatcher( CasedString const& comparator );
+        StringContainsMatcher( std::string comparator,
+                               CaseSensitive caseSensitivity );
         bool match( std::string const& source ) const override;
     };
     class StartsWithMatcher final : public StringMatcherBase {
     public:
-        StartsWithMatcher( CasedString const& comparator );
+        StartsWithMatcher( std::string comparator,
+                           CaseSensitive caseSensitivity );
         bool match( std::string const& source ) const override;
     };
     class EndsWithMatcher final : public StringMatcherBase {
     public:
-        EndsWithMatcher( CasedString const& comparator );
+        EndsWithMatcher( std::string comparator,
+                         CaseSensitive caseSensitivity );
         bool match( std::string const& source ) const override;
     };
 
@@ -13326,15 +13491,15 @@ namespace Matchers {
     };
 
     //! Creates matcher that accepts strings that are exactly equal to `str`
-    StringEqualsMatcher Equals( std::string const& str, CaseSensitive caseSensitivity = CaseSensitive::Yes );
+    StringEqualsMatcher Equals( std::string str, CaseSensitive caseSensitivity = CaseSensitive::Yes );
     //! Creates matcher that accepts strings that contain `str`
-    StringContainsMatcher ContainsSubstring( std::string const& str, CaseSensitive caseSensitivity = CaseSensitive::Yes );
+    StringContainsMatcher ContainsSubstring( std::string str, CaseSensitive caseSensitivity = CaseSensitive::Yes );
     //! Creates matcher that accepts strings that _end_ with `str`
-    EndsWithMatcher EndsWith( std::string const& str, CaseSensitive caseSensitivity = CaseSensitive::Yes );
+    EndsWithMatcher EndsWith( std::string str, CaseSensitive caseSensitivity = CaseSensitive::Yes );
     //! Creates matcher that accepts strings that _start_ with `str`
-    StartsWithMatcher StartsWith( std::string const& str, CaseSensitive caseSensitivity = CaseSensitive::Yes );
+    StartsWithMatcher StartsWith( std::string str, CaseSensitive caseSensitivity = CaseSensitive::Yes );
     //! Creates matcher that accepts strings matching `regex`
-    RegexMatcher Matches( std::string const& regex, CaseSensitive caseSensitivity = CaseSensitive::Yes );
+    RegexMatcher Matches( std::string regex, CaseSensitive caseSensitivity = CaseSensitive::Yes );
 
 } // namespace Matchers
 } // namespace Catch
@@ -13588,6 +13753,8 @@ namespace Catch {
         std::ostream& m_stream;
         //! Colour implementation this reporter was configured for
         Detail::unique_ptr<ColourImpl> m_colour;
+        //! Verbosity configured for this reporter
+        Verbosity m_verbosity;
         //! The custom reporter options user passed down to the reporter
         std::map<std::string, std::string> m_customOptions;
 
@@ -14179,9 +14346,6 @@ namespace Catch {
         std::stack<Writer> m_writers{};
 
         bool m_startedListing = false;
-
-        // std::size_t m_sectionDepth = 0;
-        // std::size_t m_sectionStarted = 0;
     };
 } // namespace Catch
 

meson.build

@@ -8,7 +8,7 @@
 project(
   'catch2',
   'cpp',
-  version: '3.15.1', # CML version placeholder, don't delete
+  version: '3.16.0', # CML version placeholder, don't delete
   license: 'BSL-1.0',
   meson_version: '>=0.54.1',
 )

src/CMakeLists.txt

@@ -32,6 +32,7 @@ set(BENCHMARK_HEADERS
   ${SOURCES_DIR}/benchmark/detail/catch_timing.hpp
 )
 set(BENCHMARK_SOURCES
+  ${SOURCES_DIR}/benchmark/catch_benchmark.cpp
   ${SOURCES_DIR}/benchmark/catch_chronometer.cpp
   ${SOURCES_DIR}/benchmark/detail/catch_analyse.cpp
   ${SOURCES_DIR}/benchmark/detail/catch_benchmark_function.cpp

src/catch2/benchmark/catch_benchmark.cpp

@@ -0,0 +1,54 @@
+
+//              Copyright Catch2 Authors
+// Distributed under the Boost Software License, Version 1.0.
+//   (See accompanying file LICENSE.txt or copy at
+//        https://www.boost.org/LICENSE_1_0.txt)
+
+// SPDX-License-Identifier: BSL-1.0
+
+#include <catch2/benchmark/catch_benchmark.hpp>
+
+#include <algorithm>
+#include <chrono>
+#include <cmath>
+
+namespace Catch {
+    namespace Benchmark {
+        namespace Detail {
+
+            Environment measure_environment_default() {
+                return Detail::measure_environment<default_clock>();
+            }
+
+            ExecutionPlan prepare_default( const IConfig& cfg,
+                                           Environment env,
+                                           BenchmarkFunction&& fun ) {
+                // This mirrors Benchmark::prepare<default_clock>(), but with the
+                // clock fixed so it is instantiated once here in the library.
+                auto min_time = env.clock_resolution.mean * Detail::minimum_ticks;
+                auto run_time = std::max(
+                    min_time,
+                    std::chrono::duration_cast<decltype( min_time )>(
+                        cfg.benchmarkWarmupTime() ) );
+                auto&& test = Detail::run_for_at_least<default_clock>(
+                    std::chrono::duration_cast<IDuration>( run_time ), 1, fun );
+                int new_iters = static_cast<int>(
+                    std::ceil( min_time * test.iterations / test.elapsed ) );
+                return { new_iters,
+                         test.elapsed / test.iterations * new_iters *
+                             cfg.benchmarkSamples(),
+                         CATCH_MOVE( fun ),
+                         std::chrono::duration_cast<FDuration>(
+                             cfg.benchmarkWarmupTime() ),
+                         Detail::warmup_iterations };
+            }
+
+            std::vector<FDuration> run_plan_default( ExecutionPlan const& plan,
+                                                     const IConfig& cfg,
+                                                     Environment env ) {
+                return plan.run<default_clock>( cfg, env );
+            }
+
+        } // namespace Detail
+    } // namespace Benchmark
+} // namespace Catch

src/catch2/benchmark/catch_benchmark.hpp

@@ -33,9 +33,94 @@
 #include <exception>
 #include <string>
 #include <cmath>
+#include <type_traits>
 
 namespace Catch {
     namespace Benchmark {
+        namespace Detail {
+            template <typename Clock>
+            ExecutionPlan prepare( const IConfig& cfg,
+                                   Environment env,
+                                   BenchmarkFunction&& fun ) {
+                auto min_time =
+                    env.clock_resolution.mean * Detail::minimum_ticks;
+                auto run_time =
+                    std::max( min_time,
+                              std::chrono::duration_cast<decltype( min_time )>(
+                                  cfg.benchmarkWarmupTime() ) );
+                auto&& test = Detail::run_for_at_least<Clock>(
+                    std::chrono::duration_cast<IDuration>( run_time ), 1, fun );
+                int new_iters = static_cast<int>(
+                    std::ceil( min_time * test.iterations / test.elapsed ) );
+                return { new_iters,
+                         test.elapsed / test.iterations * new_iters *
+                             cfg.benchmarkSamples(),
+                         CATCH_MOVE( fun ),
+                         std::chrono::duration_cast<FDuration>(
+                             cfg.benchmarkWarmupTime() ),
+                         Detail::warmup_iterations };
+            }
+
+            // These are wrappers for their respective function templated
+            // over `default_clock`. This allows outlining the usual use
+            // of the template into single TU and save on compilation costs.
+
+            Environment measure_environment_default();
+            ExecutionPlan prepare_default( const IConfig& cfg,
+                                           Environment env,
+                                           BenchmarkFunction&& fun );
+            std::vector<FDuration> run_plan_default( ExecutionPlan const& plan,
+                                                     const IConfig& cfg,
+                                                     Environment env );
+
+            template <typename Clock>
+            std::enable_if_t<std::is_same<Clock, default_clock>::value,
+                             Environment>
+            measureEnvironmentDispatch() {
+                return measure_environment_default();
+            }
+            template <typename Clock>
+            std::enable_if_t<!std::is_same<Clock, default_clock>::value,
+                             Environment>
+            measureEnvironmentDispatch() {
+                return measure_environment<Clock>();
+            }
+
+            template <typename Clock>
+            std::enable_if_t<std::is_same<Clock, default_clock>::value,
+                             std::vector<FDuration>>
+            runPlanDispatch( ExecutionPlan const& plan,
+                             const IConfig& cfg,
+                             Environment env ) {
+                return run_plan_default( plan, cfg, env );
+            }
+            template <typename Clock>
+            std::enable_if_t<!std::is_same<Clock, default_clock>::value,
+                             std::vector<FDuration>>
+            runPlanDispatch( ExecutionPlan const& plan,
+                             const IConfig& cfg,
+                             Environment env ) {
+                return plan.template run<Clock>( cfg, env );
+            }
+
+            template <typename Clock>
+            std::enable_if_t<std::is_same<Clock, default_clock>::value,
+                             ExecutionPlan>
+            prepareDispatch( const IConfig& cfg,
+                             Environment env,
+                             BenchmarkFunction&& fun ) {
+                return prepare_default( cfg, env, CATCH_MOVE( fun ) );
+            }
+            template <typename Clock>
+            std::enable_if_t<!std::is_same<Clock, default_clock>::value,
+                             ExecutionPlan>
+            prepareDispatch( const IConfig& cfg,
+                             Environment env,
+                             BenchmarkFunction&& fun ) {
+                return prepare<Clock>( cfg, env, CATCH_MOVE( fun ) );
+            }
+        } // namespace Detail
+
         struct Benchmark {
             Benchmark(std::string&& benchmarkName)
                 : name(CATCH_MOVE(benchmarkName)) {}
@@ -44,27 +129,18 @@ namespace Catch {
             Benchmark(std::string&& benchmarkName , FUN &&func)
                 : fun(CATCH_MOVE(func)), name(CATCH_MOVE(benchmarkName)) {}
 
-            template <typename Clock>
-            ExecutionPlan prepare(const IConfig &cfg, Environment env) {
-                auto min_time = env.clock_resolution.mean * Detail::minimum_ticks;
-                auto run_time = std::max(min_time, std::chrono::duration_cast<decltype(min_time)>(cfg.benchmarkWarmupTime()));
-                auto&& test = Detail::run_for_at_least<Clock>(std::chrono::duration_cast<IDuration>(run_time), 1, fun);
-                int new_iters = static_cast<int>(std::ceil(min_time * test.iterations / test.elapsed));
-                return { new_iters, test.elapsed / test.iterations * new_iters * cfg.benchmarkSamples(), CATCH_MOVE(fun), std::chrono::duration_cast<FDuration>(cfg.benchmarkWarmupTime()), Detail::warmup_iterations };
-            }
-
             template <typename Clock = default_clock>
             void run() {
                 static_assert( Clock::is_steady,
                                "Benchmarking clock should be steady" );
                 auto const* cfg = getCurrentContext().getConfig();
 
-                auto env = Detail::measure_environment<Clock>();
+                auto env = Detail::measureEnvironmentDispatch<Clock>();
 
                 getResultCapture().benchmarkPreparing(name);
                 CATCH_TRY{
                     auto plan = user_code([&] {
-                        return prepare<Clock>(*cfg, env);
+                        return Detail::prepareDispatch<Clock>( *cfg, env, CATCH_MOVE(fun) );
                     });
 
                     BenchmarkInfo info {
@@ -80,7 +156,7 @@ namespace Catch {
                     getResultCapture().benchmarkStarting(info);
 
                     auto samples = user_code([&] {
-                        return plan.template run<Clock>(*cfg, env);
+                        return Detail::runPlanDispatch<Clock>( plan, *cfg, env );
                     });
 
                     auto analysis = Detail::analyse(*cfg, samples.data(), samples.data() + samples.size());

src/catch2/benchmark/catch_optimizer.hpp

@@ -34,7 +34,7 @@ namespace Catch {
         } // namespace Detail
 #elif defined(_MSC_VER) || defined(__IAR_SYSTEMS_ICC__)
 
-#if defined(_MSVC_VER)
+#if defined(_MSC_VER)
 #pragma optimize("", off)
 #elif defined(__IAR_SYSTEMS_ICC__)
 // For IAR the pragma only affects the following function
@@ -71,6 +71,13 @@ namespace Catch {
         template <typename Fn, typename... Args>
         inline auto invoke_deoptimized(Fn&& fn, Args&&... args) -> std::enable_if_t<std::is_same<void, decltype(fn(args...))>::value> {
             CATCH_FORWARD((fn)) (CATCH_FORWARD(args)...);
+            // In the non-void case, we pass the result through `deoptimize_value`
+            // to force the compiler to keep it. We have no return value here,
+            // but add an optimizer barrier (ideally a memory clobber) to force
+            // the _side effects_ of the loop be visible (e.g. writes to globals).
+            // Note that writes to benchmark-locals can be optimized away, as
+            // we would expect in normal code.
+            Detail::optimizer_barrier();
         }
     } // namespace Benchmark
 } // namespace Catch

src/catch2/catch_config.cpp

@@ -89,6 +89,7 @@ namespace Catch {
         return lhs.name == rhs.name &&
                lhs.outputFilename == rhs.outputFilename &&
                lhs.colourMode == rhs.colourMode &&
+               lhs.verbosity == rhs.verbosity &&
                lhs.customOptions == rhs.customOptions;
     }
 
@@ -157,6 +158,7 @@ namespace Catch {
                 reporterSpec.outputFile() ? *reporterSpec.outputFile()
                                           : data.defaultOutputFilename,
                 reporterSpec.colourMode().valueOr( data.defaultColourMode ),
+                reporterSpec.verbosity().valueOr( data.verbosity ),
                 reporterSpec.customOptions() } );
         }
     }
@@ -207,6 +209,7 @@ namespace Catch {
     double Config::minDuration() const                 { return m_data.minDuration; }
     TestRunOrder Config::runOrder() const              { return m_data.runOrder; }
     uint32_t Config::rngSeed() const                   { return m_data.rngSeed; }
+    bool Config::rngSeedWasFixed() const               { return m_data.rngSeedWasFixed; }
     unsigned int Config::shardCount() const            { return m_data.shardCount; }
     unsigned int Config::shardIndex() const            { return m_data.shardIndex; }
     ColourMode Config::defaultColourMode() const       { return m_data.defaultColourMode; }
@@ -232,7 +235,7 @@ namespace Catch {
 
         if ( bazelOutputFile ) {
             m_data.reporterSpecifications.push_back(
-                { "junit", std::string( bazelOutputFile ), {}, {} } );
+                { "junit", std::string( bazelOutputFile ), {}, {}, {} } );
         }
 
         const auto bazelTestSpec = Detail::getEnv( "TESTBRIDGE_TEST_ONLY" );
@@ -271,6 +274,7 @@ namespace Catch {
                     << bazelRandomSeed << "') as proper seed.\n";
             } else {
                 m_data.rngSeed = *parsedSeed;
+                m_data.rngSeedWasFixed = true;
             }
         }
     }

src/catch2/catch_config.hpp

@@ -35,6 +35,7 @@ namespace Catch {
         std::string name;
         std::string outputFilename;
         ColourMode colourMode;
+        Verbosity verbosity;
         std::map<std::string, std::string> customOptions;
         friend bool operator==( ProcessedReporterSpec const& lhs,
                                 ProcessedReporterSpec const& rhs );
@@ -62,6 +63,7 @@ namespace Catch {
 
         int abortAfter = -1;
         uint32_t rngSeed = generateRandomSeed(GenerateFrom::Default);
+        bool rngSeedWasFixed = false;
 
         unsigned int shardCount = 1;
         unsigned int shardIndex = 0;
@@ -133,6 +135,7 @@ namespace Catch {
         double minDuration() const override;
         TestRunOrder runOrder() const override;
         uint32_t rngSeed() const override;
+        bool rngSeedWasFixed() const;
         unsigned int shardCount() const override;
         unsigned int shardIndex() const override;
         ColourMode defaultColourMode() const override;

src/catch2/catch_registry_hub.cpp

@@ -72,6 +72,10 @@ namespace Catch {
 #endif
             }
 
+            ITestCaseRegistry& getMutableTestCaseRegistry() override {
+                return m_testCaseRegistry;
+            }
+
         private:
             TestRegistry m_testCaseRegistry;
             ReporterRegistry m_reporterRegistry;

src/catch2/catch_session.cpp

@@ -52,6 +52,7 @@ namespace Catch {
                     ReporterConfig( config,
                                     makeStream( spec.outputFilename ),
                                     spec.colourMode,
+                                    spec.verbosity,
                                     spec.customOptions ) );
             }
 
@@ -68,6 +69,7 @@ namespace Catch {
                     ReporterConfig( config,
                                     makeStream( reporterSpec.outputFilename ),
                                     reporterSpec.colourMode,
+                                    reporterSpec.verbosity,
                                     reporterSpec.customOptions ) ) );
             }
 
@@ -138,9 +140,7 @@ namespace Catch {
         };
 
         void applyFilenamesAsTags() {
-            for (auto const& testInfo : getRegistryHub().getTestCaseRegistry().getAllInfos()) {
-                testInfo->addFilenameTag();
-            }
+            getMutableRegistryHub().getMutableTestCaseRegistry().enableFilenameTags();
         }
 
         // Creates empty file at path. The path must be writable, we do not
@@ -346,6 +346,19 @@ namespace Catch {
         CATCH_TRY {
             config(); // Force config to be constructed
 
+            if ( m_config->shardCount() > 1 &&
+                 m_config->runOrder() == TestRunOrder::Randomized &&
+                 !m_config->rngSeedWasFixed() ) {
+                Catch::cerr()
+                    << "Warning: using sharding (--shard-count) with random "
+                       "order (--order rand, the default) and without a fixed "
+                       "numeric --rng-seed does not guarantee disjoint coverage "
+                       "between shard invocations. Pass the same numeric "
+                       "--rng-seed to every shard, or use --order decl or "
+                       "--order lex instead.\n"
+                    << std::flush;
+            }
+
             // We need to retrieve potential Bazel config with the full Config
             // constructor, so we have to create the guard file after it is created.
             setUpGuardFile( m_config->getExitGuardFilePath() );

src/catch2/catch_translate_exception.hpp

@@ -41,6 +41,8 @@ namespace Catch {
                     return m_translateFunction( ex );
                 }
 #else
+                (void)it;
+                (void)itEnd;
                 return "You should never get here!";
 #endif
             }

src/catch2/catch_version.cpp

@@ -36,7 +36,7 @@ namespace Catch {
     }
 
     Version const& libraryVersion() {
-        static Version version( 3, 15, 1, "", 0 );
+        static Version version( 3, 16, 0, "", 0 );
         return version;
     }
 

src/catch2/catch_version_macros.hpp

@@ -9,7 +9,7 @@
 #define CATCH_VERSION_MACROS_HPP_INCLUDED
 
 #define CATCH_VERSION_MAJOR 3
-#define CATCH_VERSION_MINOR 15
-#define CATCH_VERSION_PATCH 1
+#define CATCH_VERSION_MINOR 16
+#define CATCH_VERSION_PATCH 0
 
 #endif // CATCH_VERSION_MACROS_HPP_INCLUDED

src/catch2/generators/catch_generators.hpp

@@ -95,7 +95,7 @@ namespace Generators {
         void skipToNthElementImpl( std::size_t n ) override {
             if ( n >= m_values.size() ) {
                 Detail::throw_generator_exception(
-                    "Coud not jump to Nth element: not enough elements" );
+                    "Could not jump to Nth element: not enough elements" );
             }
             m_idx = n;
         }
@@ -179,8 +179,7 @@ namespace Generators {
 
         bool isFinite() const override {
             for (auto const& gen : m_generators) {
-                if (!gen.isFinite()) { return false;
-                }
+                if (!gen.isFinite()) { return false; }
             }
             return true;
         }

src/catch2/generators/catch_generators_adapters.hpp

@@ -27,7 +27,7 @@ namespace Generators {
         void skipToNthElementImpl( std::size_t n ) override {
             if ( n >= m_target ) {
                 Detail::throw_generator_exception(
-                    "Coud not jump to Nth element: not enough elements" );
+                    "Could not jump to Nth element: not enough elements" );
             }
 
             m_generator.skipToNthElement( n );

src/catch2/interfaces/catch_interfaces_generatortracker.cpp

@@ -28,7 +28,7 @@ namespace Catch {
                 bool isValid = next();
                 if ( !isValid ) {
                     Detail::throw_generator_exception(
-                        "Coud not jump to Nth element: not enough elements" );
+                        "Could not jump to Nth element: not enough elements" );
                 }
             }
         }

src/catch2/interfaces/catch_interfaces_registry_hub.hpp

@@ -53,6 +53,8 @@ namespace Catch {
         virtual void registerTranslator( Detail::unique_ptr<IExceptionTranslator>&& translator ) = 0;
         virtual void registerTagAlias( std::string const& alias, std::string const& tag, SourceLineInfo const& lineInfo ) = 0;
         virtual void registerStartupException() noexcept = 0;
+
+        virtual ITestCaseRegistry& getMutableTestCaseRegistry() = 0;
     };
 
     IRegistryHub const& getRegistryHub();

src/catch2/interfaces/catch_interfaces_reporter.cpp

@@ -19,10 +19,12 @@ namespace Catch {
         IConfig const* _fullConfig,
         Detail::unique_ptr<IStream> _stream,
         ColourMode colourMode,
+        Verbosity verbosity,
         std::map<std::string, std::string> customOptions ):
         m_stream( CATCH_MOVE(_stream) ),
         m_fullConfig( _fullConfig ),
         m_colourMode( colourMode ),
+        m_verbosity( verbosity ),
         m_customOptions( CATCH_MOVE( customOptions ) ) {}
 
     Detail::unique_ptr<IStream> ReporterConfig::takeStream() && {
@@ -31,6 +33,7 @@ namespace Catch {
     }
     IConfig const * ReporterConfig::fullConfig() const { return m_fullConfig; }
     ColourMode ReporterConfig::colourMode() const { return m_colourMode; }
+    Verbosity ReporterConfig::verbosity() const { return m_verbosity; }
 
     std::map<std::string, std::string> const&
     ReporterConfig::customOptions() const {

src/catch2/interfaces/catch_interfaces_reporter.hpp

@@ -12,6 +12,7 @@
 #include <catch2/catch_test_run_info.hpp>
 #include <catch2/catch_totals.hpp>
 #include <catch2/catch_assertion_result.hpp>
+#include <catch2/interfaces/catch_interfaces_config.hpp>
 #include <catch2/internal/catch_message_info.hpp>
 #include <catch2/internal/catch_stringref.hpp>
 #include <catch2/internal/catch_unique_ptr.hpp>
@@ -36,6 +37,7 @@ namespace Catch {
         ReporterConfig( IConfig const* _fullConfig,
                         Detail::unique_ptr<IStream> _stream,
                         ColourMode colourMode,
+                        Verbosity verbosity,
                         std::map<std::string, std::string> customOptions );
 
         ReporterConfig( ReporterConfig&& ) = default;
@@ -45,12 +47,14 @@ namespace Catch {
         Detail::unique_ptr<IStream> takeStream() &&;
         IConfig const* fullConfig() const;
         ColourMode colourMode() const;
+        Verbosity verbosity() const;
         std::map<std::string, std::string> const& customOptions() const;
 
     private:
         Detail::unique_ptr<IStream> m_stream;
         IConfig const* m_fullConfig;
         ColourMode m_colourMode;
+        Verbosity m_verbosity;
         std::map<std::string, std::string> m_customOptions;
     };
 

src/catch2/interfaces/catch_interfaces_testcase.hpp

@@ -19,8 +19,7 @@ namespace Catch {
     class ITestCaseRegistry {
     public:
         virtual ~ITestCaseRegistry(); // = default
-        // TODO: this exists only for adding filenames to test cases -- let's expose this in a saner way later
-        virtual std::vector<TestCaseInfo* > const& getAllInfos() const = 0;
+        virtual void enableFilenameTags() = 0;
         virtual std::vector<TestCaseHandle> const& getAllTests() const = 0;
         virtual std::vector<TestCaseHandle> const& getAllTestsSorted( IConfig const& config ) const = 0;
     };

src/catch2/internal/catch_commandline.cpp

@@ -75,9 +75,11 @@ namespace Catch {
         auto const setRngSeed = [&]( std::string const& seed ) {
                 if( seed == "time" ) {
                     config.rngSeed = generateRandomSeed(GenerateFrom::Time);
+                    config.rngSeedWasFixed = false;
                     return ParserResult::ok(ParseResultType::Matched);
                 } else if (seed == "random-device") {
                     config.rngSeed = generateRandomSeed(GenerateFrom::RandomDevice);
+                    config.rngSeedWasFixed = false;
                     return ParserResult::ok(ParseResultType::Matched);
                 }
 
@@ -88,6 +90,7 @@ namespace Catch {
                     return ParserResult::runtimeError( "Could not parse '" + seed + "' as seed" );
                 }
                 config.rngSeed = *parsedSeed;
+                config.rngSeedWasFixed = true;
                 return ParserResult::ok( ParseResultType::Matched );
             };
         auto const setDefaultColourMode = [&]( std::string const& colourMode ) {

src/catch2/internal/catch_jsonwriter.cpp

@@ -7,14 +7,31 @@
 // SPDX-License-Identifier: BSL-1.0
 #include <catch2/internal/catch_enforce.hpp>
 #include <catch2/internal/catch_jsonwriter.hpp>
+#include <catch2/internal/catch_polyfills.hpp>
 #include <catch2/internal/catch_unreachable.hpp>
 
+#include <cmath>
+#include <locale>
+
 namespace Catch {
 
     namespace {
-        static bool needsEscape( char c ) {
-            return c == '"' || c == '\\' || c == '\b' || c == '\f' ||
-                   c == '\n' || c == '\r' || c == '\t';
+        struct EscapeLUT {
+            bool escape[256] = {};
+            constexpr EscapeLUT() {
+                escape[static_cast<unsigned char>( '"' )] = true;
+                escape[static_cast<unsigned char>( '\\' )] = true;
+                escape[static_cast<unsigned char>( '\b' )] = true;
+                escape[static_cast<unsigned char>( '\f' )] = true;
+                escape[static_cast<unsigned char>( '\n' )] = true;
+                escape[static_cast<unsigned char>( '\r' )] = true;
+                escape[static_cast<unsigned char>( '\t' )] = true;
+            }
+        };
+        static constexpr EscapeLUT escapeLUT{};
+
+        static constexpr bool needsEscape( char c ) {
+            return escapeLUT.escape[static_cast<unsigned char>( c )];
         }
 
         static Catch::StringRef makeEscapeStringRef( char c ) {
@@ -126,7 +143,10 @@ namespace Catch {
 
     JsonValueWriter::JsonValueWriter( std::ostream& os,
                                       std::uint64_t indent_level ):
-        m_os{ os }, m_indent_level{ indent_level } {}
+        m_os{ os }, m_indent_level{ indent_level } {
+        // We use C locale so that writing of numerical values is locale-independent.
+        m_sstream.imbue( std::locale::classic() );
+    }
 
     JsonObjectWriter JsonValueWriter::writeObject() && {
         return JsonObjectWriter{ m_os, m_indent_level };
@@ -140,26 +160,55 @@ namespace Catch {
         writeImpl( value, true );
     }
 
+    void JsonValueWriter::write( float value ) && {
+        writeFloatingPoint( value );
+    }
+
+    void JsonValueWriter::write( double value ) && {
+        writeFloatingPoint( value );
+    }
+
     void JsonValueWriter::write( bool value ) && {
         writeImpl( value ? "true"_sr : "false"_sr, false );
     }
 
+    template <typename T>
+    void JsonValueWriter::writeFloatingPoint( T value ) {
+        if ( Catch::isnan( value ) ) {
+            writeImpl( "NaN"_sr, false );
+        } else if ( std::isinf( value ) ) {
+            writeImpl( value < 0 ? "-Infinity"_sr : "Infinity"_sr, false );
+        } else {
+            m_sstream << value;
+            writeImpl( m_sstream.str(), false );
+        }
+    }
+
     void JsonValueWriter::writeImpl( Catch::StringRef value, bool quote ) {
-        if ( quote ) { m_os << '"'; }
-        size_t current_start = 0;
-        for ( size_t i = 0; i < value.size(); ++i ) {
-            if ( needsEscape( value[i] ) ) {
-                if ( current_start < i ) {
-                    m_os << value.substr( current_start, i - current_start );
+        // Escaping only makes sense for actual strings, which are passed
+        // with `quote == true`. Non-quoted values are things like bools
+        // and numbers, which cannot create inputs that need escaping.
+        if ( !quote ) {
+            m_os << value;
+        } else {
+            m_os << '"';
+            size_t current_start = 0;
+            for ( size_t i = 0; i < value.size(); ++i ) {
+                if ( needsEscape( value[i] ) ) {
+                    if ( current_start < i ) {
+                        m_os
+                            << value.substr( current_start, i - current_start );
+                    }
+                    m_os << makeEscapeStringRef( value[i] );
+                    current_start = i + 1;
                 }
-                m_os << makeEscapeStringRef( value[i] );
-                current_start = i + 1;
             }
+            if ( current_start < value.size() ) {
+                m_os << value.substr( current_start,
+                                      value.size() - current_start );
+            }
+            m_os << '"';
         }
-        if ( current_start < value.size() ) {
-            m_os << value.substr( current_start, value.size() - current_start );
-        }
-        if ( quote ) { m_os << '"'; }
     }
 
 } // namespace Catch

src/catch2/internal/catch_jsonwriter.hpp

@@ -39,11 +39,19 @@ namespace Catch {
             writeImpl( value, !std::is_arithmetic<T>::value );
         }
         void write( StringRef value ) &&;
+        void write( float value ) &&;
+        void write( double value ) &&;
         void write( bool value ) &&;
 
     private:
         void writeImpl( StringRef value, bool quote );
 
+        // Helper to deal with non-finite floating point values, which
+        // are not standard JSON, but we use JS/Python/etc. approach of
+        // emitting `NaN`, `Infinity`, `-Infinity` as number(like).
+        template <typename T>
+        void writeFloatingPoint( T value );
+
         // Without this SFINAE, this overload is a better match
         // for `std::string`, `char const*`, `char const[N]` args.
         // While it would still work, it would cause code bloat

src/catch2/internal/catch_preprocessor.hpp

@@ -9,6 +9,7 @@
 #define CATCH_PREPROCESSOR_HPP_INCLUDED
 
 #include <catch2/internal/catch_preprocessor_remove_parens.hpp>
+#include <catch2/internal/catch_meta.hpp>
 
 #if defined(__GNUC__)
 // We need to silence "empty __VA_ARGS__ warning", and using just _Pragma does not work
@@ -22,6 +23,51 @@ namespace Catch {
         struct priority_tag : priority_tag<N - 1> {};
         template <>
         struct priority_tag<0> {};
+
+        // This is a bunch of helpers for the templated test case handling.
+        // They should live elsewhere in the long run, but as an in-between
+        // step we toss them all here.
+        template <typename...> struct TypeList {};
+        template <typename... Ts>
+        constexpr auto get_wrapper( priority_tag<1> ) noexcept -> TypeList<Ts...> { return {}; }
+        template <template <typename...> class...> struct TemplateTypeList {};
+        // Clang 20 and 21 cannot handle an explicitly specified all-pack
+        // template-template parameter here ("conflicting deduction" regression,
+        // llvm/llvm-project#130778; fixed for Clang 22).
+        // Remove get_template_wrapper once Clang 21 is no longer supported.
+        template <template <typename...> class C, template <typename...> class... Cs>
+        constexpr auto get_template_wrapper( priority_tag<1> ) noexcept -> TemplateTypeList<C, Cs...> { return {}; }
+
+        template <typename...>
+        struct append;
+        template <typename T>
+        struct append<T> { using type = T; };
+        template <template <typename...> class L1, typename... E1, template <typename...> class L2, typename... E2, typename... Rest>
+        struct append<L1<E1...>, L2<E2...>, Rest...> { using type = typename append<L1<E1..., E2...>, Rest...>::type; };
+        template <template <typename...> class L1, typename... E1, typename... Rest>
+        struct append<L1<E1...>, TypeList<mpl_::na>, Rest...> { using type = L1<E1...>; };
+
+        template <template <typename...> class, typename>
+        struct convert;
+        template <template <typename...> class Final, template <typename...> class List, typename... Ts>
+        struct convert<Final, List<Ts...>> { using type = typename append<Final<>, TypeList<Ts>...>::type; };
+
+        // These are helpers for the PRODUCT templated test cases.
+        // Note that the _SIG macros (for NTTPs) also use specializations
+        // of these, but they have to use their own instances due to needing
+        // per-sig specializations and we have to keep these in their own
+        // unnamed namespace.
+        template <typename...>
+        struct rewrap;
+        template <template <typename...> class Container, template <typename...> class List, typename... elems>
+        struct rewrap<TemplateTypeList<Container>, List<elems...>> { using type = TypeList<Container<elems...>>; };
+        template <template <typename...> class Container, template <typename...> class List, class... Elems, typename... Elements>
+        struct rewrap<TemplateTypeList<Container>, List<Elems...>, Elements...> { using type = typename append<TypeList<Container<Elems...>>, typename rewrap<TemplateTypeList<Container>, Elements...>::type>::type; };
+
+        template <template <typename...> class, typename...>
+        struct create;
+        template <template <typename...> class Final, template <typename...> class... Containers, typename... Types>
+        struct create<Final, TemplateTypeList<Containers...>, TypeList<Types...>> { using type = typename append<Final<>, typename rewrap<TemplateTypeList<Containers>, Types...>::type...>::type; };
     }
 }
 
@@ -108,46 +154,42 @@ namespace Catch {
 
 #define INTERNAL_CATCH_VA_NARGS_IMPL(_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, N, ...) N
 
-#define INTERNAL_CATCH_TYPE_GEN\
-    template<typename...> struct TypeList {};\
-    template<typename... Ts>\
-    constexpr auto get_wrapper(Catch::Detail::priority_tag<1>) noexcept -> TypeList<Ts...> { return {}; }\
-    template<template<typename...> class...> struct TemplateTypeList{};\
-    template<template<typename...> class...Cs>\
-    constexpr auto get_wrapper(Catch::Detail::priority_tag<1>) noexcept -> TemplateTypeList<Cs...> { return {}; }\
-    template<typename...>\
-    struct append;\
-    template<typename...>\
-    struct rewrap;\
-    template<template<typename...> class, typename...>\
-    struct create;\
-    template<template<typename...> class, typename>\
-    struct convert;\
-    \
-    template<typename T> \
-    struct append<T> { using type = T; };\
-    template< template<typename...> class L1, typename...E1, template<typename...> class L2, typename...E2, typename...Rest>\
-    struct append<L1<E1...>, L2<E2...>, Rest...> { using type = typename append<L1<E1...,E2...>, Rest...>::type; };\
-    template< template<typename...> class L1, typename...E1, typename...Rest>\
-    struct append<L1<E1...>, TypeList<mpl_::na>, Rest...> { using type = L1<E1...>; };\
+#define INTERNAL_CATCH_TYPE_GEN \
+    /* We moved these into a central location and no longer create them
+       in each templated test's unnamed namespace, but we pull them in
+       with using to avoid qualifying all the references. */ \
+    using Catch::Detail::TypeList;                     \
+    using Catch::Detail::get_wrapper;                  \
+    using Catch::Detail::TemplateTypeList;             \
+    using Catch::Detail::get_template_wrapper;         \
+    using Catch::Detail::append;                       \
+    using Catch::Detail::convert;
+
+// This stamps out the per test case specializations of wrapper handlers
+// for _SIG (NTTP) macros inside their own namespace, so they can add
+// their required specializations
+#define INTERNAL_CATCH_NTTP_1( signature, ... ) \
+    template<INTERNAL_CATCH_REMOVE_PARENS(signature)> struct Nttp{};\
+    template<INTERNAL_CATCH_REMOVE_PARENS(signature)>\
+    constexpr auto get_wrapper(Catch::Detail::priority_tag<0>) noexcept -> Nttp<__VA_ARGS__> { return {}; } \
+    template<template<INTERNAL_CATCH_REMOVE_PARENS(signature)> class...> struct NttpTemplateTypeList{};\
+    template<template<INTERNAL_CATCH_REMOVE_PARENS(signature)> class C, template<INTERNAL_CATCH_REMOVE_PARENS(signature)> class...Cs>\
+    constexpr auto get_template_wrapper(Catch::Detail::priority_tag<0>) noexcept -> NttpTemplateTypeList<C, Cs...> { return {}; }
+
+// This stamps out the per test case specializations of type-product
+// machinery for the NTTP product macros.
+#define INTERNAL_CATCH_NTTP_REWRAP_1( signature, ... ) \
+    template<typename...>                              \
+    struct rewrap;                                     \
+    template<template<typename...> class, typename...> \
+    struct create;                                     \
     \
     template< template<typename...> class Container, template<typename...> class List, typename...elems>\
     struct rewrap<TemplateTypeList<Container>, List<elems...>> { using type = TypeList<Container<elems...>>; };\
     template< template<typename...> class Container, template<typename...> class List, class...Elems, typename...Elements>\
     struct rewrap<TemplateTypeList<Container>, List<Elems...>, Elements...> { using type = typename append<TypeList<Container<Elems...>>, typename rewrap<TemplateTypeList<Container>, Elements...>::type>::type; };\
-    \
     template<template <typename...> class Final, template< typename...> class...Containers, typename...Types>\
     struct create<Final, TemplateTypeList<Containers...>, TypeList<Types...>> { using type = typename append<Final<>, typename rewrap<TemplateTypeList<Containers>, Types...>::type...>::type; };\
-    template<template <typename...> class Final, template <typename...> class List, typename...Ts>\
-    struct convert<Final, List<Ts...>> { using type = typename append<Final<>,TypeList<Ts>...>::type; };
-
-#define INTERNAL_CATCH_NTTP_1(signature, ...)\
-    template<INTERNAL_CATCH_REMOVE_PARENS(signature)> struct Nttp{};\
-    template<INTERNAL_CATCH_REMOVE_PARENS(signature)>\
-    constexpr auto get_wrapper(Catch::Detail::priority_tag<0>) noexcept -> Nttp<__VA_ARGS__> { return {}; } \
-    template<template<INTERNAL_CATCH_REMOVE_PARENS(signature)> class...> struct NttpTemplateTypeList{};\
-    template<template<INTERNAL_CATCH_REMOVE_PARENS(signature)> class...Cs>\
-    constexpr auto get_wrapper(Catch::Detail::priority_tag<0>) noexcept -> NttpTemplateTypeList<Cs...> { return {}; } \
     \
     template< template<INTERNAL_CATCH_REMOVE_PARENS(signature)> class Container, template<INTERNAL_CATCH_REMOVE_PARENS(signature)> class List, INTERNAL_CATCH_REMOVE_PARENS(signature)>\
     struct rewrap<NttpTemplateTypeList<Container>, List<__VA_ARGS__>> { using type = TypeList<Container<__VA_ARGS__>>; };\
@@ -224,7 +266,9 @@ namespace Catch {
 
 #ifndef CATCH_CONFIG_TRADITIONAL_MSVC_PREPROCESSOR
 #define INTERNAL_CATCH_NTTP_0
+#define INTERNAL_CATCH_NTTP_0_REWRAP using Catch::Detail::rewrap; using Catch::Detail::create;
 #define INTERNAL_CATCH_NTTP_GEN(...) INTERNAL_CATCH_VA_NARGS_IMPL(__VA_ARGS__, INTERNAL_CATCH_NTTP_1(__VA_ARGS__), INTERNAL_CATCH_NTTP_1(__VA_ARGS__), INTERNAL_CATCH_NTTP_1(__VA_ARGS__), INTERNAL_CATCH_NTTP_1(__VA_ARGS__), INTERNAL_CATCH_NTTP_1(__VA_ARGS__), INTERNAL_CATCH_NTTP_1( __VA_ARGS__), INTERNAL_CATCH_NTTP_1( __VA_ARGS__), INTERNAL_CATCH_NTTP_1( __VA_ARGS__), INTERNAL_CATCH_NTTP_1( __VA_ARGS__),INTERNAL_CATCH_NTTP_1( __VA_ARGS__), INTERNAL_CATCH_NTTP_0)
+#define INTERNAL_CATCH_NTTP_REWRAP_GEN(...) INTERNAL_CATCH_VA_NARGS_IMPL(__VA_ARGS__, INTERNAL_CATCH_NTTP_REWRAP_1(__VA_ARGS__), INTERNAL_CATCH_NTTP_REWRAP_1(__VA_ARGS__), INTERNAL_CATCH_NTTP_REWRAP_1(__VA_ARGS__), INTERNAL_CATCH_NTTP_REWRAP_1(__VA_ARGS__), INTERNAL_CATCH_NTTP_REWRAP_1(__VA_ARGS__), INTERNAL_CATCH_NTTP_REWRAP_1( __VA_ARGS__), INTERNAL_CATCH_NTTP_REWRAP_1( __VA_ARGS__), INTERNAL_CATCH_NTTP_REWRAP_1( __VA_ARGS__), INTERNAL_CATCH_NTTP_REWRAP_1( __VA_ARGS__),INTERNAL_CATCH_NTTP_REWRAP_1( __VA_ARGS__), INTERNAL_CATCH_NTTP_0_REWRAP)
 #define INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD(TestName, ...) INTERNAL_CATCH_VA_NARGS_IMPL( "dummy", __VA_ARGS__, INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD_X,INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD_X,INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD_X,INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD1, INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD0)(TestName, __VA_ARGS__)
 #define INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD(TestName, ClassName, ...) INTERNAL_CATCH_VA_NARGS_IMPL( "dummy", __VA_ARGS__, INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD_X,INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD_X,INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD_X,INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD1, INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD0)(TestName, ClassName, __VA_ARGS__)
 #define INTERNAL_CATCH_NTTP_REG_METHOD_GEN(TestName, ...) INTERNAL_CATCH_VA_NARGS_IMPL( "dummy", __VA_ARGS__, INTERNAL_CATCH_NTTP_REGISTER_METHOD, INTERNAL_CATCH_NTTP_REGISTER_METHOD, INTERNAL_CATCH_NTTP_REGISTER_METHOD, INTERNAL_CATCH_NTTP_REGISTER_METHOD, INTERNAL_CATCH_NTTP_REGISTER_METHOD, INTERNAL_CATCH_NTTP_REGISTER_METHOD, INTERNAL_CATCH_NTTP_REGISTER_METHOD, INTERNAL_CATCH_NTTP_REGISTER_METHOD, INTERNAL_CATCH_NTTP_REGISTER_METHOD, INTERNAL_CATCH_NTTP_REGISTER_METHOD0, INTERNAL_CATCH_NTTP_REGISTER_METHOD0)(TestName, __VA_ARGS__)
@@ -234,7 +278,9 @@ namespace Catch {
 #define INTERNAL_CATCH_REMOVE_PARENS_GEN(...) INTERNAL_CATCH_VA_NARGS_IMPL(__VA_ARGS__, INTERNAL_CATCH_REMOVE_PARENS_11_ARG,INTERNAL_CATCH_REMOVE_PARENS_10_ARG,INTERNAL_CATCH_REMOVE_PARENS_9_ARG,INTERNAL_CATCH_REMOVE_PARENS_8_ARG,INTERNAL_CATCH_REMOVE_PARENS_7_ARG,INTERNAL_CATCH_REMOVE_PARENS_6_ARG,INTERNAL_CATCH_REMOVE_PARENS_5_ARG,INTERNAL_CATCH_REMOVE_PARENS_4_ARG,INTERNAL_CATCH_REMOVE_PARENS_3_ARG,INTERNAL_CATCH_REMOVE_PARENS_2_ARG,INTERNAL_CATCH_REMOVE_PARENS_1_ARG)(__VA_ARGS__)
 #else
 #define INTERNAL_CATCH_NTTP_0(signature)
+#define INTERNAL_CATCH_NTTP_0_REWRAP(signature) using Catch::Detail::rewrap; using Catch::Detail::create;
 #define INTERNAL_CATCH_NTTP_GEN(...) INTERNAL_CATCH_EXPAND_VARGS(INTERNAL_CATCH_VA_NARGS_IMPL(__VA_ARGS__, INTERNAL_CATCH_NTTP_1, INTERNAL_CATCH_NTTP_1, INTERNAL_CATCH_NTTP_1, INTERNAL_CATCH_NTTP_1, INTERNAL_CATCH_NTTP_1, INTERNAL_CATCH_NTTP_1, INTERNAL_CATCH_NTTP_1, INTERNAL_CATCH_NTTP_1, INTERNAL_CATCH_NTTP_1,INTERNAL_CATCH_NTTP_1, INTERNAL_CATCH_NTTP_0)( __VA_ARGS__))
+#define INTERNAL_CATCH_NTTP_REWRAP_GEN(...) INTERNAL_CATCH_EXPAND_VARGS(INTERNAL_CATCH_VA_NARGS_IMPL(__VA_ARGS__, INTERNAL_CATCH_NTTP_REWRAP_1, INTERNAL_CATCH_NTTP_REWRAP_1, INTERNAL_CATCH_NTTP_REWRAP_1, INTERNAL_CATCH_NTTP_REWRAP_1, INTERNAL_CATCH_NTTP_REWRAP_1, INTERNAL_CATCH_NTTP_REWRAP_1, INTERNAL_CATCH_NTTP_REWRAP_1, INTERNAL_CATCH_NTTP_REWRAP_1, INTERNAL_CATCH_NTTP_REWRAP_1,INTERNAL_CATCH_NTTP_REWRAP_1, INTERNAL_CATCH_NTTP_0_REWRAP)( __VA_ARGS__))
 #define INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD(TestName, ...) INTERNAL_CATCH_EXPAND_VARGS(INTERNAL_CATCH_VA_NARGS_IMPL( "dummy", __VA_ARGS__, INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD_X,INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD_X,INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD_X,INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD1, INTERNAL_CATCH_DEFINE_SIG_TEST_METHOD0)(TestName, __VA_ARGS__))
 #define INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD(TestName, ClassName, ...) INTERNAL_CATCH_EXPAND_VARGS(INTERNAL_CATCH_VA_NARGS_IMPL( "dummy", __VA_ARGS__, INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD_X,INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD_X,INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD_X,INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD_X, INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD1, INTERNAL_CATCH_DECLARE_SIG_TEST_METHOD0)(TestName, ClassName, __VA_ARGS__))
 #define INTERNAL_CATCH_NTTP_REG_METHOD_GEN(TestName, ...) INTERNAL_CATCH_EXPAND_VARGS(INTERNAL_CATCH_VA_NARGS_IMPL( "dummy", __VA_ARGS__, INTERNAL_CATCH_NTTP_REGISTER_METHOD, INTERNAL_CATCH_NTTP_REGISTER_METHOD, INTERNAL_CATCH_NTTP_REGISTER_METHOD, INTERNAL_CATCH_NTTP_REGISTER_METHOD, INTERNAL_CATCH_NTTP_REGISTER_METHOD, INTERNAL_CATCH_NTTP_REGISTER_METHOD, INTERNAL_CATCH_NTTP_REGISTER_METHOD, INTERNAL_CATCH_NTTP_REGISTER_METHOD, INTERNAL_CATCH_NTTP_REGISTER_METHOD, INTERNAL_CATCH_NTTP_REGISTER_METHOD0, INTERNAL_CATCH_NTTP_REGISTER_METHOD0)(TestName, __VA_ARGS__))

src/catch2/internal/catch_reporter_spec_parser.cpp

@@ -93,6 +93,18 @@ namespace Catch {
                 return {};
             }
         }
+
+        Optional<Verbosity> stringToVerbosity( StringRef verbosity ) {
+            if (verbosity == "quiet") { return Verbosity::Quiet;
+            } else if ( verbosity == "normal" ) {
+                return Verbosity::Normal;
+            } else if ( verbosity == "high" ) {
+                return Verbosity::High;
+            } else {
+                return {};
+            }
+        }
+
     } // namespace Detail
 
 
@@ -100,6 +112,7 @@ namespace Catch {
         return lhs.m_name == rhs.m_name &&
                lhs.m_outputFileName == rhs.m_outputFileName &&
                lhs.m_colourMode == rhs.m_colourMode &&
+               lhs.m_verbosity == rhs.m_verbosity &&
                lhs.m_customOptions == rhs.m_customOptions;
     }
 
@@ -111,6 +124,7 @@ namespace Catch {
         std::map<std::string, std::string> kvPairs;
         Optional<std::string> outputFileName;
         Optional<ColourMode> colourMode;
+        Optional<Verbosity> verbosity;
 
         // First part is always reporter name, so we skip it
         for ( size_t i = 1; i < parts.size(); ++i ) {
@@ -148,6 +162,12 @@ namespace Catch {
                 if ( !colourMode ) {
                     return {};
                 }
+            } else if ( key == "verbosity" ) {
+                // Duplicated key
+                if ( verbosity ) { return {}; }
+                verbosity = Detail::stringToVerbosity( value );
+                // Parsing failed
+                if ( !verbosity ) { return {}; }
             } else {
                 // Unrecognized option
                 return {};
@@ -157,6 +177,7 @@ namespace Catch {
         return ReporterSpec{ CATCH_MOVE( parts[0] ),
                              CATCH_MOVE( outputFileName ),
                              CATCH_MOVE( colourMode ),
+                             CATCH_MOVE( verbosity),
                              CATCH_MOVE( kvPairs ) };
     }
 
@@ -164,10 +185,12 @@ ReporterSpec::ReporterSpec(
         std::string name,
         Optional<std::string> outputFileName,
         Optional<ColourMode> colourMode,
+        Optional<Verbosity> verbosity,
         std::map<std::string, std::string> customOptions ):
         m_name( CATCH_MOVE( name ) ),
         m_outputFileName( CATCH_MOVE( outputFileName ) ),
         m_colourMode( CATCH_MOVE( colourMode ) ),
+        m_verbosity( CATCH_MOVE( verbosity ) ),
         m_customOptions( CATCH_MOVE( customOptions ) ) {}
 
 } // namespace Catch

src/catch2/internal/catch_reporter_spec_parser.hpp

@@ -25,6 +25,7 @@ namespace Catch {
         std::vector<std::string> splitReporterSpec( StringRef reporterSpec );
 
         Optional<ColourMode> stringToColourMode( StringRef colourMode );
+        Optional<Verbosity> stringToVerbosity( StringRef verbosity );
     }
 
     /**
@@ -39,6 +40,7 @@ namespace Catch {
         std::string m_name;
         Optional<std::string> m_outputFileName;
         Optional<ColourMode> m_colourMode;
+        Optional<Verbosity> m_verbosity;
         std::map<std::string, std::string> m_customOptions;
 
         friend bool operator==( ReporterSpec const& lhs,
@@ -53,6 +55,7 @@ namespace Catch {
             std::string name,
             Optional<std::string> outputFileName,
             Optional<ColourMode> colourMode,
+            Optional<Verbosity> verbosity,
             std::map<std::string, std::string> customOptions );
 
         std::string const& name() const { return m_name; }
@@ -63,13 +66,15 @@ namespace Catch {
 
         Optional<ColourMode> const& colourMode() const { return m_colourMode; }
 
+        Optional<Verbosity> const& verbosity() const { return m_verbosity; }
+
         std::map<std::string, std::string> const& customOptions() const {
             return m_customOptions;
         }
     };
 
     /**
-     * Parses provided reporter spec string into
+     * Parses provided reporter spec string into actual `ReporterSpec`
      *
      * Returns empty optional on errors, e.g.
      *  * field that is not first and not a key+value pair

src/catch2/internal/catch_run_context.cpp

@@ -196,6 +196,8 @@ namespace Catch {
                 auto getGenerator() const -> GeneratorBasePtr const& override {
                     return m_generator;
                 }
+
+                bool isFilteredImpl() const override { return m_isFiltered; }
             };
         } // namespace
     }
@@ -540,17 +542,6 @@ namespace Catch {
         SourceLineInfo lineInfo,
         Generators::GeneratorBasePtr&& generator ) {
 
-        // TBD: Do we want to avoid the warning if the generator is filtered?
-        if ( m_config->warnAboutInfiniteGenerators() &&
-             !generator->isFinite() ) {
-            // We want the semantics of `FAIL()`, but we inline it
-            // to avoid issues with conditionally prefixed macros
-            INTERNAL_CATCH_MSG( "FAIL",
-                                Catch::ResultWas::ExplicitFailure,
-                                Catch::ResultDisposition::Normal,
-                                "GENERATE() would run infinitely" );
-        }
-
         auto nameAndLoc = TestCaseTracking::NameAndLocation( static_cast<std::string>( generatorName ), lineInfo );
         auto& currentTracker = m_trackerContext.currentTracker();
         assert(
@@ -563,11 +554,24 @@ namespace Catch {
                 m_trackerContext,
                 &currentTracker,
                 CATCH_MOVE( generator ) );
-        auto ret = newTracker.get();
+
+        // The warning shouldn't fire if the generator is infinite, **but** filtered down.
+        if ( m_config->warnAboutInfiniteGenerators() &&
+             !newTracker->m_generator->isFinite() &&
+             !newTracker->isFiltered() ) {
+            // We want the semantics of `FAIL()`, but we inline it
+            // to avoid issues with conditionally prefixed macros
+            INTERNAL_CATCH_MSG( "FAIL",
+                                Catch::ResultWas::ExplicitFailure,
+                                Catch::ResultDisposition::Normal,
+                                "GENERATE() would run infinitely" );
+        }
+
+        auto returnPtr = newTracker.get();
         currentTracker.addChild( CATCH_MOVE( newTracker ) );
 
-        ret->open();
-        return ret;
+        returnPtr->open();
+        return returnPtr;
     }
 
     bool RunContext::testForMissingAssertions(Counts& assertions) {

src/catch2/internal/catch_template_test_registry.hpp

@@ -127,6 +127,7 @@
         namespace INTERNAL_CATCH_MAKE_NAMESPACE(TestName) {                                     \
             INTERNAL_CATCH_TYPE_GEN                                                  \
             INTERNAL_CATCH_NTTP_GEN(INTERNAL_CATCH_REMOVE_PARENS(Signature))         \
+            INTERNAL_CATCH_NTTP_REWRAP_GEN(INTERNAL_CATCH_REMOVE_PARENS(Signature))  \
             template<typename... Types>                               \
             struct TestName {                                         \
                 void reg_tests() {                                          \
@@ -139,7 +140,7 @@
                 }                                                     \
             };                                                        \
             static const int INTERNAL_CATCH_UNIQUE_NAME( globalRegistrar ) = [](){ \
-                using TestInit = typename create<TestName, decltype(get_wrapper<INTERNAL_CATCH_REMOVE_PARENS(TmplTypes)>(Catch::Detail::priority_tag<1>{})), TypeList<INTERNAL_CATCH_MAKE_TYPE_LISTS_FROM_TYPES(INTERNAL_CATCH_REMOVE_PARENS(TypesList))>>::type; \
+                using TestInit = typename create<TestName, decltype(get_template_wrapper<INTERNAL_CATCH_REMOVE_PARENS(TmplTypes)>(Catch::Detail::priority_tag<1>{})), TypeList<INTERNAL_CATCH_MAKE_TYPE_LISTS_FROM_TYPES(INTERNAL_CATCH_REMOVE_PARENS(TypesList))>>::type; \
                 TestInit t;                                           \
                 t.reg_tests();                                        \
                 return 0;                                             \
@@ -223,7 +224,7 @@
             static const int INTERNAL_CATCH_UNIQUE_NAME( globalRegistrar ) = [](){\
                 TestNameClass<INTERNAL_CATCH_MAKE_TYPE_LISTS_FROM_TYPES(__VA_ARGS__)>();\
                 return 0;\
-        }();\
+            }();\
         }\
         }\
         CATCH_INTERNAL_STOP_WARNINGS_SUPPRESSION \
@@ -259,6 +260,7 @@
     namespace INTERNAL_CATCH_MAKE_NAMESPACE(TestNameClass) {\
         INTERNAL_CATCH_TYPE_GEN                  \
         INTERNAL_CATCH_NTTP_GEN(INTERNAL_CATCH_REMOVE_PARENS(Signature))\
+        INTERNAL_CATCH_NTTP_REWRAP_GEN(INTERNAL_CATCH_REMOVE_PARENS(Signature))\
         template<typename...Types>\
         struct TestNameClass{\
             void reg_tests(){\
@@ -271,7 +273,7 @@
             }\
         };\
         static const int INTERNAL_CATCH_UNIQUE_NAME( globalRegistrar ) = [](){\
-            using TestInit = typename create<TestNameClass, decltype(get_wrapper<INTERNAL_CATCH_REMOVE_PARENS(TmplTypes)>(Catch::Detail::priority_tag<1>{})), TypeList<INTERNAL_CATCH_MAKE_TYPE_LISTS_FROM_TYPES(INTERNAL_CATCH_REMOVE_PARENS(TypesList))>>::type;\
+            using TestInit = typename create<TestNameClass, decltype(get_template_wrapper<INTERNAL_CATCH_REMOVE_PARENS(TmplTypes)>(Catch::Detail::priority_tag<1>{})), TypeList<INTERNAL_CATCH_MAKE_TYPE_LISTS_FROM_TYPES(INTERNAL_CATCH_REMOVE_PARENS(TypesList))>>::type;\
             TestInit t;\
             t.reg_tests();\
             return 0;\

src/catch2/internal/catch_test_case_registry_impl.cpp

@@ -22,6 +22,9 @@
 namespace Catch {
 
     namespace {
+        // Picked small-ish number at random
+        static size_t kInitialTestCount = 120;
+
         static void enforceNoDuplicateTestCases(
             std::vector<TestCaseHandle> const& tests ) {
             auto testInfoCmp = []( TestCaseInfo const* lhs,
@@ -123,17 +126,26 @@ namespace Catch {
         return getRegistryHub().getTestCaseRegistry().getAllTestsSorted( config );
     }
 
+
+    TestRegistry::TestRegistry() {
+        // We pre-reserve some reasonable number of tests to avoid the
+        // initial geometric growth churning during test registration.
+        m_handles.reserve( kInitialTestCount );
+        m_test_infos.reserve( kInitialTestCount );
+        m_invokers.reserve( kInitialTestCount );
+    }
     TestRegistry::~TestRegistry() = default;
 
     void TestRegistry::registerTest(Detail::unique_ptr<TestCaseInfo> testInfo, Detail::unique_ptr<ITestInvoker> testInvoker) {
         m_handles.emplace_back(testInfo.get(), testInvoker.get());
-        m_viewed_test_infos.push_back(testInfo.get());
-        m_owned_test_infos.push_back(CATCH_MOVE(testInfo));
+        m_test_infos.push_back(CATCH_MOVE(testInfo));
         m_invokers.push_back(CATCH_MOVE(testInvoker));
     }
 
-    std::vector<TestCaseInfo*> const& TestRegistry::getAllInfos() const {
-        return m_viewed_test_infos;
+    void TestRegistry::enableFilenameTags() {
+        for (auto& info : m_test_infos) {
+            info->addFilenameTag();
+        }
     }
 
     std::vector<TestCaseHandle> const& TestRegistry::getAllTests() const {

src/catch2/internal/catch_test_case_registry_impl.hpp

@@ -31,20 +31,20 @@ namespace Catch {
     class TestRegistry final : public ITestCaseRegistry {
     public:
         void registerTest( Detail::unique_ptr<TestCaseInfo> testInfo, Detail::unique_ptr<ITestInvoker> testInvoker );
+        void enableFilenameTags() override;
 
-        std::vector<TestCaseInfo*> const& getAllInfos() const override;
         std::vector<TestCaseHandle> const& getAllTests() const override;
         std::vector<TestCaseHandle> const& getAllTestsSorted( IConfig const& config ) const override;
 
+        TestRegistry();
         ~TestRegistry() override; // = default
 
     private:
-        std::vector<Detail::unique_ptr<TestCaseInfo>> m_owned_test_infos;
-        // Keeps a materialized vector for `getAllInfos`.
-        // We should get rid of that eventually (see interface note)
-        std::vector<TestCaseInfo*> m_viewed_test_infos;
-
+        // Owns the test infos for handles
+        std::vector<Detail::unique_ptr<TestCaseInfo>> m_test_infos;
+        // Owns the test invokers for handles
         std::vector<Detail::unique_ptr<ITestInvoker>> m_invokers;
+
         std::vector<TestCaseHandle> m_handles;
         mutable TestRunOrder m_currentSortOrder = TestRunOrder::Declared;
         mutable std::vector<TestCaseHandle> m_sortedFunctions;

src/catch2/internal/catch_test_case_tracker.cpp

@@ -167,6 +167,28 @@ namespace TestCaseTracking {
         m_ctx.setCurrentTracker( this );
     }
 
+    bool SectionTracker::isFilteredImpl() const {
+        // TBD: This is currently _very_ similar to the block in `isComplete`.
+        //      Is this neccessarily that way, or just accident of current semantics?
+        const size_t filterIndex =
+            m_newStyleFilters ? m_allTrackerDepth : m_sectionOnlyDepth;
+
+        if ( filterIndex < m_filterRef->size() ) {
+            // 1) New style filter must explicitly target section
+            if ( m_newStyleFilters && ( *m_filterRef )[filterIndex].type !=
+                                          PathFilter::For::Section ) {
+                return true;
+            }
+            // 2) Both style filters must match the trimmed name exactly
+            if ( m_trimmed_name !=
+                 StringRef( ( *m_filterRef )[filterIndex].filter ) ) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
     SectionTracker::SectionTracker( NameAndLocation&& nameAndLocation, TrackerContext& ctx, ITracker* parent )
     :   TrackerBase( CATCH_MOVE(nameAndLocation), ctx, parent ),
         m_trimmed_name(trim(StringRef(ITracker::nameAndLocation().name)))

src/catch2/internal/catch_test_case_tracker.hpp

@@ -12,6 +12,7 @@
 #include <catch2/internal/catch_source_line_info.hpp>
 #include <catch2/internal/catch_unique_ptr.hpp>
 #include <catch2/internal/catch_stringref.hpp>
+#include <catch2/internal/catch_path_filter.hpp>
 
 #include <string>
 #include <vector>
@@ -81,6 +82,8 @@ namespace TestCaseTracking {
 
         using Children = std::vector<ITrackerPtr>;
 
+        virtual bool isFilteredImpl() const = 0;
+
     protected:
         enum CycleState {
             NotStarted,
@@ -178,6 +181,20 @@ namespace TestCaseTracking {
          * for internal debug checks.
          */
         virtual bool isGeneratorTracker() const;
+
+        /**
+         * Returns true if the concrete tracker instance has a filter that applies to it.
+         */
+        bool isFiltered() const {
+            // Fast path: are there even filters for tracker in this position?
+            const size_t filter_depth =
+                m_newStyleFilters ? m_allTrackerDepth : m_sectionOnlyDepth;
+            if ( m_filterRef->size() <= filter_depth ) { return false; }
+
+            // Slow path: If there are filters, ask the concrete tracker.
+            //            This handles things like match-all filters for that tracker.
+            return isFilteredImpl();
+        }
     };
 
     class TrackerContext {
@@ -233,6 +250,8 @@ namespace TestCaseTracking {
         // to not own the name, the name still has to outlive the `ITracker` parent, so
         // this should still be safe.
         StringRef m_trimmed_name;
+
+        bool isFilteredImpl() const override;
     public:
         SectionTracker( NameAndLocation&& nameAndLocation, TrackerContext& ctx, ITracker* parent );
 

src/catch2/matchers/catch_matchers_string.cpp

@@ -9,70 +9,106 @@
 #include <catch2/internal/catch_string_manip.hpp>
 #include <catch2/catch_tostring.hpp>
 #include <catch2/internal/catch_move_and_forward.hpp>
+#include <catch2/internal/catch_case_insensitive_comparisons.hpp>
 
 #include <regex>
 
 namespace Catch {
+
+    namespace {
+        constexpr StringRef caseSensitivitySuffix( CaseSensitive caseSensitivity ) {
+            return caseSensitivity == CaseSensitive::Yes
+                       ? StringRef{}
+                       : " (case insensitive)"_sr;
+        }
+    } // namespace
+
 namespace Matchers {
 
-    CasedString::CasedString( std::string const& str, CaseSensitive caseSensitivity )
-    :   m_caseSensitivity( caseSensitivity ),
-        m_str( adjustString( str ) )
-    {}
-    std::string CasedString::adjustString( std::string const& str ) const {
-        return m_caseSensitivity == CaseSensitive::No
-               ? toLower( str )
-               : str;
-    }
-    StringRef CasedString::caseSensitivitySuffix() const {
-        return m_caseSensitivity == CaseSensitive::Yes
-                   ? StringRef()
-                   : " (case insensitive)"_sr;
-    }
+    StringMatcherBase::StringMatcherBase( std::string target,
+                                          StringRef operation,
+                                          CaseSensitive caseSensitivity ):
+        m_target( CATCH_MOVE( target ) ),
+        m_operation( operation ),
+        m_caseSensitivity( caseSensitivity ) {}
 
 
-    StringMatcherBase::StringMatcherBase( StringRef operation, CasedString const& comparator )
-    : m_comparator( comparator ),
-      m_operation( operation ) {
-    }
-
     std::string StringMatcherBase::describe() const {
         std::string description;
-        description.reserve(5 + m_operation.size() + m_comparator.m_str.size() +
-                                    m_comparator.caseSensitivitySuffix().size());
+        description.reserve(5 + m_operation.size() + m_target.size() +
+                                    caseSensitivitySuffix(m_caseSensitivity).size());
         description += m_operation;
         description += ": \"";
-        description += m_comparator.m_str;
+        description += m_target;
         description += '"';
-        description += m_comparator.caseSensitivitySuffix();
+        description += caseSensitivitySuffix(m_caseSensitivity);
         return description;
     }
 
-    StringEqualsMatcher::StringEqualsMatcher( CasedString const& comparator ) : StringMatcherBase( "equals"_sr, comparator ) {}
+
+    StringEqualsMatcher::StringEqualsMatcher( std::string comparator, CaseSensitive caseSensitivity ):
+        StringMatcherBase( CATCH_MOVE( comparator ), "equals"_sr, caseSensitivity ) {}
 
     bool StringEqualsMatcher::match( std::string const& source ) const {
-        return m_comparator.adjustString( source ) == m_comparator.m_str;
+        if (m_caseSensitivity == CaseSensitive::Yes) {
+            return m_target == source;
+        }
+        if (m_target.size() != source.size()) { return false; }
+        Catch::Detail::CaseInsensitiveEqualTo eq;
+        return eq( m_target, source );
     }
 
 
-    StringContainsMatcher::StringContainsMatcher( CasedString const& comparator ) : StringMatcherBase( "contains"_sr, comparator ) {}
+    StringContainsMatcher::StringContainsMatcher(
+        std::string comparator, CaseSensitive caseSensitivity ):
+        StringMatcherBase( CATCH_MOVE( comparator ), "contains"_sr, caseSensitivity ) {}
 
     bool StringContainsMatcher::match( std::string const& source ) const {
-        return contains( m_comparator.adjustString( source ), m_comparator.m_str );
+        if ( m_caseSensitivity == CaseSensitive::Yes ) {
+            return contains( source, m_target );
+        }
+        if ( source.size() < m_target.size() ) { return false; }
+        StringRef as_ref( source );
+        // The worst case of this is O(m*n), which is terrible, BUT:
+        //  * The average case is much better, the worst case only happens rarely
+        //  * We can implement BMH/other better searchers later if it matters
+        Catch::Detail::CaseInsensitiveEqualTo eq;
+        for (size_t i = 0; i < source.size(); ++i) {
+            const auto substr = as_ref.substr( i, m_target.size() );
+            bool found = eq( substr, m_target );
+            if ( found ) { return true; }
+        }
+        return false;
     }
 
 
-    StartsWithMatcher::StartsWithMatcher( CasedString const& comparator ) : StringMatcherBase( "starts with"_sr, comparator ) {}
+    StartsWithMatcher::StartsWithMatcher( std::string comparator,
+                                          CaseSensitive caseSensitivity ):
+        StringMatcherBase( CATCH_MOVE( comparator ), "starts with"_sr, caseSensitivity ) {}
 
     bool StartsWithMatcher::match( std::string const& source ) const {
-        return startsWith( m_comparator.adjustString( source ), m_comparator.m_str );
+        if ( m_caseSensitivity == CaseSensitive::Yes ) {
+            return startsWith( source, m_target );
+        }
+        if (source.size() < m_target.size()) { return false; }
+        Catch::Detail::CaseInsensitiveEqualTo eq;
+        return eq(
+            StringRef( source ).substr( 0, m_target.size() ), m_target );
     }
 
 
-    EndsWithMatcher::EndsWithMatcher( CasedString const& comparator ) : StringMatcherBase( "ends with"_sr, comparator ) {}
+    EndsWithMatcher::EndsWithMatcher( std::string comparator,
+                                      CaseSensitive caseSensitivity ):
+        StringMatcherBase( CATCH_MOVE( comparator ), "ends with"_sr, caseSensitivity ) {}
 
     bool EndsWithMatcher::match( std::string const& source ) const {
-        return endsWith( m_comparator.adjustString( source ), m_comparator.m_str );
+        if ( m_caseSensitivity == CaseSensitive::Yes ) {
+            return endsWith( source, m_target );
+        }
+        if ( source.size() < m_target.size() ) { return false; }
+        Catch::Detail::CaseInsensitiveEqualTo eq;
+        const size_t start_point = source.size() - m_target.size();
+        return eq( StringRef( source ).substr( start_point, m_target.size() ), m_target );
     }
 
 
@@ -93,21 +129,21 @@ namespace Matchers {
     }
 
 
-    StringEqualsMatcher Equals( std::string const& str, CaseSensitive caseSensitivity ) {
-        return StringEqualsMatcher( CasedString( str, caseSensitivity) );
+    StringEqualsMatcher Equals( std::string str, CaseSensitive caseSensitivity ) {
+        return StringEqualsMatcher( CATCH_MOVE( str ), caseSensitivity );
     }
-    StringContainsMatcher ContainsSubstring( std::string const& str, CaseSensitive caseSensitivity ) {
-        return StringContainsMatcher( CasedString( str, caseSensitivity) );
+    StringContainsMatcher ContainsSubstring( std::string str, CaseSensitive caseSensitivity ) {
+        return StringContainsMatcher( CATCH_MOVE( str ), caseSensitivity );
     }
-    EndsWithMatcher EndsWith( std::string const& str, CaseSensitive caseSensitivity ) {
-        return EndsWithMatcher( CasedString( str, caseSensitivity) );
+    EndsWithMatcher EndsWith( std::string str, CaseSensitive caseSensitivity ) {
+        return EndsWithMatcher( CATCH_MOVE( str ), caseSensitivity );
     }
-    StartsWithMatcher StartsWith( std::string const& str, CaseSensitive caseSensitivity ) {
-        return StartsWithMatcher( CasedString( str, caseSensitivity) );
+    StartsWithMatcher StartsWith( std::string str, CaseSensitive caseSensitivity ) {
+        return StartsWithMatcher( CATCH_MOVE( str ), caseSensitivity );
     }
 
-    RegexMatcher Matches(std::string const& regex, CaseSensitive caseSensitivity) {
-        return RegexMatcher(regex, caseSensitivity);
+    RegexMatcher Matches(std::string regex, CaseSensitive caseSensitivity) {
+        return RegexMatcher( CATCH_MOVE( regex ), caseSensitivity );
     }
 
 } // namespace Matchers

src/catch2/matchers/catch_matchers_string.hpp

@@ -17,44 +17,40 @@
 namespace Catch {
 namespace Matchers {
 
-    struct CasedString {
-        CasedString( std::string const& str, CaseSensitive caseSensitivity );
-        std::string adjustString( std::string const& str ) const;
-        StringRef caseSensitivitySuffix() const;
-
-        CaseSensitive m_caseSensitivity;
-        std::string m_str;
-    };
-
     class StringMatcherBase : public MatcherBase<std::string> {
     protected:
-        CasedString m_comparator;
+        std::string m_target;
         StringRef m_operation;
+        CaseSensitive m_caseSensitivity;
 
+        StringMatcherBase( std::string target,
+                           StringRef operation,
+                           CaseSensitive caseSensitivity );
     public:
-        StringMatcherBase( StringRef operation,
-                           CasedString const& comparator );
         std::string describe() const override;
     };
 
     class StringEqualsMatcher final : public StringMatcherBase {
     public:
-        StringEqualsMatcher( CasedString const& comparator );
+        StringEqualsMatcher( std::string comparator, CaseSensitive caseSensitivity );
         bool match( std::string const& source ) const override;
     };
     class StringContainsMatcher final : public StringMatcherBase {
     public:
-        StringContainsMatcher( CasedString const& comparator );
+        StringContainsMatcher( std::string comparator,
+                               CaseSensitive caseSensitivity );
         bool match( std::string const& source ) const override;
     };
     class StartsWithMatcher final : public StringMatcherBase {
     public:
-        StartsWithMatcher( CasedString const& comparator );
+        StartsWithMatcher( std::string comparator,
+                           CaseSensitive caseSensitivity );
         bool match( std::string const& source ) const override;
     };
     class EndsWithMatcher final : public StringMatcherBase {
     public:
-        EndsWithMatcher( CasedString const& comparator );
+        EndsWithMatcher( std::string comparator,
+                         CaseSensitive caseSensitivity );
         bool match( std::string const& source ) const override;
     };
 
@@ -69,15 +65,15 @@ namespace Matchers {
     };
 
     //! Creates matcher that accepts strings that are exactly equal to `str`
-    StringEqualsMatcher Equals( std::string const& str, CaseSensitive caseSensitivity = CaseSensitive::Yes );
+    StringEqualsMatcher Equals( std::string str, CaseSensitive caseSensitivity = CaseSensitive::Yes );
     //! Creates matcher that accepts strings that contain `str`
-    StringContainsMatcher ContainsSubstring( std::string const& str, CaseSensitive caseSensitivity = CaseSensitive::Yes );
+    StringContainsMatcher ContainsSubstring( std::string str, CaseSensitive caseSensitivity = CaseSensitive::Yes );
     //! Creates matcher that accepts strings that _end_ with `str`
-    EndsWithMatcher EndsWith( std::string const& str, CaseSensitive caseSensitivity = CaseSensitive::Yes );
+    EndsWithMatcher EndsWith( std::string str, CaseSensitive caseSensitivity = CaseSensitive::Yes );
     //! Creates matcher that accepts strings that _start_ with `str`
-    StartsWithMatcher StartsWith( std::string const& str, CaseSensitive caseSensitivity = CaseSensitive::Yes );
+    StartsWithMatcher StartsWith( std::string str, CaseSensitive caseSensitivity = CaseSensitive::Yes );
     //! Creates matcher that accepts strings matching `regex`
-    RegexMatcher Matches( std::string const& regex, CaseSensitive caseSensitivity = CaseSensitive::Yes );
+    RegexMatcher Matches( std::string regex, CaseSensitive caseSensitivity = CaseSensitive::Yes );
 
 } // namespace Matchers
 } // namespace Catch

src/catch2/meson.build

@@ -47,6 +47,7 @@ benchmark_headers = [
 ]
 
 benchmark_sources = files(
+  'benchmark/catch_benchmark.cpp',
   'benchmark/catch_chronometer.cpp',
   'benchmark/detail/catch_analyse.cpp',
   'benchmark/detail/catch_benchmark_function.cpp',

src/catch2/reporters/catch_reporter_common_base.cpp

@@ -19,6 +19,7 @@ namespace Catch {
         m_wrapped_stream( CATCH_MOVE(config).takeStream() ),
         m_stream( m_wrapped_stream->stream() ),
         m_colour( makeColourImpl( config.colourMode(), m_wrapped_stream.get() ) ),
+        m_verbosity( config.verbosity() ),
         m_customOptions( config.customOptions() )
     {}
 
@@ -26,12 +27,12 @@ namespace Catch {
 
     void ReporterBase::listReporters(
         std::vector<ReporterDescription> const& descriptions ) {
-        defaultListReporters( m_stream, descriptions, m_config->verbosity() );
+        defaultListReporters( m_stream, descriptions, m_verbosity );
     }
 
     void ReporterBase::listListeners(
         std::vector<ListenerDescription> const& descriptions ) {
-        defaultListListeners( m_stream, descriptions, m_config->verbosity() );
+        defaultListListeners( m_stream, descriptions, m_verbosity );
     }
 
     void ReporterBase::listTests(std::vector<TestCaseHandle> const& tests) {
@@ -39,11 +40,11 @@ namespace Catch {
                          m_colour.get(),
                          tests,
                          m_config->hasTestFilters(),
-                         m_config->verbosity());
+                         m_verbosity);
     }
 
     void ReporterBase::listTags(std::vector<TagInfo> const& tags) {
-        defaultListTags( m_stream, tags, m_config->hasTestFilters(), m_config->verbosity() );
+        defaultListTags( m_stream, tags, m_config->hasTestFilters(), m_verbosity );
     }
 
 } // namespace Catch

src/catch2/reporters/catch_reporter_common_base.hpp

@@ -35,6 +35,8 @@ namespace Catch {
         std::ostream& m_stream;
         //! Colour implementation this reporter was configured for
         Detail::unique_ptr<ColourImpl> m_colour;
+        //! Verbosity configured for this reporter
+        Verbosity m_verbosity;
         //! The custom reporter options user passed down to the reporter
         std::map<std::string, std::string> m_customOptions;
 

src/catch2/reporters/catch_reporter_json.cpp

@@ -16,6 +16,8 @@
 
 namespace Catch {
     namespace {
+        static size_t kJsonOutputVersion = 2;
+
         void writeSourceInfo( JsonObjectWriter& writer,
                               SourceLineInfo const& sourceInfo ) {
             auto source_location_writer =
@@ -58,7 +60,7 @@ namespace Catch {
         m_writers.emplace( Writer::Object );
         auto& writer = m_objectWriters.top();
 
-        writer.write( "version"_sr ).write( 1 );
+        writer.write( "version"_sr ).write( kJsonOutputVersion );
 
         {
             auto metadata_writer = writer.write( "metadata"_sr ).writeObject();
@@ -344,14 +346,18 @@ namespace Catch {
             auto const& info = test.getTestCaseInfo();
 
             desc_writer.write( "name"_sr ).write( info.name );
-            desc_writer.write( "class-name"_sr ).write( info.className );
-            {
+            if (!info.className.empty()) {
+                desc_writer.write( "class-name"_sr ).write( info.className );
+            }
+            if ( m_verbosity >= Verbosity::Normal ) {
                 auto tag_writer = desc_writer.write( "tags"_sr ).writeArray();
                 for ( auto const& tag : info.tags ) {
                     tag_writer.write( tag.original );
                 }
             }
-            writeSourceInfo( desc_writer, info.lineInfo );
+            if ( m_verbosity >= Verbosity::High) {
+                writeSourceInfo( desc_writer, info.lineInfo );
+            }
         }
     }
     void JsonReporter::listTags( std::vector<TagInfo> const& tags ) {

src/catch2/reporters/catch_reporter_json.hpp

@@ -85,9 +85,6 @@ namespace Catch {
         std::stack<Writer> m_writers{};
 
         bool m_startedListing = false;
-
-        // std::size_t m_sectionDepth = 0;
-        // std::size_t m_sectionStarted = 0;
     };
 } // namespace Catch
 

tests/CMakeLists.txt

@@ -184,6 +184,13 @@ set_tests_properties(List::Tests::Output PROPERTIES
   PASS_REGULAR_EXPRESSION "[0-9]+ test cases"
   FAIL_REGULAR_EXPRESSION "Hidden Test"
 )
+
+add_test(NAME VerbosityIsPerReporter COMMAND $<TARGET_FILE:SelfTest> --list-tests --verbosity high --reporter console::verbosity=quiet)
+set_tests_properties(VerbosityIsPerReporter
+  PROPERTIES
+    FAIL_REGULAR_EXPRESSION "\.cpp"
+)
+
 # This should be equivalent to the old --list-test-names-only and be usable
 # with --input-file.
 add_test(NAME List::Tests::Quiet COMMAND $<TARGET_FILE:SelfTest> --list-tests --verbosity quiet)
@@ -193,6 +200,7 @@ set_tests_properties(List::Tests::Quiet PROPERTIES
   PASS_REGULAR_EXPRESSION "\"#1905 -- test spec parser properly clears internal state between compound tests\"[\r\n]"
   FAIL_REGULAR_EXPRESSION "[ \t]\"#1905 -- test spec parser properly clears internal state between compound tests\""
 )
+
 add_test(NAME List::Tests::ExitCode COMMAND $<TARGET_FILE:SelfTest> --list-tests --verbosity high)
 add_test(NAME List::Tests::XmlOutput COMMAND $<TARGET_FILE:SelfTest> --list-tests --verbosity high -r xml)
 set_tests_properties(List::Tests::XmlOutput PROPERTIES
@@ -200,6 +208,21 @@ set_tests_properties(List::Tests::XmlOutput PROPERTIES
   FAIL_REGULAR_EXPRESSION "[0-9]+ test cases"
 )
 
+add_test(NAME List::Tests::Json::Normal COMMAND $<TARGET_FILE:SelfTest> --list-tests -r json)
+set_tests_properties(List::Tests::Json::Normal PROPERTIES
+  PASS_REGULAR_EXPRESSION "\"tags\": \\["
+  FAIL_REGULAR_EXPRESSION "\"source-location\": {"
+)
+add_test(NAME List::Tests::Json::Quiet COMMAND $<TARGET_FILE:SelfTest> --list-tests -r json::verbosity=quiet)
+set_tests_properties(List::Tests::Json::Quiet PROPERTIES
+  PASS_REGULAR_EXPRESSION "\"name\": \""
+  FAIL_REGULAR_EXPRESSION "\"tags\": \\["
+)
+add_test(NAME List::Tests::Json::High COMMAND $<TARGET_FILE:SelfTest> --list-tests -r json::verbosity=high)
+set_tests_properties(List::Tests::Json::High PROPERTIES
+  PASS_REGULAR_EXPRESSION "\"source-location\": {"
+)
+
 add_test(NAME List::Tags::Output COMMAND $<TARGET_FILE:SelfTest> --list-tags)
 set_tests_properties(List::Tags::Output PROPERTIES
   PASS_REGULAR_EXPRESSION "[0-9]+ tags"
@@ -210,6 +233,11 @@ set_tests_properties(List::Tags::XmlOutput PROPERTIES
   PASS_REGULAR_EXPRESSION "<Count>18</Count>"
   FAIL_REGULAR_EXPRESSION "[0-9]+ tags"
 )
+add_test(NAME List::Tags::JsonOutput COMMAND $<TARGET_FILE:SelfTest> --list-tags -r json)
+set_tests_properties(List::Tags::JsonOutput PROPERTIES
+  PASS_REGULAR_EXPRESSION "\"count\": 18"
+  FAIL_REGULAR_EXPRESSION "[0-9]+ tags"
+)
 
 add_test(NAME List::Reporters::Output COMMAND $<TARGET_FILE:SelfTest> --list-reporters)
 set_tests_properties(List::Reporters::Output PROPERTIES PASS_REGULAR_EXPRESSION "Available reporters:")
@@ -219,6 +247,12 @@ set_tests_properties(List::Reporters::XmlOutput PROPERTIES
   PASS_REGULAR_EXPRESSION "<Name>compact</Name>"
   FAIL_REGULAR_EXPRESSION "Available reporters:"
 )
+add_test(NAME List::Reporters::JsonOutput COMMAND $<TARGET_FILE:SelfTest> --list-reporters -r json)
+set_tests_properties(List::Reporters::JsonOutput PROPERTIES
+  PASS_REGULAR_EXPRESSION "\"name\": \"compact\""
+  FAIL_REGULAR_EXPRESSION "Available reporters:"
+)
+
 
 add_test(NAME List::Listeners::Output
   COMMAND
@@ -243,6 +277,18 @@ set_tests_properties(List::Listeners::XmlOutput
     PASS_REGULAR_EXPRESSION "<RegisteredListeners>"
     FAIL_REGULAR_EXPRESSION "Registered listeners:"
 )
+add_test(NAME List::Listeners::JsonOutput
+  COMMAND
+    $<TARGET_FILE:SelfTest>
+      --list-listeners
+      --reporter json
+)
+set_tests_properties(List::Listeners::JsonOutput
+  PROPERTIES
+    PASS_REGULAR_EXPRESSION "\"listeners\": \\["
+    FAIL_REGULAR_EXPRESSION "Registered listeners:"
+)
+
 
 add_test(NAME NoAssertions COMMAND $<TARGET_FILE:SelfTest> -w NoAssertions "An empty test with no assertions")
 set_tests_properties(NoAssertions PROPERTIES PASS_REGULAR_EXPRESSION "No assertions in test case")
@@ -440,19 +486,6 @@ set_tests_properties("Benchmarking::SkipBenchmarkMacros"
     FAIL_REGULAR_EXPRESSION "benchmark name"
 )
 
-add_test(NAME "Benchmarking::FailureReporting::OptimizedOut"
-  COMMAND
-    $<TARGET_FILE:SelfTest> "Failing benchmarks" -c "empty" -r xml
-  # This test only makes sense with the optimizer being enabled when
-  # the tests are being compiled.
-  CONFIGURATIONS Release
-)
-set_tests_properties("Benchmarking::FailureReporting::OptimizedOut"
-  PROPERTIES
-    PASS_REGULAR_EXPRESSION "could not measure benchmark\, maybe it was optimized away"
-    FAIL_REGULAR_EXPRESSION "successes=\"1\""
-)
-
 add_test(NAME "Benchmarking::FailureReporting::ThrowingBenchmark"
   COMMAND
     $<TARGET_FILE:SelfTest> "Failing benchmarks" -c "throw" -r xml
@@ -625,6 +658,20 @@ if(CATCH_ENABLE_CMAKE_HELPER_TESTS)
       COST 240
       LABELS "uses-python"
   )
+
+  add_test(NAME "CMakeHelper::PrepareCommandFragment"
+    COMMAND
+      "${CMAKE_COMMAND}"
+      "-DCATCH_ADD_TESTS_SCRIPT=${CATCH_DIR}/extras/CatchAddTests.cmake"
+      -P "${CMAKE_CURRENT_LIST_DIR}/TestScripts/DiscoverTests/TestPrepareCommandFragment.cmake"
+  )
+
+  add_test(NAME "CMakeHelper::DecomposeJsonArray"
+    COMMAND
+      "${CMAKE_COMMAND}"
+      "-DCATCH_ADD_TESTS_SCRIPT=${CATCH_DIR}/extras/CatchAddTests.cmake"
+      -P "${CMAKE_CURRENT_LIST_DIR}/TestScripts/DiscoverTests/TestDecomposeJsonArray.cmake"
+  )
 endif()
 
 foreach(reporterName # "Automake" - the simple .trs format does not support any kind of comments/metadata

tests/ExtraTests/CMakeLists.txt

@@ -21,6 +21,37 @@ set_tests_properties(TestSharding::OverlyLargeShardIndex
     PASS_REGULAR_EXPRESSION "The shard count \\(5\\) must be greater than the shard index \\(5\\)"
 )
 
+set(CATCH_SHARDING_WARNING_REGEX "Warning: using sharding .* with random order")
+
+add_test(
+  NAME TestSharding::WarningOnRandomOrderWithoutFixedSeed
+  COMMAND $<TARGET_FILE:SelfTest> --shard-index 0 --shard-count 2 --list-tests
+)
+set_tests_properties(TestSharding::WarningOnRandomOrderWithoutFixedSeed
+  PROPERTIES
+    PASS_REGULAR_EXPRESSION "${CATCH_SHARDING_WARNING_REGEX}"
+)
+
+add_test(
+  NAME TestSharding::NoWarningOnRandomOrderWithFixedSeed
+  COMMAND $<TARGET_FILE:SelfTest> --shard-index 0 --shard-count 2 --rng-seed 12345 --list-tests
+)
+set_tests_properties(TestSharding::NoWarningOnRandomOrderWithFixedSeed
+  PROPERTIES
+    FAIL_REGULAR_EXPRESSION "${CATCH_SHARDING_WARNING_REGEX}"
+)
+
+foreach(shardOrder decl lex)
+  add_test(
+    NAME TestSharding::NoWarningOn${shardOrder}OrderWithoutFixedSeed
+    COMMAND $<TARGET_FILE:SelfTest> --shard-index 0 --shard-count 2 --order ${shardOrder} --list-tests
+  )
+  set_tests_properties(TestSharding::NoWarningOn${shardOrder}OrderWithoutFixedSeed
+    PROPERTIES
+      FAIL_REGULAR_EXPRESSION "${CATCH_SHARDING_WARNING_REGEX}"
+  )
+endforeach()
+
 # The MinDuration reporting tests do not need separate compilation, but
 # they have non-trivial execution time, so they are categorized as
 # extra tests, so that they are run less.
@@ -526,29 +557,18 @@ set_tests_properties(TestSpecs::SkippingAllTestsFails
     WILL_FAIL ON
 )
 
-set(EXTRA_TEST_BINARIES
-  AllSkipped
-  PrefixedMacros
-  DisabledMacros
-  DisabledExceptions-DefaultHandler
-  DisabledExceptions-CustomHandler
-  FallbackStringifier
-  DisableStringification
-  PartialTestCaseEvents
-  DuplicatedTestCases-SameNameAndTags
-  DuplicatedTestCases-SameNameDifferentTags
-  DuplicatedTestCases-DuplicatedTestCaseMethods
-  NoTests
-  ListenersGetEventsBeforeReporters
-  MixingClearedAndUnclearedMessages
-#  DebugBreakMacros
-)
+add_executable(FastCompileMacros ${TESTS_DIR}/X07-FastCompileMacros.cpp)
+target_link_libraries(FastCompileMacros PRIVATE Catch2_buildall_interface)
+target_compile_definitions(FastCompileMacros PRIVATE CATCH_CONFIG_FAST_COMPILE)
 
-# Notice that we are modifying EXTRA_TEST_BINARIES destructively, do not
-# use it after this point!
-list(FILTER EXTRA_TEST_BINARIES EXCLUDE REGEX "DisabledExceptions.*")
-list(APPEND CATCH_TEST_TARGETS ${EXTRA_TEST_BINARIES})
-set(CATCH_TEST_TARGETS ${CATCH_TEST_TARGETS} PARENT_SCOPE)
+add_test(
+  NAME CompileConfiguration::FastCompile
+  COMMAND $<TARGET_FILE:FastCompileMacros>
+)
+set_tests_properties(CompileConfiguration::FastCompile
+  PROPERTIES
+    PASS_REGULAR_EXPRESSION "test cases:  6 \\| 1 passed \\| 1 failed \\| 4 failed as expected\nassertions: 13 \\| 6 passed \\| 2 failed \\| 5 failed as expected"
+)
 
 # This sets up a one-off executable that compiles against the amalgamated
 # files, and then runs it for a super simple check that the amalgamated
@@ -594,12 +614,79 @@ add_executable(InfiniteGenerators ${TESTS_DIR}/X95-InfiniteGenerators.cpp)
 target_link_libraries(InfiniteGenerators PRIVATE Catch2::Catch2WithMain)
 
 add_test(
-  NAME Warnings::InfiniteGenerators
+  NAME Warnings::InfiniteGenerators::NoFilterWarns
   COMMAND $<TARGET_FILE:InfiniteGenerators> --warn InfiniteGenerators
 )
-set_tests_properties(Warnings::InfiniteGenerators
+set_tests_properties(Warnings::InfiniteGenerators::NoFilterWarns
   PROPERTIES
     # One test case fails with infinite generator, but the other one runs
     PASS_REGULAR_EXPRESSION "test cases: 2 \\| 1 passed \\| 1 failed"
     TIMEOUT 5
 )
+
+add_test(
+  NAME Warnings::InfiniteGenerators::MatchAllFilterWarns
+  COMMAND $<TARGET_FILE:InfiniteGenerators>
+    --warn InfiniteGenerators
+    --path-filter g:*
+)
+set_tests_properties(Warnings::InfiniteGenerators::MatchAllFilterWarns
+  PROPERTIES
+    # One test case fails with infinite generator, but the other one runs
+    PASS_REGULAR_EXPRESSION "test cases: 2 \\| 1 passed \\| 1 failed"
+    TIMEOUT 5
+)
+
+add_test(
+  NAME Warnings::InfiniteGenerators::MatchOneFilterDoesntWarn
+  COMMAND $<TARGET_FILE:InfiniteGenerators>
+    --warn InfiniteGenerators
+    --path-filter g:1
+)
+set_tests_properties(Warnings::InfiniteGenerators::MatchOneFilterDoesntWarn
+  PROPERTIES
+    # One test case fails with infinite generator, but the other one runs
+    PASS_REGULAR_EXPRESSION "All tests passed \\(1 assertion in 2 test cases\\)"
+    TIMEOUT 5
+)
+
+add_test(
+  NAME Warnings::InfiniteGenerators::SectionFilterWarns
+  COMMAND $<TARGET_FILE:InfiniteGenerators>
+    --warn InfiniteGenerators
+    --section FooBarBaz
+)
+set_tests_properties(Warnings::InfiniteGenerators::SectionFilterWarns
+  PROPERTIES
+    # One test case fails with infinite generator, but the other one runs
+    PASS_REGULAR_EXPRESSION "test cases: 2 \\| 1 passed \\| 1 failed"
+    TIMEOUT 5
+)
+
+
+set(EXTRA_TEST_BINARIES
+  AllSkipped
+  PrefixedMacros
+  DisabledMacros
+  DisabledExceptions-DefaultHandler
+  DisabledExceptions-CustomHandler
+  FallbackStringifier
+  DisableStringification
+  PartialTestCaseEvents
+  DuplicatedTestCases-SameNameAndTags
+  DuplicatedTestCases-SameNameDifferentTags
+  DuplicatedTestCases-DuplicatedTestCaseMethods
+  NoTests
+  ListenersGetEventsBeforeReporters
+  MixingClearedAndUnclearedMessages
+  FastCompileMacros
+  InfiniteGenerators
+  ThreadSafetyTests
+#  DebugBreakMacros
+)
+
+# Notice that we are modifying EXTRA_TEST_BINARIES destructively, do not
+# use it after this point!
+list(FILTER EXTRA_TEST_BINARIES EXCLUDE REGEX "DisabledExceptions.*")
+list(APPEND CATCH_TEST_TARGETS ${EXTRA_TEST_BINARIES})
+set(CATCH_TEST_TARGETS ${CATCH_TEST_TARGETS} PARENT_SCOPE)

tests/ExtraTests/ToDo.txt

@@ -3,7 +3,6 @@ yet:
 
     CATCH_CONFIG_COUNTER                    // Use __COUNTER__ to generate unique names for test cases
     CATCH_CONFIG_WINDOWS_SEH                // Enable SEH handling on Windows
-    CATCH_CONFIG_FAST_COMPILE               // Sacrifices some (rather minor) features for compilation speed
     CATCH_CONFIG_POSIX_SIGNALS              // Enable handling POSIX signals
     CATCH_CONFIG_WINDOWS_CRTDBG             // Enable leak checking using Windows's CRT Debug Heap
     CATCH_CONFIG_DEFAULT_REPORTER

tests/ExtraTests/X07-FastCompileMacros.cpp

@@ -0,0 +1,63 @@
+
+//              Copyright Catch2 Authors
+// Distributed under the Boost Software License, Version 1.0.
+//   (See accompanying file LICENSE.txt or copy at
+//        https://www.boost.org/LICENSE_1_0.txt)
+
+// SPDX-License-Identifier: BSL-1.0
+
+/**\file
+ * Test that various basic macros work with CATCH_CONFIG_FAST_COMPILE.
+ *
+ * Note that the current checking is rather loose. We check that the
+ * macros compile, and that the test cases (don't) fail as they are
+ * supposed to.
+ */
+
+#include <catch2/catch_test_macros.hpp>
+
+#include <stdexcept>
+
+namespace {
+
+    [[noreturn]]
+    static void throws() {
+        throw std::runtime_error{ "sup" };
+    }
+    static void doesnt_throw() {}
+    [[noreturn]]
+    static int throws_i() {
+        throw std::runtime_error{ "sup" };
+    }
+
+} // namespace
+
+TEST_CASE( "Passing macros work" ) {
+    REQUIRE( 1 != 2 );
+    CHECK( 2 == 2 );
+    REQUIRE_THROWS( throws() );
+    REQUIRE_NOTHROW( doesnt_throw() );
+}
+
+TEST_CASE( "Failing macros work", "[!shouldfail]" ) {
+    CHECK( 1 != 2 );
+    CHECK( 2 == 2 );
+    CHECK( 3 == 2 );
+}
+
+TEST_CASE( "Failing NOTHROW works", "[!shouldfail]" ) {
+    REQUIRE_NOTHROW( throws() );
+}
+
+TEST_CASE( "Failing THROW works", "[!shouldfail]" ) {
+    REQUIRE_THROWS( doesnt_throw() );
+}
+
+TEST_CASE( "Unexpected exception in REQUIRE gets inverted properly",
+           "[!shouldfail]" ) {
+    REQUIRE( throws_i() == 1 );
+}
+
+TEST_CASE( "Unexpected exception in REQUIRE fails properly" ) {
+    REQUIRE( throws_i() == 2 );
+}

tests/ExtraTests/X95-InfiniteGenerators.cpp

@@ -33,6 +33,7 @@ namespace {
 
 TEST_CASE() {
     auto _ = GENERATE( make_infinite_generator() );
+    (void)_;
 }
 
 TEST_CASE() {

tests/SelfTest/Baselines/automake.sw.approved.txt

@@ -190,6 +190,9 @@ Nor would this
 :test-result: PASS Inequality checks that should succeed
 :test-result: PASS JsonWriter
 :test-result: PASS JsonWriter escapes characters in strings properly
+:test-result: PASS JsonWriter serializes non-finite FP using Python spelling - double
+:test-result: PASS JsonWriter serializes non-finite FP using Python spelling - float
+:test-result: PASS JsonWriter serializes numbers independently of the global locale
 :test-result: PASS Lambdas in assertions
 :test-result: PASS Less-than inequalities with different epsilons
 :test-result: PASS ManuallyRegistered

tests/SelfTest/Baselines/automake.sw.multi.approved.txt

@@ -188,6 +188,9 @@
 :test-result: PASS Inequality checks that should succeed
 :test-result: PASS JsonWriter
 :test-result: PASS JsonWriter escapes characters in strings properly
+:test-result: PASS JsonWriter serializes non-finite FP using Python spelling - double
+:test-result: PASS JsonWriter serializes non-finite FP using Python spelling - float
+:test-result: PASS JsonWriter serializes numbers independently of the global locale
 :test-result: PASS Lambdas in assertions
 :test-result: PASS Less-than inequalities with different epsilons
 :test-result: PASS ManuallyRegistered

tests/SelfTest/Baselines/compact.sw.approved.txt

@@ -631,7 +631,7 @@ Condition.tests.cpp:<line number>: passed: x == Approx( 1.3 ) for: 1.30000000000
 ==
 Approx( 1.30000000000000004 )
 Matchers.tests.cpp:<line number>: passed: testStringForMatching(), Equals( "this string contains 'abc' as a substring" ) for: "this string contains 'abc' as a substring" equals: "this string contains 'abc' as a substring"
-Matchers.tests.cpp:<line number>: passed: testStringForMatching(), Equals( "this string contains 'ABC' as a substring", Catch::CaseSensitive::No ) for: "this string contains 'abc' as a substring" equals: "this string contains 'abc' as a substring" (case insensitive)
+Matchers.tests.cpp:<line number>: passed: testStringForMatching(), Equals( "this string contains 'ABC' as a substring", Catch::CaseSensitive::No ) for: "this string contains 'abc' as a substring" equals: "this string contains 'ABC' as a substring" (case insensitive)
 Matchers.tests.cpp:<line number>: failed: testStringForMatching(), Equals( "this string contains 'ABC' as a substring" ) for: "this string contains 'abc' as a substring" equals: "this string contains 'ABC' as a substring"
 Matchers.tests.cpp:<line number>: failed: testStringForMatching(), Equals( "something else", Catch::CaseSensitive::No ) for: "this string contains 'abc' as a substring" equals: "something else" (case insensitive)
 ToStringGeneral.tests.cpp:<line number>: passed: ::Catch::Detail::stringify(WhatException{}) == "This exception has overridden what() method" for: "This exception has overridden what() method"
@@ -654,11 +654,11 @@ Matchers.tests.cpp:<line number>: passed: throwsDerivedException(), DerivedExcep
 Matchers.tests.cpp:<line number>: passed: throwsDerivedException(), DerivedException, MessageMatches( !StartsWith( "::what" ) ) for: DerivedException::what  matches "not starts with: "::what""
 Matchers.tests.cpp:<line number>: passed: throwsSpecialException( 2 ), SpecialException, MessageMatches( StartsWith( "Special" ) ) for: SpecialException::what  matches "starts with: "Special""
 Exception.tests.cpp:<line number>: passed: thisThrows(), "expected exception" for: "expected exception" equals: "expected exception"
-Exception.tests.cpp:<line number>: passed: thisThrows(), Equals( "expecteD Exception", Catch::CaseSensitive::No ) for: "expected exception" equals: "expected exception" (case insensitive)
+Exception.tests.cpp:<line number>: passed: thisThrows(), Equals( "expecteD Exception", Catch::CaseSensitive::No ) for: "expected exception" equals: "expecteD Exception" (case insensitive)
 Exception.tests.cpp:<line number>: passed: thisThrows(), StartsWith( "expected" ) for: "expected exception" starts with: "expected"
 Exception.tests.cpp:<line number>: passed: thisThrows(), EndsWith( "exception" ) for: "expected exception" ends with: "exception"
 Exception.tests.cpp:<line number>: passed: thisThrows(), ContainsSubstring( "except" ) for: "expected exception" contains: "except"
-Exception.tests.cpp:<line number>: passed: thisThrows(), ContainsSubstring( "exCept", Catch::CaseSensitive::No ) for: "expected exception" contains: "except" (case insensitive)
+Exception.tests.cpp:<line number>: passed: thisThrows(), ContainsSubstring( "exCept", Catch::CaseSensitive::No ) for: "expected exception" contains: "exCept" (case insensitive)
 ToString.tests.cpp:<line number>: passed: tos == tos for: { stringification failed with an exception: "Invalid" }
 ==
 { stringification failed with an exception: "Invalid" }
@@ -1248,6 +1248,26 @@ Json.tests.cpp:<line number>: passed: sstream.str() == "\"\\n\"" for: ""\n"" ==
 Json.tests.cpp:<line number>: passed: sstream.str() == "\"\\r\"" for: ""\r"" == ""\r""
 Json.tests.cpp:<line number>: passed: sstream.str() == "\"\\t\"" for: ""\t"" == ""\t""
 Json.tests.cpp:<line number>: passed: sstream.str() == "\"\\\\/\\t\\r\\n\"" for: ""\\/\t\r\n"" == ""\\/\t\r\n""
+Json.tests.cpp:<line number>: passed: sstream.str() == "NaN" for: "NaN" == "NaN"
+Json.tests.cpp:<line number>: passed: sstream.str() == "Infinity" for: "Infinity" == "Infinity"
+Json.tests.cpp:<line number>: passed: sstream.str() == "-Infinity" for: "-Infinity" == "-Infinity"
+Json.tests.cpp:<line number>: passed: sstream.str() == "NaN" for: "NaN" == "NaN"
+Json.tests.cpp:<line number>: passed: sstream.str() == "Infinity" for: "Infinity" == "Infinity"
+Json.tests.cpp:<line number>: passed: sstream.str() == "-Infinity" for: "-Infinity" == "-Infinity"
+Json.tests.cpp:<line number>: passed: sstream.str(), ContainsSubstring( "\"double\": 1.5," ) && ContainsSubstring( "\"int\": 1234567," ) && ContainsSubstring( "\"bool-1\": true," ) && ContainsSubstring( "\"bool-2\": false," ) && ContainsSubstring( "\"array\": [\n    2.5,\n    1234567\n  ]\n}" ) for: "{
+  "double": 1.5,
+  "int": 1234567,
+  "bool-1": true,
+  "bool-2": false,
+  "array": [
+    2.5,
+    1234567
+  ]
+}" ( contains: ""double": 1.5," and contains: ""int": 1234567," and contains: ""bool-1": true," and contains: ""bool-2": false," and contains: ""array": [
+    2.5,
+    1234567
+  ]
+}" )
 Compilation.tests.cpp:<line number>: passed: []() { return true; }() for: true
 Approx.tests.cpp:<line number>: passed: d <= Approx( 1.24 ) for: 1.22999999999999998
 <=
@@ -1511,9 +1531,9 @@ CmdLine.tests.cpp:<line number>: passed: config.noThrow == false for: false == f
 CmdLine.tests.cpp:<line number>: passed: config.reporterSpecifications.empty() for: true
 CmdLine.tests.cpp:<line number>: passed: !(cfg.hasTestFilters()) for: !false
 CmdLine.tests.cpp:<line number>: passed: cfg.getReporterSpecs().size() == 1 for: 1 == 1
-CmdLine.tests.cpp:<line number>: passed: cfg.getReporterSpecs()[0] == Catch::ReporterSpec{ expectedReporter, {}, {}, {} } for: {?} == {?}
+CmdLine.tests.cpp:<line number>: passed: cfg.getReporterSpecs()[0] == Catch::ReporterSpec{ expectedReporter, {}, {}, {}, {} } for: {?} == {?}
 CmdLine.tests.cpp:<line number>: passed: cfg.getProcessedReporterSpecs().size() == 1 for: 1 == 1
-CmdLine.tests.cpp:<line number>: passed: cfg.getProcessedReporterSpecs()[0] == Catch::ProcessedReporterSpec{ expectedReporter, std::string{}, Catch::ColourMode::PlatformDefault, {} } for: {?} == {?}
+CmdLine.tests.cpp:<line number>: passed: cfg.getProcessedReporterSpecs()[0] == Catch::ProcessedReporterSpec{ expectedReporter, std::string{}, Catch::ColourMode::PlatformDefault, Catch::Verbosity::Normal, {} } for: {?} == {?}
 CmdLine.tests.cpp:<line number>: passed: result for: {?}
 CmdLine.tests.cpp:<line number>: passed: cfg.hasTestFilters() for: true
 CmdLine.tests.cpp:<line number>: passed: cfg.testSpec().matches(*fakeTestCase("notIncluded")) == false for: false == false
@@ -1527,21 +1547,21 @@ CmdLine.tests.cpp:<line number>: passed: cfg.hasTestFilters() for: true
 CmdLine.tests.cpp:<line number>: passed: cfg.testSpec().matches(*fakeTestCase("test1")) == false for: false == false
 CmdLine.tests.cpp:<line number>: passed: cfg.testSpec().matches(*fakeTestCase("alwaysIncluded")) for: true
 CmdLine.tests.cpp:<line number>: passed: result for: {?} with 1 message: 'result.errorMessage() := ""'
-CmdLine.tests.cpp:<line number>: passed: config.reporterSpecifications == vec_Specs{ { "console", {}, {}, {} } } for: { {?} } == { {?} } with 1 message: 'result.errorMessage() := ""'
+CmdLine.tests.cpp:<line number>: passed: config.reporterSpecifications == vec_Specs{ { "console", {}, {}, {}, {} } } for: { {?} } == { {?} } with 1 message: 'result.errorMessage() := ""'
 CmdLine.tests.cpp:<line number>: passed: result for: {?} with 1 message: 'result.errorMessage() := ""'
-CmdLine.tests.cpp:<line number>: passed: config.reporterSpecifications == vec_Specs{ { "xml", {}, {}, {} } } for: { {?} } == { {?} } with 1 message: 'result.errorMessage() := ""'
+CmdLine.tests.cpp:<line number>: passed: config.reporterSpecifications == vec_Specs{ { "xml", {}, {}, {}, {} } } for: { {?} } == { {?} } with 1 message: 'result.errorMessage() := ""'
 CmdLine.tests.cpp:<line number>: passed: result for: {?} with 1 message: 'result.errorMessage() := ""'
-CmdLine.tests.cpp:<line number>: passed: config.reporterSpecifications == vec_Specs{ { "junit", {}, {}, {} } } for: { {?} } == { {?} } with 1 message: 'result.errorMessage() := ""'
+CmdLine.tests.cpp:<line number>: passed: config.reporterSpecifications == vec_Specs{ { "junit", {}, {}, {}, {} } } for: { {?} } == { {?} } with 1 message: 'result.errorMessage() := ""'
 CmdLine.tests.cpp:<line number>: passed: !result for: true
 CmdLine.tests.cpp:<line number>: passed: result.errorMessage(), ContainsSubstring("Unrecognized reporter") for: "Unrecognized reporter, 'unsupported'. Check available with --list-reporters" contains: "Unrecognized reporter"
 CmdLine.tests.cpp:<line number>: passed: result for: {?} with 1 message: 'result.errorMessage() := ""'
-CmdLine.tests.cpp:<line number>: passed: config.reporterSpecifications == vec_Specs{ { "console", "out.txt"s, {}, {} } } for: { {?} } == { {?} } with 1 message: 'result.errorMessage() := ""'
+CmdLine.tests.cpp:<line number>: passed: config.reporterSpecifications == vec_Specs{ { "console", "out.txt"s, {}, {}, {} } } for: { {?} } == { {?} } with 1 message: 'result.errorMessage() := ""'
 CmdLine.tests.cpp:<line number>: passed: result for: {?} with 1 message: 'result.errorMessage() := ""'
-CmdLine.tests.cpp:<line number>: passed: config.reporterSpecifications == vec_Specs{ { "console", "C:\\Temp\\out.txt"s, {}, {} } } for: { {?} } == { {?} } with 1 message: 'result.errorMessage() := ""'
+CmdLine.tests.cpp:<line number>: passed: config.reporterSpecifications == vec_Specs{ { "console", "C:\\Temp\\out.txt"s, {}, {}, {} } } for: { {?} } == { {?} } with 1 message: 'result.errorMessage() := ""'
 CmdLine.tests.cpp:<line number>: passed: cli.parse({ "test", "-r", "xml::out=output.xml", "-r", "junit::out=output-junit.xml" }) for: {?}
-CmdLine.tests.cpp:<line number>: passed: config.reporterSpecifications == vec_Specs{ { "xml", "output.xml"s, {}, {} }, { "junit", "output-junit.xml"s, {}, {} } } for: { {?}, {?} } == { {?}, {?} }
+CmdLine.tests.cpp:<line number>: passed: config.reporterSpecifications == vec_Specs{ { "xml", "output.xml"s, {}, {}, {} }, { "junit", "output-junit.xml"s, {}, {}, {} } } for: { {?}, {?} } == { {?}, {?} }
 CmdLine.tests.cpp:<line number>: passed: cli.parse({ "test", "-r", "xml::out=output.xml", "-r", "console" }) for: {?}
-CmdLine.tests.cpp:<line number>: passed: config.reporterSpecifications == vec_Specs{ { "xml", "output.xml"s, {}, {} }, { "console", {}, {}, {} } } for: { {?}, {?} } == { {?}, {?} }
+CmdLine.tests.cpp:<line number>: passed: config.reporterSpecifications == vec_Specs{ { "xml", "output.xml"s, {}, {}, {} }, { "console", {}, {}, {}, {} } } for: { {?}, {?} } == { {?}, {?} }
 CmdLine.tests.cpp:<line number>: passed: !result for: true
 CmdLine.tests.cpp:<line number>: passed: result.errorMessage(), ContainsSubstring("Only one reporter may have unspecified output file.") for: "Only one reporter may have unspecified output file." contains: "Only one reporter may have unspecified output file."
 CmdLine.tests.cpp:<line number>: passed: cli.parse({"test", "-b"}) for: {?}
@@ -1676,7 +1696,7 @@ Reporters.tests.cpp:<line number>: passed: listingString, ContainsSubstring( "fa
 " ( contains: "fake test name" and contains: "fakeTestTag" ) with 1 message: 'Tested reporter: console'
 Reporters.tests.cpp:<line number>: passed: !(factories.empty()) for: !false
 Reporters.tests.cpp:<line number>: passed: listingString, ContainsSubstring("fakeTag"s) for: "{
-  "version": 1,
+  "version": 2,
   "metadata": {
     "name": "",
     "rng-seed": 1234,
@@ -1693,7 +1713,7 @@ Reporters.tests.cpp:<line number>: passed: listingString, ContainsSubstring("fak
     ]" contains: "fakeTag" with 1 message: 'Tested reporter: JSON'
 Reporters.tests.cpp:<line number>: passed: !(factories.empty()) for: !false
 Reporters.tests.cpp:<line number>: passed: listingString, ContainsSubstring("fake reporter"s) for: "{
-  "version": 1,
+  "version": 2,
   "metadata": {
     "name": "",
     "rng-seed": 1234,
@@ -1708,7 +1728,7 @@ Reporters.tests.cpp:<line number>: passed: listingString, ContainsSubstring("fak
     ]" contains: "fake reporter" with 1 message: 'Tested reporter: JSON'
 Reporters.tests.cpp:<line number>: passed: !(factories.empty()) for: !false
 Reporters.tests.cpp:<line number>: passed: listingString, ContainsSubstring( "fake test name"s ) && ContainsSubstring( "fakeTestTag"s ) for: "{
-  "version": 1,
+  "version": 2,
   "metadata": {
     "name": "",
     "rng-seed": 1234,
@@ -1718,14 +1738,9 @@ Reporters.tests.cpp:<line number>: passed: listingString, ContainsSubstring( "fa
     "tests": [
       {
         "name": "fake test name",
-        "class-name": "",
         "tags": [
           "fakeTestTag"
-        ],
-        "source-location": {
-          "filename": "fake-file.cpp",
-          "line": 123456789
-        }
+        ]
       }
     ]" ( contains: "fake test name" and contains: "fakeTestTag" ) with 1 message: 'Tested reporter: JSON'
 Reporters.tests.cpp:<line number>: passed: !(factories.empty()) for: !false
@@ -1897,11 +1912,11 @@ ToStringGeneral.tests.cpp:<line number>: passed: Catch::Detail::stringify(arr) =
 Matchers.tests.cpp:<line number>: passed: testStringForMatching(), ContainsSubstring( "string" ) for: "this string contains 'abc' as a substring" contains: "string"
 Matchers.tests.cpp:<line number>: passed: testStringForMatching(), ContainsSubstring( "string", Catch::CaseSensitive::No ) for: "this string contains 'abc' as a substring" contains: "string" (case insensitive)
 Matchers.tests.cpp:<line number>: passed: testStringForMatching(), ContainsSubstring( "abc" ) for: "this string contains 'abc' as a substring" contains: "abc"
-Matchers.tests.cpp:<line number>: passed: testStringForMatching(), ContainsSubstring( "aBC", Catch::CaseSensitive::No ) for: "this string contains 'abc' as a substring" contains: "abc" (case insensitive)
+Matchers.tests.cpp:<line number>: passed: testStringForMatching(), ContainsSubstring( "aBC", Catch::CaseSensitive::No ) for: "this string contains 'abc' as a substring" contains: "aBC" (case insensitive)
 Matchers.tests.cpp:<line number>: passed: testStringForMatching(), StartsWith( "this" ) for: "this string contains 'abc' as a substring" starts with: "this"
-Matchers.tests.cpp:<line number>: passed: testStringForMatching(), StartsWith( "THIS", Catch::CaseSensitive::No ) for: "this string contains 'abc' as a substring" starts with: "this" (case insensitive)
+Matchers.tests.cpp:<line number>: passed: testStringForMatching(), StartsWith( "THIS", Catch::CaseSensitive::No ) for: "this string contains 'abc' as a substring" starts with: "THIS" (case insensitive)
 Matchers.tests.cpp:<line number>: passed: testStringForMatching(), EndsWith( "substring" ) for: "this string contains 'abc' as a substring" ends with: "substring"
-Matchers.tests.cpp:<line number>: passed: testStringForMatching(), EndsWith( " SuBsTrInG", Catch::CaseSensitive::No ) for: "this string contains 'abc' as a substring" ends with: " substring" (case insensitive)
+Matchers.tests.cpp:<line number>: passed: testStringForMatching(), EndsWith( " SuBsTrInG", Catch::CaseSensitive::No ) for: "this string contains 'abc' as a substring" ends with: " SuBsTrInG" (case insensitive)
 String.tests.cpp:<line number>: passed: empty.empty() for: true
 String.tests.cpp:<line number>: passed: empty.size() == 0 for: 0 == 0
 String.tests.cpp:<line number>: passed: std::strcmp( empty.data(), "" ) == 0 for: 0 == 0
@@ -3000,7 +3015,7 @@ InternalBenchmark.tests.cpp:<line number>: passed: med == 18. for: 18.0 == 18.0
 InternalBenchmark.tests.cpp:<line number>: passed: q3 == 23. for: 23.0 == 23.0
 Misc.tests.cpp:<line number>: passed:
 Misc.tests.cpp:<line number>: passed:
-test cases:  451 |  331 passed |  96 failed | 6 skipped | 18 failed as expected
-assertions: 2416 | 2215 passed | 158 failed | 43 failed as expected
+test cases:  454 |  334 passed |  96 failed | 6 skipped | 18 failed as expected
+assertions: 2423 | 2222 passed | 158 failed | 43 failed as expected
 
 

tests/SelfTest/Baselines/compact.sw.multi.approved.txt

@@ -629,7 +629,7 @@ Condition.tests.cpp:<line number>: passed: x == Approx( 1.3 ) for: 1.30000000000
 ==
 Approx( 1.30000000000000004 )
 Matchers.tests.cpp:<line number>: passed: testStringForMatching(), Equals( "this string contains 'abc' as a substring" ) for: "this string contains 'abc' as a substring" equals: "this string contains 'abc' as a substring"
-Matchers.tests.cpp:<line number>: passed: testStringForMatching(), Equals( "this string contains 'ABC' as a substring", Catch::CaseSensitive::No ) for: "this string contains 'abc' as a substring" equals: "this string contains 'abc' as a substring" (case insensitive)
+Matchers.tests.cpp:<line number>: passed: testStringForMatching(), Equals( "this string contains 'ABC' as a substring", Catch::CaseSensitive::No ) for: "this string contains 'abc' as a substring" equals: "this string contains 'ABC' as a substring" (case insensitive)
 Matchers.tests.cpp:<line number>: failed: testStringForMatching(), Equals( "this string contains 'ABC' as a substring" ) for: "this string contains 'abc' as a substring" equals: "this string contains 'ABC' as a substring"
 Matchers.tests.cpp:<line number>: failed: testStringForMatching(), Equals( "something else", Catch::CaseSensitive::No ) for: "this string contains 'abc' as a substring" equals: "something else" (case insensitive)
 ToStringGeneral.tests.cpp:<line number>: passed: ::Catch::Detail::stringify(WhatException{}) == "This exception has overridden what() method" for: "This exception has overridden what() method"
@@ -652,11 +652,11 @@ Matchers.tests.cpp:<line number>: passed: throwsDerivedException(), DerivedExcep
 Matchers.tests.cpp:<line number>: passed: throwsDerivedException(), DerivedException, MessageMatches( !StartsWith( "::what" ) ) for: DerivedException::what  matches "not starts with: "::what""
 Matchers.tests.cpp:<line number>: passed: throwsSpecialException( 2 ), SpecialException, MessageMatches( StartsWith( "Special" ) ) for: SpecialException::what  matches "starts with: "Special""
 Exception.tests.cpp:<line number>: passed: thisThrows(), "expected exception" for: "expected exception" equals: "expected exception"
-Exception.tests.cpp:<line number>: passed: thisThrows(), Equals( "expecteD Exception", Catch::CaseSensitive::No ) for: "expected exception" equals: "expected exception" (case insensitive)
+Exception.tests.cpp:<line number>: passed: thisThrows(), Equals( "expecteD Exception", Catch::CaseSensitive::No ) for: "expected exception" equals: "expecteD Exception" (case insensitive)
 Exception.tests.cpp:<line number>: passed: thisThrows(), StartsWith( "expected" ) for: "expected exception" starts with: "expected"
 Exception.tests.cpp:<line number>: passed: thisThrows(), EndsWith( "exception" ) for: "expected exception" ends with: "exception"
 Exception.tests.cpp:<line number>: passed: thisThrows(), ContainsSubstring( "except" ) for: "expected exception" contains: "except"
-Exception.tests.cpp:<line number>: passed: thisThrows(), ContainsSubstring( "exCept", Catch::CaseSensitive::No ) for: "expected exception" contains: "except" (case insensitive)
+Exception.tests.cpp:<line number>: passed: thisThrows(), ContainsSubstring( "exCept", Catch::CaseSensitive::No ) for: "expected exception" contains: "exCept" (case insensitive)
 ToString.tests.cpp:<line number>: passed: tos == tos for: { stringification failed with an exception: "Invalid" }
 ==
 { stringification failed with an exception: "Invalid" }
@@ -1246,6 +1246,26 @@ Json.tests.cpp:<line number>: passed: sstream.str() == "\"\\n\"" for: ""\n"" ==
 Json.tests.cpp:<line number>: passed: sstream.str() == "\"\\r\"" for: ""\r"" == ""\r""
 Json.tests.cpp:<line number>: passed: sstream.str() == "\"\\t\"" for: ""\t"" == ""\t""
 Json.tests.cpp:<line number>: passed: sstream.str() == "\"\\\\/\\t\\r\\n\"" for: ""\\/\t\r\n"" == ""\\/\t\r\n""
+Json.tests.cpp:<line number>: passed: sstream.str() == "NaN" for: "NaN" == "NaN"
+Json.tests.cpp:<line number>: passed: sstream.str() == "Infinity" for: "Infinity" == "Infinity"
+Json.tests.cpp:<line number>: passed: sstream.str() == "-Infinity" for: "-Infinity" == "-Infinity"
+Json.tests.cpp:<line number>: passed: sstream.str() == "NaN" for: "NaN" == "NaN"
+Json.tests.cpp:<line number>: passed: sstream.str() == "Infinity" for: "Infinity" == "Infinity"
+Json.tests.cpp:<line number>: passed: sstream.str() == "-Infinity" for: "-Infinity" == "-Infinity"
+Json.tests.cpp:<line number>: passed: sstream.str(), ContainsSubstring( "\"double\": 1.5," ) && ContainsSubstring( "\"int\": 1234567," ) && ContainsSubstring( "\"bool-1\": true," ) && ContainsSubstring( "\"bool-2\": false," ) && ContainsSubstring( "\"array\": [\n    2.5,\n    1234567\n  ]\n}" ) for: "{
+  "double": 1.5,
+  "int": 1234567,
+  "bool-1": true,
+  "bool-2": false,
+  "array": [
+    2.5,
+    1234567
+  ]
+}" ( contains: ""double": 1.5," and contains: ""int": 1234567," and contains: ""bool-1": true," and contains: ""bool-2": false," and contains: ""array": [
+    2.5,
+    1234567
+  ]
+}" )
 Compilation.tests.cpp:<line number>: passed: []() { return true; }() for: true
 Approx.tests.cpp:<line number>: passed: d <= Approx( 1.24 ) for: 1.22999999999999998
 <=
@@ -1509,9 +1529,9 @@ CmdLine.tests.cpp:<line number>: passed: config.noThrow == false for: false == f
 CmdLine.tests.cpp:<line number>: passed: config.reporterSpecifications.empty() for: true
 CmdLine.tests.cpp:<line number>: passed: !(cfg.hasTestFilters()) for: !false
 CmdLine.tests.cpp:<line number>: passed: cfg.getReporterSpecs().size() == 1 for: 1 == 1
-CmdLine.tests.cpp:<line number>: passed: cfg.getReporterSpecs()[0] == Catch::ReporterSpec{ expectedReporter, {}, {}, {} } for: {?} == {?}
+CmdLine.tests.cpp:<line number>: passed: cfg.getReporterSpecs()[0] == Catch::ReporterSpec{ expectedReporter, {}, {}, {}, {} } for: {?} == {?}
 CmdLine.tests.cpp:<line number>: passed: cfg.getProcessedReporterSpecs().size() == 1 for: 1 == 1
-CmdLine.tests.cpp:<line number>: passed: cfg.getProcessedReporterSpecs()[0] == Catch::ProcessedReporterSpec{ expectedReporter, std::string{}, Catch::ColourMode::PlatformDefault, {} } for: {?} == {?}
+CmdLine.tests.cpp:<line number>: passed: cfg.getProcessedReporterSpecs()[0] == Catch::ProcessedReporterSpec{ expectedReporter, std::string{}, Catch::ColourMode::PlatformDefault, Catch::Verbosity::Normal, {} } for: {?} == {?}
 CmdLine.tests.cpp:<line number>: passed: result for: {?}
 CmdLine.tests.cpp:<line number>: passed: cfg.hasTestFilters() for: true
 CmdLine.tests.cpp:<line number>: passed: cfg.testSpec().matches(*fakeTestCase("notIncluded")) == false for: false == false
@@ -1525,21 +1545,21 @@ CmdLine.tests.cpp:<line number>: passed: cfg.hasTestFilters() for: true
 CmdLine.tests.cpp:<line number>: passed: cfg.testSpec().matches(*fakeTestCase("test1")) == false for: false == false
 CmdLine.tests.cpp:<line number>: passed: cfg.testSpec().matches(*fakeTestCase("alwaysIncluded")) for: true
 CmdLine.tests.cpp:<line number>: passed: result for: {?} with 1 message: 'result.errorMessage() := ""'
-CmdLine.tests.cpp:<line number>: passed: config.reporterSpecifications == vec_Specs{ { "console", {}, {}, {} } } for: { {?} } == { {?} } with 1 message: 'result.errorMessage() := ""'
+CmdLine.tests.cpp:<line number>: passed: config.reporterSpecifications == vec_Specs{ { "console", {}, {}, {}, {} } } for: { {?} } == { {?} } with 1 message: 'result.errorMessage() := ""'
 CmdLine.tests.cpp:<line number>: passed: result for: {?} with 1 message: 'result.errorMessage() := ""'
-CmdLine.tests.cpp:<line number>: passed: config.reporterSpecifications == vec_Specs{ { "xml", {}, {}, {} } } for: { {?} } == { {?} } with 1 message: 'result.errorMessage() := ""'
+CmdLine.tests.cpp:<line number>: passed: config.reporterSpecifications == vec_Specs{ { "xml", {}, {}, {}, {} } } for: { {?} } == { {?} } with 1 message: 'result.errorMessage() := ""'
 CmdLine.tests.cpp:<line number>: passed: result for: {?} with 1 message: 'result.errorMessage() := ""'
-CmdLine.tests.cpp:<line number>: passed: config.reporterSpecifications == vec_Specs{ { "junit", {}, {}, {} } } for: { {?} } == { {?} } with 1 message: 'result.errorMessage() := ""'
+CmdLine.tests.cpp:<line number>: passed: config.reporterSpecifications == vec_Specs{ { "junit", {}, {}, {}, {} } } for: { {?} } == { {?} } with 1 message: 'result.errorMessage() := ""'
 CmdLine.tests.cpp:<line number>: passed: !result for: true
 CmdLine.tests.cpp:<line number>: passed: result.errorMessage(), ContainsSubstring("Unrecognized reporter") for: "Unrecognized reporter, 'unsupported'. Check available with --list-reporters" contains: "Unrecognized reporter"
 CmdLine.tests.cpp:<line number>: passed: result for: {?} with 1 message: 'result.errorMessage() := ""'
-CmdLine.tests.cpp:<line number>: passed: config.reporterSpecifications == vec_Specs{ { "console", "out.txt"s, {}, {} } } for: { {?} } == { {?} } with 1 message: 'result.errorMessage() := ""'
+CmdLine.tests.cpp:<line number>: passed: config.reporterSpecifications == vec_Specs{ { "console", "out.txt"s, {}, {}, {} } } for: { {?} } == { {?} } with 1 message: 'result.errorMessage() := ""'
 CmdLine.tests.cpp:<line number>: passed: result for: {?} with 1 message: 'result.errorMessage() := ""'
-CmdLine.tests.cpp:<line number>: passed: config.reporterSpecifications == vec_Specs{ { "console", "C:\\Temp\\out.txt"s, {}, {} } } for: { {?} } == { {?} } with 1 message: 'result.errorMessage() := ""'
+CmdLine.tests.cpp:<line number>: passed: config.reporterSpecifications == vec_Specs{ { "console", "C:\\Temp\\out.txt"s, {}, {}, {} } } for: { {?} } == { {?} } with 1 message: 'result.errorMessage() := ""'
 CmdLine.tests.cpp:<line number>: passed: cli.parse({ "test", "-r", "xml::out=output.xml", "-r", "junit::out=output-junit.xml" }) for: {?}
-CmdLine.tests.cpp:<line number>: passed: config.reporterSpecifications == vec_Specs{ { "xml", "output.xml"s, {}, {} }, { "junit", "output-junit.xml"s, {}, {} } } for: { {?}, {?} } == { {?}, {?} }
+CmdLine.tests.cpp:<line number>: passed: config.reporterSpecifications == vec_Specs{ { "xml", "output.xml"s, {}, {}, {} }, { "junit", "output-junit.xml"s, {}, {}, {} } } for: { {?}, {?} } == { {?}, {?} }
 CmdLine.tests.cpp:<line number>: passed: cli.parse({ "test", "-r", "xml::out=output.xml", "-r", "console" }) for: {?}
-CmdLine.tests.cpp:<line number>: passed: config.reporterSpecifications == vec_Specs{ { "xml", "output.xml"s, {}, {} }, { "console", {}, {}, {} } } for: { {?}, {?} } == { {?}, {?} }
+CmdLine.tests.cpp:<line number>: passed: config.reporterSpecifications == vec_Specs{ { "xml", "output.xml"s, {}, {}, {} }, { "console", {}, {}, {}, {} } } for: { {?}, {?} } == { {?}, {?} }
 CmdLine.tests.cpp:<line number>: passed: !result for: true
 CmdLine.tests.cpp:<line number>: passed: result.errorMessage(), ContainsSubstring("Only one reporter may have unspecified output file.") for: "Only one reporter may have unspecified output file." contains: "Only one reporter may have unspecified output file."
 CmdLine.tests.cpp:<line number>: passed: cli.parse({"test", "-b"}) for: {?}
@@ -1674,7 +1694,7 @@ Reporters.tests.cpp:<line number>: passed: listingString, ContainsSubstring( "fa
 " ( contains: "fake test name" and contains: "fakeTestTag" ) with 1 message: 'Tested reporter: console'
 Reporters.tests.cpp:<line number>: passed: !(factories.empty()) for: !false
 Reporters.tests.cpp:<line number>: passed: listingString, ContainsSubstring("fakeTag"s) for: "{
-  "version": 1,
+  "version": 2,
   "metadata": {
     "name": "",
     "rng-seed": 1234,
@@ -1691,7 +1711,7 @@ Reporters.tests.cpp:<line number>: passed: listingString, ContainsSubstring("fak
     ]" contains: "fakeTag" with 1 message: 'Tested reporter: JSON'
 Reporters.tests.cpp:<line number>: passed: !(factories.empty()) for: !false
 Reporters.tests.cpp:<line number>: passed: listingString, ContainsSubstring("fake reporter"s) for: "{
-  "version": 1,
+  "version": 2,
   "metadata": {
     "name": "",
     "rng-seed": 1234,
@@ -1706,7 +1726,7 @@ Reporters.tests.cpp:<line number>: passed: listingString, ContainsSubstring("fak
     ]" contains: "fake reporter" with 1 message: 'Tested reporter: JSON'
 Reporters.tests.cpp:<line number>: passed: !(factories.empty()) for: !false
 Reporters.tests.cpp:<line number>: passed: listingString, ContainsSubstring( "fake test name"s ) && ContainsSubstring( "fakeTestTag"s ) for: "{
-  "version": 1,
+  "version": 2,
   "metadata": {
     "name": "",
     "rng-seed": 1234,
@@ -1716,14 +1736,9 @@ Reporters.tests.cpp:<line number>: passed: listingString, ContainsSubstring( "fa
     "tests": [
       {
         "name": "fake test name",
-        "class-name": "",
         "tags": [
           "fakeTestTag"
-        ],
-        "source-location": {
-          "filename": "fake-file.cpp",
-          "line": 123456789
-        }
+        ]
       }
     ]" ( contains: "fake test name" and contains: "fakeTestTag" ) with 1 message: 'Tested reporter: JSON'
 Reporters.tests.cpp:<line number>: passed: !(factories.empty()) for: !false
@@ -1890,11 +1905,11 @@ ToStringGeneral.tests.cpp:<line number>: passed: Catch::Detail::stringify(arr) =
 Matchers.tests.cpp:<line number>: passed: testStringForMatching(), ContainsSubstring( "string" ) for: "this string contains 'abc' as a substring" contains: "string"
 Matchers.tests.cpp:<line number>: passed: testStringForMatching(), ContainsSubstring( "string", Catch::CaseSensitive::No ) for: "this string contains 'abc' as a substring" contains: "string" (case insensitive)
 Matchers.tests.cpp:<line number>: passed: testStringForMatching(), ContainsSubstring( "abc" ) for: "this string contains 'abc' as a substring" contains: "abc"
-Matchers.tests.cpp:<line number>: passed: testStringForMatching(), ContainsSubstring( "aBC", Catch::CaseSensitive::No ) for: "this string contains 'abc' as a substring" contains: "abc" (case insensitive)
+Matchers.tests.cpp:<line number>: passed: testStringForMatching(), ContainsSubstring( "aBC", Catch::CaseSensitive::No ) for: "this string contains 'abc' as a substring" contains: "aBC" (case insensitive)
 Matchers.tests.cpp:<line number>: passed: testStringForMatching(), StartsWith( "this" ) for: "this string contains 'abc' as a substring" starts with: "this"
-Matchers.tests.cpp:<line number>: passed: testStringForMatching(), StartsWith( "THIS", Catch::CaseSensitive::No ) for: "this string contains 'abc' as a substring" starts with: "this" (case insensitive)
+Matchers.tests.cpp:<line number>: passed: testStringForMatching(), StartsWith( "THIS", Catch::CaseSensitive::No ) for: "this string contains 'abc' as a substring" starts with: "THIS" (case insensitive)
 Matchers.tests.cpp:<line number>: passed: testStringForMatching(), EndsWith( "substring" ) for: "this string contains 'abc' as a substring" ends with: "substring"
-Matchers.tests.cpp:<line number>: passed: testStringForMatching(), EndsWith( " SuBsTrInG", Catch::CaseSensitive::No ) for: "this string contains 'abc' as a substring" ends with: " substring" (case insensitive)
+Matchers.tests.cpp:<line number>: passed: testStringForMatching(), EndsWith( " SuBsTrInG", Catch::CaseSensitive::No ) for: "this string contains 'abc' as a substring" ends with: " SuBsTrInG" (case insensitive)
 String.tests.cpp:<line number>: passed: empty.empty() for: true
 String.tests.cpp:<line number>: passed: empty.size() == 0 for: 0 == 0
 String.tests.cpp:<line number>: passed: std::strcmp( empty.data(), "" ) == 0 for: 0 == 0
@@ -2989,7 +3004,7 @@ InternalBenchmark.tests.cpp:<line number>: passed: med == 18. for: 18.0 == 18.0
 InternalBenchmark.tests.cpp:<line number>: passed: q3 == 23. for: 23.0 == 23.0
 Misc.tests.cpp:<line number>: passed:
 Misc.tests.cpp:<line number>: passed:
-test cases:  451 |  331 passed |  96 failed | 6 skipped | 18 failed as expected
-assertions: 2416 | 2215 passed | 158 failed | 43 failed as expected
+test cases:  454 |  334 passed |  96 failed | 6 skipped | 18 failed as expected
+assertions: 2423 | 2222 passed | 158 failed | 43 failed as expected
 
 

tests/SelfTest/Baselines/console.std.approved.txt

@@ -1743,6 +1743,6 @@ due to unexpected exception with message:
   Why would you throw a std::string?
 
 ===============================================================================
-test cases:  451 |  349 passed |  76 failed | 7 skipped | 19 failed as expected
-assertions: 2394 | 2215 passed | 136 failed | 43 failed as expected
+test cases:  454 |  352 passed |  76 failed | 7 skipped | 19 failed as expected
+assertions: 2401 | 2222 passed | 136 failed | 43 failed as expected
 

tests/SelfTest/Baselines/console.sw.approved.txt

@@ -4521,7 +4521,7 @@ Matchers.tests.cpp:<line number>: PASSED:
   CHECK_THAT( testStringForMatching(), Equals( "this string contains 'ABC' as a substring", Catch::CaseSensitive::No ) )
 with expansion:
   "this string contains 'abc' as a substring" equals: "this string contains
-  'abc' as a substring" (case insensitive)
+  'ABC' as a substring" (case insensitive)
 
 -------------------------------------------------------------------------------
 Equals string matcher
@@ -4679,7 +4679,7 @@ Exception.tests.cpp:<line number>
 Exception.tests.cpp:<line number>: PASSED:
   REQUIRE_THROWS_WITH( thisThrows(), Equals( "expecteD Exception", Catch::CaseSensitive::No ) )
 with expansion:
-  "expected exception" equals: "expected exception" (case insensitive)
+  "expected exception" equals: "expecteD Exception" (case insensitive)
 
 -------------------------------------------------------------------------------
 Exception messages can be tested for
@@ -4706,7 +4706,7 @@ with expansion:
 Exception.tests.cpp:<line number>: PASSED:
   REQUIRE_THROWS_WITH( thisThrows(), ContainsSubstring( "exCept", Catch::CaseSensitive::No ) )
 with expansion:
-  "expected exception" contains: "except" (case insensitive)
+  "expected exception" contains: "exCept" (case insensitive)
 
 -------------------------------------------------------------------------------
 Exception thrown inside stringify does not fail the test
@@ -8219,6 +8219,103 @@ Json.tests.cpp:<line number>: PASSED:
 with expansion:
   ""\\/\t\r\n"" == ""\\/\t\r\n""
 
+-------------------------------------------------------------------------------
+JsonWriter serializes non-finite FP using Python spelling - double
+  NaN
+-------------------------------------------------------------------------------
+Json.tests.cpp:<line number>
+...............................................................................
+
+Json.tests.cpp:<line number>: PASSED:
+  REQUIRE( sstream.str() == "NaN" )
+with expansion:
+  "NaN" == "NaN"
+
+-------------------------------------------------------------------------------
+JsonWriter serializes non-finite FP using Python spelling - double
+  Pos nf
+-------------------------------------------------------------------------------
+Json.tests.cpp:<line number>
+...............................................................................
+
+Json.tests.cpp:<line number>: PASSED:
+  REQUIRE( sstream.str() == "Infinity" )
+with expansion:
+  "Infinity" == "Infinity"
+
+-------------------------------------------------------------------------------
+JsonWriter serializes non-finite FP using Python spelling - double
+  Neg inf
+-------------------------------------------------------------------------------
+Json.tests.cpp:<line number>
+...............................................................................
+
+Json.tests.cpp:<line number>: PASSED:
+  REQUIRE( sstream.str() == "-Infinity" )
+with expansion:
+  "-Infinity" == "-Infinity"
+
+-------------------------------------------------------------------------------
+JsonWriter serializes non-finite FP using Python spelling - float
+  NaN
+-------------------------------------------------------------------------------
+Json.tests.cpp:<line number>
+...............................................................................
+
+Json.tests.cpp:<line number>: PASSED:
+  REQUIRE( sstream.str() == "NaN" )
+with expansion:
+  "NaN" == "NaN"
+
+-------------------------------------------------------------------------------
+JsonWriter serializes non-finite FP using Python spelling - float
+  Pos nf
+-------------------------------------------------------------------------------
+Json.tests.cpp:<line number>
+...............................................................................
+
+Json.tests.cpp:<line number>: PASSED:
+  REQUIRE( sstream.str() == "Infinity" )
+with expansion:
+  "Infinity" == "Infinity"
+
+-------------------------------------------------------------------------------
+JsonWriter serializes non-finite FP using Python spelling - float
+  Neg inf
+-------------------------------------------------------------------------------
+Json.tests.cpp:<line number>
+...............................................................................
+
+Json.tests.cpp:<line number>: PASSED:
+  REQUIRE( sstream.str() == "-Infinity" )
+with expansion:
+  "-Infinity" == "-Infinity"
+
+-------------------------------------------------------------------------------
+JsonWriter serializes numbers independently of the global locale
+-------------------------------------------------------------------------------
+Json.tests.cpp:<line number>
+...............................................................................
+
+Json.tests.cpp:<line number>: PASSED:
+  REQUIRE_THAT( sstream.str(), ContainsSubstring( "\"double\": 1.5," ) && ContainsSubstring( "\"int\": 1234567," ) && ContainsSubstring( "\"bool-1\": true," ) && ContainsSubstring( "\"bool-2\": false," ) && ContainsSubstring( "\"array\": [\n    2.5,\n    1234567\n  ]\n}" ) )
+with expansion:
+  "{
+    "double": 1.5,
+    "int": 1234567,
+    "bool-1": true,
+    "bool-2": false,
+    "array": [
+      2.5,
+      1234567
+    ]
+  }" ( contains: ""double": 1.5," and contains: ""int": 1234567," and contains:
+  ""bool-1": true," and contains: ""bool-2": false," and contains: ""array": [
+      2.5,
+      1234567
+    ]
+  }" )
+
 -------------------------------------------------------------------------------
 Lambdas in assertions
 -------------------------------------------------------------------------------
@@ -9880,7 +9977,7 @@ with expansion:
   1 == 1
 
 CmdLine.tests.cpp:<line number>: PASSED:
-  CHECK( cfg.getReporterSpecs()[0] == Catch::ReporterSpec{ expectedReporter, {}, {}, {} } )
+  CHECK( cfg.getReporterSpecs()[0] == Catch::ReporterSpec{ expectedReporter, {}, {}, {}, {} } )
 with expansion:
   {?} == {?}
 
@@ -9890,7 +9987,7 @@ with expansion:
   1 == 1
 
 CmdLine.tests.cpp:<line number>: PASSED:
-  CHECK( cfg.getProcessedReporterSpecs()[0] == Catch::ProcessedReporterSpec{ expectedReporter, std::string{}, Catch::ColourMode::PlatformDefault, {} } )
+  CHECK( cfg.getProcessedReporterSpecs()[0] == Catch::ProcessedReporterSpec{ expectedReporter, std::string{}, Catch::ColourMode::PlatformDefault, Catch::Verbosity::Normal, {} } )
 with expansion:
   {?} == {?}
 
@@ -9994,7 +10091,7 @@ with message:
   result.errorMessage() := ""
 
 CmdLine.tests.cpp:<line number>: PASSED:
-  REQUIRE( config.reporterSpecifications == vec_Specs{ { "console", {}, {}, {} } } )
+  REQUIRE( config.reporterSpecifications == vec_Specs{ { "console", {}, {}, {}, {} } } )
 with expansion:
   { {?} } == { {?} }
 with message:
@@ -10016,7 +10113,7 @@ with message:
   result.errorMessage() := ""
 
 CmdLine.tests.cpp:<line number>: PASSED:
-  REQUIRE( config.reporterSpecifications == vec_Specs{ { "xml", {}, {}, {} } } )
+  REQUIRE( config.reporterSpecifications == vec_Specs{ { "xml", {}, {}, {}, {} } } )
 with expansion:
   { {?} } == { {?} }
 with message:
@@ -10038,7 +10135,7 @@ with message:
   result.errorMessage() := ""
 
 CmdLine.tests.cpp:<line number>: PASSED:
-  REQUIRE( config.reporterSpecifications == vec_Specs{ { "junit", {}, {}, {} } } )
+  REQUIRE( config.reporterSpecifications == vec_Specs{ { "junit", {}, {}, {}, {} } } )
 with expansion:
   { {?} } == { {?} }
 with message:
@@ -10079,7 +10176,7 @@ with message:
   result.errorMessage() := ""
 
 CmdLine.tests.cpp:<line number>: PASSED:
-  REQUIRE( config.reporterSpecifications == vec_Specs{ { "console", "out.txt"s, {}, {} } } )
+  REQUIRE( config.reporterSpecifications == vec_Specs{ { "console", "out.txt"s, {}, {}, {} } } )
 with expansion:
   { {?} } == { {?} }
 with message:
@@ -10101,7 +10198,7 @@ with message:
   result.errorMessage() := ""
 
 CmdLine.tests.cpp:<line number>: PASSED:
-  REQUIRE( config.reporterSpecifications == vec_Specs{ { "console", "C:\\Temp\\out.txt"s, {}, {} } } )
+  REQUIRE( config.reporterSpecifications == vec_Specs{ { "console", "C:\\Temp\\out.txt"s, {}, {}, {} } } )
 with expansion:
   { {?} } == { {?} }
 with message:
@@ -10122,7 +10219,7 @@ with expansion:
   {?}
 
 CmdLine.tests.cpp:<line number>: PASSED:
-  REQUIRE( config.reporterSpecifications == vec_Specs{ { "xml", "output.xml"s, {}, {} }, { "junit", "output-junit.xml"s, {}, {} } } )
+  REQUIRE( config.reporterSpecifications == vec_Specs{ { "xml", "output.xml"s, {}, {}, {} }, { "junit", "output-junit.xml"s, {}, {}, {} } } )
 with expansion:
   { {?}, {?} } == { {?}, {?} }
 
@@ -10141,7 +10238,7 @@ with expansion:
   {?}
 
 CmdLine.tests.cpp:<line number>: PASSED:
-  REQUIRE( config.reporterSpecifications == vec_Specs{ { "xml", "output.xml"s, {}, {} }, { "console", {}, {}, {} } } )
+  REQUIRE( config.reporterSpecifications == vec_Specs{ { "xml", "output.xml"s, {}, {}, {} }, { "console", {}, {}, {}, {} } } )
 with expansion:
   { {?}, {?} } == { {?}, {?} }
 
@@ -11136,7 +11233,7 @@ Reporters.tests.cpp:<line number>: PASSED:
   REQUIRE_THAT( listingString, ContainsSubstring("fakeTag"s) )
 with expansion:
   "{
-    "version": 1,
+    "version": 2,
     "metadata": {
       "name": "",
       "rng-seed": 1234,
@@ -11176,7 +11273,7 @@ Reporters.tests.cpp:<line number>: PASSED:
   REQUIRE_THAT( listingString, ContainsSubstring("fake reporter"s) )
 with expansion:
   "{
-    "version": 1,
+    "version": 2,
     "metadata": {
       "name": "",
       "rng-seed": 1234,
@@ -11214,7 +11311,7 @@ Reporters.tests.cpp:<line number>: PASSED:
   REQUIRE_THAT( listingString, ContainsSubstring( "fake test name"s ) && ContainsSubstring( "fakeTestTag"s ) )
 with expansion:
   "{
-    "version": 1,
+    "version": 2,
     "metadata": {
       "name": "",
       "rng-seed": 1234,
@@ -11224,14 +11321,9 @@ with expansion:
       "tests": [
         {
           "name": "fake test name",
-          "class-name": "",
           "tags": [
             "fakeTestTag"
-          ],
-          "source-location": {
-            "filename": "fake-file.cpp",
-            "line": 123456789
-          }
+          ]
         }
       ]" ( contains: "fake test name" and contains: "fakeTestTag" )
 with message:
@@ -12103,7 +12195,7 @@ with expansion:
 Matchers.tests.cpp:<line number>: PASSED:
   CHECK_THAT( testStringForMatching(), ContainsSubstring( "aBC", Catch::CaseSensitive::No ) )
 with expansion:
-  "this string contains 'abc' as a substring" contains: "abc" (case
+  "this string contains 'abc' as a substring" contains: "aBC" (case
   insensitive)
 
 Matchers.tests.cpp:<line number>: PASSED:
@@ -12114,7 +12206,7 @@ with expansion:
 Matchers.tests.cpp:<line number>: PASSED:
   CHECK_THAT( testStringForMatching(), StartsWith( "THIS", Catch::CaseSensitive::No ) )
 with expansion:
-  "this string contains 'abc' as a substring" starts with: "this" (case
+  "this string contains 'abc' as a substring" starts with: "THIS" (case
   insensitive)
 
 Matchers.tests.cpp:<line number>: PASSED:
@@ -12125,7 +12217,7 @@ with expansion:
 Matchers.tests.cpp:<line number>: PASSED:
   CHECK_THAT( testStringForMatching(), EndsWith( " SuBsTrInG", Catch::CaseSensitive::No ) )
 with expansion:
-  "this string contains 'abc' as a substring" ends with: " substring" (case
+  "this string contains 'abc' as a substring" ends with: " SuBsTrInG" (case
   insensitive)
 
 -------------------------------------------------------------------------------
@@ -20134,6 +20226,6 @@ Misc.tests.cpp:<line number>
 Misc.tests.cpp:<line number>: PASSED:
 
 ===============================================================================
-test cases:  451 |  331 passed |  96 failed | 6 skipped | 18 failed as expected
-assertions: 2416 | 2215 passed | 158 failed | 43 failed as expected
+test cases:  454 |  334 passed |  96 failed | 6 skipped | 18 failed as expected
+assertions: 2423 | 2222 passed | 158 failed | 43 failed as expected
 

tests/SelfTest/Baselines/console.sw.multi.approved.txt

@@ -4519,7 +4519,7 @@ Matchers.tests.cpp:<line number>: PASSED:
   CHECK_THAT( testStringForMatching(), Equals( "this string contains 'ABC' as a substring", Catch::CaseSensitive::No ) )
 with expansion:
   "this string contains 'abc' as a substring" equals: "this string contains
-  'abc' as a substring" (case insensitive)
+  'ABC' as a substring" (case insensitive)
 
 -------------------------------------------------------------------------------
 Equals string matcher
@@ -4677,7 +4677,7 @@ Exception.tests.cpp:<line number>
 Exception.tests.cpp:<line number>: PASSED:
   REQUIRE_THROWS_WITH( thisThrows(), Equals( "expecteD Exception", Catch::CaseSensitive::No ) )
 with expansion:
-  "expected exception" equals: "expected exception" (case insensitive)
+  "expected exception" equals: "expecteD Exception" (case insensitive)
 
 -------------------------------------------------------------------------------
 Exception messages can be tested for
@@ -4704,7 +4704,7 @@ with expansion:
 Exception.tests.cpp:<line number>: PASSED:
   REQUIRE_THROWS_WITH( thisThrows(), ContainsSubstring( "exCept", Catch::CaseSensitive::No ) )
 with expansion:
-  "expected exception" contains: "except" (case insensitive)
+  "expected exception" contains: "exCept" (case insensitive)
 
 -------------------------------------------------------------------------------
 Exception thrown inside stringify does not fail the test
@@ -8217,6 +8217,103 @@ Json.tests.cpp:<line number>: PASSED:
 with expansion:
   ""\\/\t\r\n"" == ""\\/\t\r\n""
 
+-------------------------------------------------------------------------------
+JsonWriter serializes non-finite FP using Python spelling - double
+  NaN
+-------------------------------------------------------------------------------
+Json.tests.cpp:<line number>
+...............................................................................
+
+Json.tests.cpp:<line number>: PASSED:
+  REQUIRE( sstream.str() == "NaN" )
+with expansion:
+  "NaN" == "NaN"
+
+-------------------------------------------------------------------------------
+JsonWriter serializes non-finite FP using Python spelling - double
+  Pos nf
+-------------------------------------------------------------------------------
+Json.tests.cpp:<line number>
+...............................................................................
+
+Json.tests.cpp:<line number>: PASSED:
+  REQUIRE( sstream.str() == "Infinity" )
+with expansion:
+  "Infinity" == "Infinity"
+
+-------------------------------------------------------------------------------
+JsonWriter serializes non-finite FP using Python spelling - double
+  Neg inf
+-------------------------------------------------------------------------------
+Json.tests.cpp:<line number>
+...............................................................................
+
+Json.tests.cpp:<line number>: PASSED:
+  REQUIRE( sstream.str() == "-Infinity" )
+with expansion:
+  "-Infinity" == "-Infinity"
+
+-------------------------------------------------------------------------------
+JsonWriter serializes non-finite FP using Python spelling - float
+  NaN
+-------------------------------------------------------------------------------
+Json.tests.cpp:<line number>
+...............................................................................
+
+Json.tests.cpp:<line number>: PASSED:
+  REQUIRE( sstream.str() == "NaN" )
+with expansion:
+  "NaN" == "NaN"
+
+-------------------------------------------------------------------------------
+JsonWriter serializes non-finite FP using Python spelling - float
+  Pos nf
+-------------------------------------------------------------------------------
+Json.tests.cpp:<line number>
+...............................................................................
+
+Json.tests.cpp:<line number>: PASSED:
+  REQUIRE( sstream.str() == "Infinity" )
+with expansion:
+  "Infinity" == "Infinity"
+
+-------------------------------------------------------------------------------
+JsonWriter serializes non-finite FP using Python spelling - float
+  Neg inf
+-------------------------------------------------------------------------------
+Json.tests.cpp:<line number>
+...............................................................................
+
+Json.tests.cpp:<line number>: PASSED:
+  REQUIRE( sstream.str() == "-Infinity" )
+with expansion:
+  "-Infinity" == "-Infinity"
+
+-------------------------------------------------------------------------------
+JsonWriter serializes numbers independently of the global locale
+-------------------------------------------------------------------------------
+Json.tests.cpp:<line number>
+...............................................................................
+
+Json.tests.cpp:<line number>: PASSED:
+  REQUIRE_THAT( sstream.str(), ContainsSubstring( "\"double\": 1.5," ) && ContainsSubstring( "\"int\": 1234567," ) && ContainsSubstring( "\"bool-1\": true," ) && ContainsSubstring( "\"bool-2\": false," ) && ContainsSubstring( "\"array\": [\n    2.5,\n    1234567\n  ]\n}" ) )
+with expansion:
+  "{
+    "double": 1.5,
+    "int": 1234567,
+    "bool-1": true,
+    "bool-2": false,
+    "array": [
+      2.5,
+      1234567
+    ]
+  }" ( contains: ""double": 1.5," and contains: ""int": 1234567," and contains:
+  ""bool-1": true," and contains: ""bool-2": false," and contains: ""array": [
+      2.5,
+      1234567
+    ]
+  }" )
+
 -------------------------------------------------------------------------------
 Lambdas in assertions
 -------------------------------------------------------------------------------
@@ -9878,7 +9975,7 @@ with expansion:
   1 == 1
 
 CmdLine.tests.cpp:<line number>: PASSED:
-  CHECK( cfg.getReporterSpecs()[0] == Catch::ReporterSpec{ expectedReporter, {}, {}, {} } )
+  CHECK( cfg.getReporterSpecs()[0] == Catch::ReporterSpec{ expectedReporter, {}, {}, {}, {} } )
 with expansion:
   {?} == {?}
 
@@ -9888,7 +9985,7 @@ with expansion:
   1 == 1
 
 CmdLine.tests.cpp:<line number>: PASSED:
-  CHECK( cfg.getProcessedReporterSpecs()[0] == Catch::ProcessedReporterSpec{ expectedReporter, std::string{}, Catch::ColourMode::PlatformDefault, {} } )
+  CHECK( cfg.getProcessedReporterSpecs()[0] == Catch::ProcessedReporterSpec{ expectedReporter, std::string{}, Catch::ColourMode::PlatformDefault, Catch::Verbosity::Normal, {} } )
 with expansion:
   {?} == {?}
 
@@ -9992,7 +10089,7 @@ with message:
   result.errorMessage() := ""
 
 CmdLine.tests.cpp:<line number>: PASSED:
-  REQUIRE( config.reporterSpecifications == vec_Specs{ { "console", {}, {}, {} } } )
+  REQUIRE( config.reporterSpecifications == vec_Specs{ { "console", {}, {}, {}, {} } } )
 with expansion:
   { {?} } == { {?} }
 with message:
@@ -10014,7 +10111,7 @@ with message:
   result.errorMessage() := ""
 
 CmdLine.tests.cpp:<line number>: PASSED:
-  REQUIRE( config.reporterSpecifications == vec_Specs{ { "xml", {}, {}, {} } } )
+  REQUIRE( config.reporterSpecifications == vec_Specs{ { "xml", {}, {}, {}, {} } } )
 with expansion:
   { {?} } == { {?} }
 with message:
@@ -10036,7 +10133,7 @@ with message:
   result.errorMessage() := ""
 
 CmdLine.tests.cpp:<line number>: PASSED:
-  REQUIRE( config.reporterSpecifications == vec_Specs{ { "junit", {}, {}, {} } } )
+  REQUIRE( config.reporterSpecifications == vec_Specs{ { "junit", {}, {}, {}, {} } } )
 with expansion:
   { {?} } == { {?} }
 with message:
@@ -10077,7 +10174,7 @@ with message:
   result.errorMessage() := ""
 
 CmdLine.tests.cpp:<line number>: PASSED:
-  REQUIRE( config.reporterSpecifications == vec_Specs{ { "console", "out.txt"s, {}, {} } } )
+  REQUIRE( config.reporterSpecifications == vec_Specs{ { "console", "out.txt"s, {}, {}, {} } } )
 with expansion:
   { {?} } == { {?} }
 with message:
@@ -10099,7 +10196,7 @@ with message:
   result.errorMessage() := ""
 
 CmdLine.tests.cpp:<line number>: PASSED:
-  REQUIRE( config.reporterSpecifications == vec_Specs{ { "console", "C:\\Temp\\out.txt"s, {}, {} } } )
+  REQUIRE( config.reporterSpecifications == vec_Specs{ { "console", "C:\\Temp\\out.txt"s, {}, {}, {} } } )
 with expansion:
   { {?} } == { {?} }
 with message:
@@ -10120,7 +10217,7 @@ with expansion:
   {?}
 
 CmdLine.tests.cpp:<line number>: PASSED:
-  REQUIRE( config.reporterSpecifications == vec_Specs{ { "xml", "output.xml"s, {}, {} }, { "junit", "output-junit.xml"s, {}, {} } } )
+  REQUIRE( config.reporterSpecifications == vec_Specs{ { "xml", "output.xml"s, {}, {}, {} }, { "junit", "output-junit.xml"s, {}, {}, {} } } )
 with expansion:
   { {?}, {?} } == { {?}, {?} }
 
@@ -10139,7 +10236,7 @@ with expansion:
   {?}
 
 CmdLine.tests.cpp:<line number>: PASSED:
-  REQUIRE( config.reporterSpecifications == vec_Specs{ { "xml", "output.xml"s, {}, {} }, { "console", {}, {}, {} } } )
+  REQUIRE( config.reporterSpecifications == vec_Specs{ { "xml", "output.xml"s, {}, {}, {} }, { "console", {}, {}, {}, {} } } )
 with expansion:
   { {?}, {?} } == { {?}, {?} }
 
@@ -11134,7 +11231,7 @@ Reporters.tests.cpp:<line number>: PASSED:
   REQUIRE_THAT( listingString, ContainsSubstring("fakeTag"s) )
 with expansion:
   "{
-    "version": 1,
+    "version": 2,
     "metadata": {
       "name": "",
       "rng-seed": 1234,
@@ -11174,7 +11271,7 @@ Reporters.tests.cpp:<line number>: PASSED:
   REQUIRE_THAT( listingString, ContainsSubstring("fake reporter"s) )
 with expansion:
   "{
-    "version": 1,
+    "version": 2,
     "metadata": {
       "name": "",
       "rng-seed": 1234,
@@ -11212,7 +11309,7 @@ Reporters.tests.cpp:<line number>: PASSED:
   REQUIRE_THAT( listingString, ContainsSubstring( "fake test name"s ) && ContainsSubstring( "fakeTestTag"s ) )
 with expansion:
   "{
-    "version": 1,
+    "version": 2,
     "metadata": {
       "name": "",
       "rng-seed": 1234,
@@ -11222,14 +11319,9 @@ with expansion:
       "tests": [
         {
           "name": "fake test name",
-          "class-name": "",
           "tags": [
             "fakeTestTag"
-          ],
-          "source-location": {
-            "filename": "fake-file.cpp",
-            "line": 123456789
-          }
+          ]
         }
       ]" ( contains: "fake test name" and contains: "fakeTestTag" )
 with message:
@@ -12096,7 +12188,7 @@ with expansion:
 Matchers.tests.cpp:<line number>: PASSED:
   CHECK_THAT( testStringForMatching(), ContainsSubstring( "aBC", Catch::CaseSensitive::No ) )
 with expansion:
-  "this string contains 'abc' as a substring" contains: "abc" (case
+  "this string contains 'abc' as a substring" contains: "aBC" (case
   insensitive)
 
 Matchers.tests.cpp:<line number>: PASSED:
@@ -12107,7 +12199,7 @@ with expansion:
 Matchers.tests.cpp:<line number>: PASSED:
   CHECK_THAT( testStringForMatching(), StartsWith( "THIS", Catch::CaseSensitive::No ) )
 with expansion:
-  "this string contains 'abc' as a substring" starts with: "this" (case
+  "this string contains 'abc' as a substring" starts with: "THIS" (case
   insensitive)
 
 Matchers.tests.cpp:<line number>: PASSED:
@@ -12118,7 +12210,7 @@ with expansion:
 Matchers.tests.cpp:<line number>: PASSED:
   CHECK_THAT( testStringForMatching(), EndsWith( " SuBsTrInG", Catch::CaseSensitive::No ) )
 with expansion:
-  "this string contains 'abc' as a substring" ends with: " substring" (case
+  "this string contains 'abc' as a substring" ends with: " SuBsTrInG" (case
   insensitive)
 
 -------------------------------------------------------------------------------
@@ -20123,6 +20215,6 @@ Misc.tests.cpp:<line number>
 Misc.tests.cpp:<line number>: PASSED:
 
 ===============================================================================
-test cases:  451 |  331 passed |  96 failed | 6 skipped | 18 failed as expected
-assertions: 2416 | 2215 passed | 158 failed | 43 failed as expected
+test cases:  454 |  334 passed |  96 failed | 6 skipped | 18 failed as expected
+assertions: 2423 | 2222 passed | 158 failed | 43 failed as expected
 

tests/SelfTest/Baselines/junit.sw.approved.txt

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <testsuitesloose text artifact
 >
-  <testsuite name="<exe-name>" errors="17" failures="141" skipped="12" tests="2428" hostname="tbd" time="{duration}" timestamp="{iso8601-timestamp}">
+  <testsuite name="<exe-name>" errors="17" failures="141" skipped="12" tests="2435" hostname="tbd" time="{duration}" timestamp="{iso8601-timestamp}">
     <properties>
       <property name="random-seed" value="1"/>
       <property name="filters" value="&quot;*&quot; ~[!nonportable] ~[!benchmark] ~[approvals]"/>
@@ -774,6 +774,15 @@ at Condition.tests.cpp:<line number>
     <testcase classname="<exe-name>.global" name="JsonWriter escapes characters in strings properly/carriage return in a string is escaped" time="{duration}" status="run"/>
     <testcase classname="<exe-name>.global" name="JsonWriter escapes characters in strings properly/tab in a string is escaped" time="{duration}" status="run"/>
     <testcase classname="<exe-name>.global" name="JsonWriter escapes characters in strings properly/combination of characters is escaped" time="{duration}" status="run"/>
+    <testcase classname="<exe-name>.global" name="JsonWriter serializes non-finite FP using Python spelling - double" time="{duration}" status="run"/>
+    <testcase classname="<exe-name>.global" name="JsonWriter serializes non-finite FP using Python spelling - double/NaN" time="{duration}" status="run"/>
+    <testcase classname="<exe-name>.global" name="JsonWriter serializes non-finite FP using Python spelling - double/Pos nf" time="{duration}" status="run"/>
+    <testcase classname="<exe-name>.global" name="JsonWriter serializes non-finite FP using Python spelling - double/Neg inf" time="{duration}" status="run"/>
+    <testcase classname="<exe-name>.global" name="JsonWriter serializes non-finite FP using Python spelling - float" time="{duration}" status="run"/>
+    <testcase classname="<exe-name>.global" name="JsonWriter serializes non-finite FP using Python spelling - float/NaN" time="{duration}" status="run"/>
+    <testcase classname="<exe-name>.global" name="JsonWriter serializes non-finite FP using Python spelling - float/Pos nf" time="{duration}" status="run"/>
+    <testcase classname="<exe-name>.global" name="JsonWriter serializes non-finite FP using Python spelling - float/Neg inf" time="{duration}" status="run"/>
+    <testcase classname="<exe-name>.global" name="JsonWriter serializes numbers independently of the global locale" time="{duration}" status="run"/>
     <testcase classname="<exe-name>.global" name="Lambdas in assertions" time="{duration}" status="run"/>
     <testcase classname="<exe-name>.global" name="Less-than inequalities with different epsilons" time="{duration}" status="run"/>
     <testcase classname="<exe-name>.global" name="ManuallyRegistered" time="{duration}" status="run"/>

tests/SelfTest/Baselines/junit.sw.multi.approved.txt

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <testsuites>
-  <testsuite name="<exe-name>" errors="17" failures="141" skipped="12" tests="2428" hostname="tbd" time="{duration}" timestamp="{iso8601-timestamp}">
+  <testsuite name="<exe-name>" errors="17" failures="141" skipped="12" tests="2435" hostname="tbd" time="{duration}" timestamp="{iso8601-timestamp}">
     <properties>
       <property name="random-seed" value="1"/>
       <property name="filters" value="&quot;*&quot; ~[!nonportable] ~[!benchmark] ~[approvals]"/>
@@ -773,6 +773,15 @@ at Condition.tests.cpp:<line number>
     <testcase classname="<exe-name>.global" name="JsonWriter escapes characters in strings properly/carriage return in a string is escaped" time="{duration}" status="run"/>
     <testcase classname="<exe-name>.global" name="JsonWriter escapes characters in strings properly/tab in a string is escaped" time="{duration}" status="run"/>
     <testcase classname="<exe-name>.global" name="JsonWriter escapes characters in strings properly/combination of characters is escaped" time="{duration}" status="run"/>
+    <testcase classname="<exe-name>.global" name="JsonWriter serializes non-finite FP using Python spelling - double" time="{duration}" status="run"/>
+    <testcase classname="<exe-name>.global" name="JsonWriter serializes non-finite FP using Python spelling - double/NaN" time="{duration}" status="run"/>
+    <testcase classname="<exe-name>.global" name="JsonWriter serializes non-finite FP using Python spelling - double/Pos nf" time="{duration}" status="run"/>
+    <testcase classname="<exe-name>.global" name="JsonWriter serializes non-finite FP using Python spelling - double/Neg inf" time="{duration}" status="run"/>
+    <testcase classname="<exe-name>.global" name="JsonWriter serializes non-finite FP using Python spelling - float" time="{duration}" status="run"/>
+    <testcase classname="<exe-name>.global" name="JsonWriter serializes non-finite FP using Python spelling - float/NaN" time="{duration}" status="run"/>
+    <testcase classname="<exe-name>.global" name="JsonWriter serializes non-finite FP using Python spelling - float/Pos nf" time="{duration}" status="run"/>
+    <testcase classname="<exe-name>.global" name="JsonWriter serializes non-finite FP using Python spelling - float/Neg inf" time="{duration}" status="run"/>
+    <testcase classname="<exe-name>.global" name="JsonWriter serializes numbers independently of the global locale" time="{duration}" status="run"/>
     <testcase classname="<exe-name>.global" name="Lambdas in assertions" time="{duration}" status="run"/>
     <testcase classname="<exe-name>.global" name="Less-than inequalities with different epsilons" time="{duration}" status="run"/>
     <testcase classname="<exe-name>.global" name="ManuallyRegistered" time="{duration}" status="run"/>

tests/SelfTest/Baselines/sonarqube.sw.approved.txt

@@ -262,6 +262,15 @@ at AssertionHandler.tests.cpp:<line number>
     <testCase name="JsonWriter escapes characters in strings properly/carriage return in a string is escaped" duration="{duration}"/>
     <testCase name="JsonWriter escapes characters in strings properly/tab in a string is escaped" duration="{duration}"/>
     <testCase name="JsonWriter escapes characters in strings properly/combination of characters is escaped" duration="{duration}"/>
+    <testCase name="JsonWriter serializes non-finite FP using Python spelling - double" duration="{duration}"/>
+    <testCase name="JsonWriter serializes non-finite FP using Python spelling - double/NaN" duration="{duration}"/>
+    <testCase name="JsonWriter serializes non-finite FP using Python spelling - double/Pos nf" duration="{duration}"/>
+    <testCase name="JsonWriter serializes non-finite FP using Python spelling - double/Neg inf" duration="{duration}"/>
+    <testCase name="JsonWriter serializes non-finite FP using Python spelling - float" duration="{duration}"/>
+    <testCase name="JsonWriter serializes non-finite FP using Python spelling - float/NaN" duration="{duration}"/>
+    <testCase name="JsonWriter serializes non-finite FP using Python spelling - float/Pos nf" duration="{duration}"/>
+    <testCase name="JsonWriter serializes non-finite FP using Python spelling - float/Neg inf" duration="{duration}"/>
+    <testCase name="JsonWriter serializes numbers independently of the global locale" duration="{duration}"/>
   </file>
   <file path="tests/<exe-name>/IntrospectiveTests/Parse.tests.cpp">
     <testCase name="Parse uints" duration="{duration}"/>

tests/SelfTest/Baselines/sonarqube.sw.multi.approved.txt

@@ -261,6 +261,15 @@ at AssertionHandler.tests.cpp:<line number>
     <testCase name="JsonWriter escapes characters in strings properly/carriage return in a string is escaped" duration="{duration}"/>
     <testCase name="JsonWriter escapes characters in strings properly/tab in a string is escaped" duration="{duration}"/>
     <testCase name="JsonWriter escapes characters in strings properly/combination of characters is escaped" duration="{duration}"/>
+    <testCase name="JsonWriter serializes non-finite FP using Python spelling - double" duration="{duration}"/>
+    <testCase name="JsonWriter serializes non-finite FP using Python spelling - double/NaN" duration="{duration}"/>
+    <testCase name="JsonWriter serializes non-finite FP using Python spelling - double/Pos nf" duration="{duration}"/>
+    <testCase name="JsonWriter serializes non-finite FP using Python spelling - double/Neg inf" duration="{duration}"/>
+    <testCase name="JsonWriter serializes non-finite FP using Python spelling - float" duration="{duration}"/>
+    <testCase name="JsonWriter serializes non-finite FP using Python spelling - float/NaN" duration="{duration}"/>
+    <testCase name="JsonWriter serializes non-finite FP using Python spelling - float/Pos nf" duration="{duration}"/>
+    <testCase name="JsonWriter serializes non-finite FP using Python spelling - float/Neg inf" duration="{duration}"/>
+    <testCase name="JsonWriter serializes numbers independently of the global locale" duration="{duration}"/>
   </file>
   <file path="tests/<exe-name>/IntrospectiveTests/Parse.tests.cpp">
     <testCase name="Parse uints" duration="{duration}"/>

tests/SelfTest/Baselines/tap.sw.approved.txt

@@ -1131,7 +1131,7 @@ ok {test-number} - x == Approx( 1.3 ) for: 1.30000000000000027 == Approx( 1.3000
 # Equals
 ok {test-number} - testStringForMatching(), Equals( "this string contains 'abc' as a substring" ) for: "this string contains 'abc' as a substring" equals: "this string contains 'abc' as a substring"
 # Equals
-ok {test-number} - testStringForMatching(), Equals( "this string contains 'ABC' as a substring", Catch::CaseSensitive::No ) for: "this string contains 'abc' as a substring" equals: "this string contains 'abc' as a substring" (case insensitive)
+ok {test-number} - testStringForMatching(), Equals( "this string contains 'ABC' as a substring", Catch::CaseSensitive::No ) for: "this string contains 'abc' as a substring" equals: "this string contains 'ABC' as a substring" (case insensitive)
 # Equals string matcher
 not ok {test-number} - testStringForMatching(), Equals( "this string contains 'ABC' as a substring" ) for: "this string contains 'abc' as a substring" equals: "this string contains 'ABC' as a substring"
 # Equals string matcher
@@ -1169,7 +1169,7 @@ ok {test-number} - throwsSpecialException( 2 ), SpecialException, MessageMatches
 # Exception messages can be tested for
 ok {test-number} - thisThrows(), "expected exception" for: "expected exception" equals: "expected exception"
 # Exception messages can be tested for
-ok {test-number} - thisThrows(), Equals( "expecteD Exception", Catch::CaseSensitive::No ) for: "expected exception" equals: "expected exception" (case insensitive)
+ok {test-number} - thisThrows(), Equals( "expecteD Exception", Catch::CaseSensitive::No ) for: "expected exception" equals: "expecteD Exception" (case insensitive)
 # Exception messages can be tested for
 ok {test-number} - thisThrows(), StartsWith( "expected" ) for: "expected exception" starts with: "expected"
 # Exception messages can be tested for
@@ -1177,7 +1177,7 @@ ok {test-number} - thisThrows(), EndsWith( "exception" ) for: "expected exceptio
 # Exception messages can be tested for
 ok {test-number} - thisThrows(), ContainsSubstring( "except" ) for: "expected exception" contains: "except"
 # Exception messages can be tested for
-ok {test-number} - thisThrows(), ContainsSubstring( "exCept", Catch::CaseSensitive::No ) for: "expected exception" contains: "except" (case insensitive)
+ok {test-number} - thisThrows(), ContainsSubstring( "exCept", Catch::CaseSensitive::No ) for: "expected exception" contains: "exCept" (case insensitive)
 # Exception thrown inside stringify does not fail the test
 ok {test-number} - tos == tos for: { stringification failed with an exception: "Invalid" } == { stringification failed with an exception: "Invalid" }
 # Exceptions matchers
@@ -2054,6 +2054,20 @@ ok {test-number} - sstream.str() == "\"\\r\"" for: ""\r"" == ""\r""
 ok {test-number} - sstream.str() == "\"\\t\"" for: ""\t"" == ""\t""
 # JsonWriter escapes characters in strings properly
 ok {test-number} - sstream.str() == "\"\\\\/\\t\\r\\n\"" for: ""\\/\t\r\n"" == ""\\/\t\r\n""
+# JsonWriter serializes non-finite FP using Python spelling - double
+ok {test-number} - sstream.str() == "NaN" for: "NaN" == "NaN"
+# JsonWriter serializes non-finite FP using Python spelling - double
+ok {test-number} - sstream.str() == "Infinity" for: "Infinity" == "Infinity"
+# JsonWriter serializes non-finite FP using Python spelling - double
+ok {test-number} - sstream.str() == "-Infinity" for: "-Infinity" == "-Infinity"
+# JsonWriter serializes non-finite FP using Python spelling - float
+ok {test-number} - sstream.str() == "NaN" for: "NaN" == "NaN"
+# JsonWriter serializes non-finite FP using Python spelling - float
+ok {test-number} - sstream.str() == "Infinity" for: "Infinity" == "Infinity"
+# JsonWriter serializes non-finite FP using Python spelling - float
+ok {test-number} - sstream.str() == "-Infinity" for: "-Infinity" == "-Infinity"
+# JsonWriter serializes numbers independently of the global locale
+ok {test-number} - sstream.str(), ContainsSubstring( "\"double\": 1.5," ) && ContainsSubstring( "\"int\": 1234567," ) && ContainsSubstring( "\"bool-1\": true," ) && ContainsSubstring( "\"bool-2\": false," ) && ContainsSubstring( "\"array\": [\n    2.5,\n    1234567\n  ]\n}" ) for: "{   "double": 1.5,   "int": 1234567,   "bool-1": true,   "bool-2": false,   "array": [     2.5,     1234567   ] }" ( contains: ""double": 1.5," and contains: ""int": 1234567," and contains: ""bool-1": true," and contains: ""bool-2": false," and contains: ""array": [     2.5,     1234567   ] }" )
 # Lambdas in assertions
 ok {test-number} - []() { return true; }() for: true
 # Less-than inequalities with different epsilons
@@ -2501,11 +2515,11 @@ ok {test-number} - !(cfg.hasTestFilters()) for: !false
 # Process can be configured on command line
 ok {test-number} - cfg.getReporterSpecs().size() == 1 for: 1 == 1
 # Process can be configured on command line
-ok {test-number} - cfg.getReporterSpecs()[0] == Catch::ReporterSpec{ expectedReporter, {}, {}, {} } for: {?} == {?}
+ok {test-number} - cfg.getReporterSpecs()[0] == Catch::ReporterSpec{ expectedReporter, {}, {}, {}, {} } for: {?} == {?}
 # Process can be configured on command line
 ok {test-number} - cfg.getProcessedReporterSpecs().size() == 1 for: 1 == 1
 # Process can be configured on command line
-ok {test-number} - cfg.getProcessedReporterSpecs()[0] == Catch::ProcessedReporterSpec{ expectedReporter, std::string{}, Catch::ColourMode::PlatformDefault, {} } for: {?} == {?}
+ok {test-number} - cfg.getProcessedReporterSpecs()[0] == Catch::ProcessedReporterSpec{ expectedReporter, std::string{}, Catch::ColourMode::PlatformDefault, Catch::Verbosity::Normal, {} } for: {?} == {?}
 # Process can be configured on command line
 ok {test-number} - result for: {?}
 # Process can be configured on command line
@@ -2533,15 +2547,15 @@ ok {test-number} - cfg.testSpec().matches(*fakeTestCase("alwaysIncluded")) for:
 # Process can be configured on command line
 ok {test-number} - result for: {?} with 1 message: 'result.errorMessage() := ""'
 # Process can be configured on command line
-ok {test-number} - config.reporterSpecifications == vec_Specs{ { "console", {}, {}, {} } } for: { {?} } == { {?} } with 1 message: 'result.errorMessage() := ""'
+ok {test-number} - config.reporterSpecifications == vec_Specs{ { "console", {}, {}, {}, {} } } for: { {?} } == { {?} } with 1 message: 'result.errorMessage() := ""'
 # Process can be configured on command line
 ok {test-number} - result for: {?} with 1 message: 'result.errorMessage() := ""'
 # Process can be configured on command line
-ok {test-number} - config.reporterSpecifications == vec_Specs{ { "xml", {}, {}, {} } } for: { {?} } == { {?} } with 1 message: 'result.errorMessage() := ""'
+ok {test-number} - config.reporterSpecifications == vec_Specs{ { "xml", {}, {}, {}, {} } } for: { {?} } == { {?} } with 1 message: 'result.errorMessage() := ""'
 # Process can be configured on command line
 ok {test-number} - result for: {?} with 1 message: 'result.errorMessage() := ""'
 # Process can be configured on command line
-ok {test-number} - config.reporterSpecifications == vec_Specs{ { "junit", {}, {}, {} } } for: { {?} } == { {?} } with 1 message: 'result.errorMessage() := ""'
+ok {test-number} - config.reporterSpecifications == vec_Specs{ { "junit", {}, {}, {}, {} } } for: { {?} } == { {?} } with 1 message: 'result.errorMessage() := ""'
 # Process can be configured on command line
 ok {test-number} - !result for: true
 # Process can be configured on command line
@@ -2549,19 +2563,19 @@ ok {test-number} - result.errorMessage(), ContainsSubstring("Unrecognized report
 # Process can be configured on command line
 ok {test-number} - result for: {?} with 1 message: 'result.errorMessage() := ""'
 # Process can be configured on command line
-ok {test-number} - config.reporterSpecifications == vec_Specs{ { "console", "out.txt"s, {}, {} } } for: { {?} } == { {?} } with 1 message: 'result.errorMessage() := ""'
+ok {test-number} - config.reporterSpecifications == vec_Specs{ { "console", "out.txt"s, {}, {}, {} } } for: { {?} } == { {?} } with 1 message: 'result.errorMessage() := ""'
 # Process can be configured on command line
 ok {test-number} - result for: {?} with 1 message: 'result.errorMessage() := ""'
 # Process can be configured on command line
-ok {test-number} - config.reporterSpecifications == vec_Specs{ { "console", "C:\\Temp\\out.txt"s, {}, {} } } for: { {?} } == { {?} } with 1 message: 'result.errorMessage() := ""'
+ok {test-number} - config.reporterSpecifications == vec_Specs{ { "console", "C:\\Temp\\out.txt"s, {}, {}, {} } } for: { {?} } == { {?} } with 1 message: 'result.errorMessage() := ""'
 # Process can be configured on command line
 ok {test-number} - cli.parse({ "test", "-r", "xml::out=output.xml", "-r", "junit::out=output-junit.xml" }) for: {?}
 # Process can be configured on command line
-ok {test-number} - config.reporterSpecifications == vec_Specs{ { "xml", "output.xml"s, {}, {} }, { "junit", "output-junit.xml"s, {}, {} } } for: { {?}, {?} } == { {?}, {?} }
+ok {test-number} - config.reporterSpecifications == vec_Specs{ { "xml", "output.xml"s, {}, {}, {} }, { "junit", "output-junit.xml"s, {}, {}, {} } } for: { {?}, {?} } == { {?}, {?} }
 # Process can be configured on command line
 ok {test-number} - cli.parse({ "test", "-r", "xml::out=output.xml", "-r", "console" }) for: {?}
 # Process can be configured on command line
-ok {test-number} - config.reporterSpecifications == vec_Specs{ { "xml", "output.xml"s, {}, {} }, { "console", {}, {}, {} } } for: { {?}, {?} } == { {?}, {?} }
+ok {test-number} - config.reporterSpecifications == vec_Specs{ { "xml", "output.xml"s, {}, {}, {} }, { "console", {}, {}, {}, {} } } for: { {?}, {?} } == { {?}, {?} }
 # Process can be configured on command line
 ok {test-number} - !result for: true
 # Process can be configured on command line
@@ -2753,15 +2767,15 @@ ok {test-number} - listingString, ContainsSubstring( "fake test name"s ) && Cont
 # Reporter's write listings to provided stream
 ok {test-number} - !(factories.empty()) for: !false
 # Reporter's write listings to provided stream
-ok {test-number} - listingString, ContainsSubstring("fakeTag"s) for: "{   "version": 1,   "metadata": {     "name": "",     "rng-seed": 1234,     "catch2-version": "<version>"   },   "listings": {     "tags": [       {         "aliases": [           "fakeTag"         ],         "count": 1       }     ]" contains: "fakeTag" with 1 message: 'Tested reporter: JSON'
+ok {test-number} - listingString, ContainsSubstring("fakeTag"s) for: "{   "version": 2,   "metadata": {     "name": "",     "rng-seed": 1234,     "catch2-version": "<version>"   },   "listings": {     "tags": [       {         "aliases": [           "fakeTag"         ],         "count": 1       }     ]" contains: "fakeTag" with 1 message: 'Tested reporter: JSON'
 # Reporter's write listings to provided stream
 ok {test-number} - !(factories.empty()) for: !false
 # Reporter's write listings to provided stream
-ok {test-number} - listingString, ContainsSubstring("fake reporter"s) for: "{   "version": 1,   "metadata": {     "name": "",     "rng-seed": 1234,     "catch2-version": "<version>"   },   "listings": {     "reporters": [       {         "name": "fake reporter",         "description": "fake description"       }     ]" contains: "fake reporter" with 1 message: 'Tested reporter: JSON'
+ok {test-number} - listingString, ContainsSubstring("fake reporter"s) for: "{   "version": 2,   "metadata": {     "name": "",     "rng-seed": 1234,     "catch2-version": "<version>"   },   "listings": {     "reporters": [       {         "name": "fake reporter",         "description": "fake description"       }     ]" contains: "fake reporter" with 1 message: 'Tested reporter: JSON'
 # Reporter's write listings to provided stream
 ok {test-number} - !(factories.empty()) for: !false
 # Reporter's write listings to provided stream
-ok {test-number} - listingString, ContainsSubstring( "fake test name"s ) && ContainsSubstring( "fakeTestTag"s ) for: "{   "version": 1,   "metadata": {     "name": "",     "rng-seed": 1234,     "catch2-version": "<version>"   },   "listings": {     "tests": [       {         "name": "fake test name",         "class-name": "",         "tags": [           "fakeTestTag"         ],         "source-location": {           "filename": "fake-file.cpp",           "line": 123456789         }       }     ]" ( contains: "fake test name" and contains: "fakeTestTag" ) with 1 message: 'Tested reporter: JSON'
+ok {test-number} - listingString, ContainsSubstring( "fake test name"s ) && ContainsSubstring( "fakeTestTag"s ) for: "{   "version": 2,   "metadata": {     "name": "",     "rng-seed": 1234,     "catch2-version": "<version>"   },   "listings": {     "tests": [       {         "name": "fake test name",         "tags": [           "fakeTestTag"         ]       }     ]" ( contains: "fake test name" and contains: "fakeTestTag" ) with 1 message: 'Tested reporter: JSON'
 # Reporter's write listings to provided stream
 ok {test-number} - !(factories.empty()) for: !false
 # Reporter's write listings to provided stream
@@ -2902,15 +2916,15 @@ ok {test-number} - testStringForMatching(), ContainsSubstring( "string", Catch::
 # String matchers
 ok {test-number} - testStringForMatching(), ContainsSubstring( "abc" ) for: "this string contains 'abc' as a substring" contains: "abc"
 # String matchers
-ok {test-number} - testStringForMatching(), ContainsSubstring( "aBC", Catch::CaseSensitive::No ) for: "this string contains 'abc' as a substring" contains: "abc" (case insensitive)
+ok {test-number} - testStringForMatching(), ContainsSubstring( "aBC", Catch::CaseSensitive::No ) for: "this string contains 'abc' as a substring" contains: "aBC" (case insensitive)
 # String matchers
 ok {test-number} - testStringForMatching(), StartsWith( "this" ) for: "this string contains 'abc' as a substring" starts with: "this"
 # String matchers
-ok {test-number} - testStringForMatching(), StartsWith( "THIS", Catch::CaseSensitive::No ) for: "this string contains 'abc' as a substring" starts with: "this" (case insensitive)
+ok {test-number} - testStringForMatching(), StartsWith( "THIS", Catch::CaseSensitive::No ) for: "this string contains 'abc' as a substring" starts with: "THIS" (case insensitive)
 # String matchers
 ok {test-number} - testStringForMatching(), EndsWith( "substring" ) for: "this string contains 'abc' as a substring" ends with: "substring"
 # String matchers
-ok {test-number} - testStringForMatching(), EndsWith( " SuBsTrInG", Catch::CaseSensitive::No ) for: "this string contains 'abc' as a substring" ends with: " substring" (case insensitive)
+ok {test-number} - testStringForMatching(), EndsWith( " SuBsTrInG", Catch::CaseSensitive::No ) for: "this string contains 'abc' as a substring" ends with: " SuBsTrInG" (case insensitive)
 # StringRef
 ok {test-number} - empty.empty() for: true
 # StringRef
@@ -4851,5 +4865,5 @@ ok {test-number} - q3 == 23. for: 23.0 == 23.0
 ok {test-number} -
 # xmlentitycheck
 ok {test-number} -
-1..2428
+1..2435
 

tests/SelfTest/Baselines/tap.sw.multi.approved.txt

@@ -1129,7 +1129,7 @@ ok {test-number} - x == Approx( 1.3 ) for: 1.30000000000000027 == Approx( 1.3000
 # Equals
 ok {test-number} - testStringForMatching(), Equals( "this string contains 'abc' as a substring" ) for: "this string contains 'abc' as a substring" equals: "this string contains 'abc' as a substring"
 # Equals
-ok {test-number} - testStringForMatching(), Equals( "this string contains 'ABC' as a substring", Catch::CaseSensitive::No ) for: "this string contains 'abc' as a substring" equals: "this string contains 'abc' as a substring" (case insensitive)
+ok {test-number} - testStringForMatching(), Equals( "this string contains 'ABC' as a substring", Catch::CaseSensitive::No ) for: "this string contains 'abc' as a substring" equals: "this string contains 'ABC' as a substring" (case insensitive)
 # Equals string matcher
 not ok {test-number} - testStringForMatching(), Equals( "this string contains 'ABC' as a substring" ) for: "this string contains 'abc' as a substring" equals: "this string contains 'ABC' as a substring"
 # Equals string matcher
@@ -1167,7 +1167,7 @@ ok {test-number} - throwsSpecialException( 2 ), SpecialException, MessageMatches
 # Exception messages can be tested for
 ok {test-number} - thisThrows(), "expected exception" for: "expected exception" equals: "expected exception"
 # Exception messages can be tested for
-ok {test-number} - thisThrows(), Equals( "expecteD Exception", Catch::CaseSensitive::No ) for: "expected exception" equals: "expected exception" (case insensitive)
+ok {test-number} - thisThrows(), Equals( "expecteD Exception", Catch::CaseSensitive::No ) for: "expected exception" equals: "expecteD Exception" (case insensitive)
 # Exception messages can be tested for
 ok {test-number} - thisThrows(), StartsWith( "expected" ) for: "expected exception" starts with: "expected"
 # Exception messages can be tested for
@@ -1175,7 +1175,7 @@ ok {test-number} - thisThrows(), EndsWith( "exception" ) for: "expected exceptio
 # Exception messages can be tested for
 ok {test-number} - thisThrows(), ContainsSubstring( "except" ) for: "expected exception" contains: "except"
 # Exception messages can be tested for
-ok {test-number} - thisThrows(), ContainsSubstring( "exCept", Catch::CaseSensitive::No ) for: "expected exception" contains: "except" (case insensitive)
+ok {test-number} - thisThrows(), ContainsSubstring( "exCept", Catch::CaseSensitive::No ) for: "expected exception" contains: "exCept" (case insensitive)
 # Exception thrown inside stringify does not fail the test
 ok {test-number} - tos == tos for: { stringification failed with an exception: "Invalid" } == { stringification failed with an exception: "Invalid" }
 # Exceptions matchers
@@ -2052,6 +2052,20 @@ ok {test-number} - sstream.str() == "\"\\r\"" for: ""\r"" == ""\r""
 ok {test-number} - sstream.str() == "\"\\t\"" for: ""\t"" == ""\t""
 # JsonWriter escapes characters in strings properly
 ok {test-number} - sstream.str() == "\"\\\\/\\t\\r\\n\"" for: ""\\/\t\r\n"" == ""\\/\t\r\n""
+# JsonWriter serializes non-finite FP using Python spelling - double
+ok {test-number} - sstream.str() == "NaN" for: "NaN" == "NaN"
+# JsonWriter serializes non-finite FP using Python spelling - double
+ok {test-number} - sstream.str() == "Infinity" for: "Infinity" == "Infinity"
+# JsonWriter serializes non-finite FP using Python spelling - double
+ok {test-number} - sstream.str() == "-Infinity" for: "-Infinity" == "-Infinity"
+# JsonWriter serializes non-finite FP using Python spelling - float
+ok {test-number} - sstream.str() == "NaN" for: "NaN" == "NaN"
+# JsonWriter serializes non-finite FP using Python spelling - float
+ok {test-number} - sstream.str() == "Infinity" for: "Infinity" == "Infinity"
+# JsonWriter serializes non-finite FP using Python spelling - float
+ok {test-number} - sstream.str() == "-Infinity" for: "-Infinity" == "-Infinity"
+# JsonWriter serializes numbers independently of the global locale
+ok {test-number} - sstream.str(), ContainsSubstring( "\"double\": 1.5," ) && ContainsSubstring( "\"int\": 1234567," ) && ContainsSubstring( "\"bool-1\": true," ) && ContainsSubstring( "\"bool-2\": false," ) && ContainsSubstring( "\"array\": [\n    2.5,\n    1234567\n  ]\n}" ) for: "{   "double": 1.5,   "int": 1234567,   "bool-1": true,   "bool-2": false,   "array": [     2.5,     1234567   ] }" ( contains: ""double": 1.5," and contains: ""int": 1234567," and contains: ""bool-1": true," and contains: ""bool-2": false," and contains: ""array": [     2.5,     1234567   ] }" )
 # Lambdas in assertions
 ok {test-number} - []() { return true; }() for: true
 # Less-than inequalities with different epsilons
@@ -2499,11 +2513,11 @@ ok {test-number} - !(cfg.hasTestFilters()) for: !false
 # Process can be configured on command line
 ok {test-number} - cfg.getReporterSpecs().size() == 1 for: 1 == 1
 # Process can be configured on command line
-ok {test-number} - cfg.getReporterSpecs()[0] == Catch::ReporterSpec{ expectedReporter, {}, {}, {} } for: {?} == {?}
+ok {test-number} - cfg.getReporterSpecs()[0] == Catch::ReporterSpec{ expectedReporter, {}, {}, {}, {} } for: {?} == {?}
 # Process can be configured on command line
 ok {test-number} - cfg.getProcessedReporterSpecs().size() == 1 for: 1 == 1
 # Process can be configured on command line
-ok {test-number} - cfg.getProcessedReporterSpecs()[0] == Catch::ProcessedReporterSpec{ expectedReporter, std::string{}, Catch::ColourMode::PlatformDefault, {} } for: {?} == {?}
+ok {test-number} - cfg.getProcessedReporterSpecs()[0] == Catch::ProcessedReporterSpec{ expectedReporter, std::string{}, Catch::ColourMode::PlatformDefault, Catch::Verbosity::Normal, {} } for: {?} == {?}
 # Process can be configured on command line
 ok {test-number} - result for: {?}
 # Process can be configured on command line
@@ -2531,15 +2545,15 @@ ok {test-number} - cfg.testSpec().matches(*fakeTestCase("alwaysIncluded")) for:
 # Process can be configured on command line
 ok {test-number} - result for: {?} with 1 message: 'result.errorMessage() := ""'
 # Process can be configured on command line
-ok {test-number} - config.reporterSpecifications == vec_Specs{ { "console", {}, {}, {} } } for: { {?} } == { {?} } with 1 message: 'result.errorMessage() := ""'
+ok {test-number} - config.reporterSpecifications == vec_Specs{ { "console", {}, {}, {}, {} } } for: { {?} } == { {?} } with 1 message: 'result.errorMessage() := ""'
 # Process can be configured on command line
 ok {test-number} - result for: {?} with 1 message: 'result.errorMessage() := ""'
 # Process can be configured on command line
-ok {test-number} - config.reporterSpecifications == vec_Specs{ { "xml", {}, {}, {} } } for: { {?} } == { {?} } with 1 message: 'result.errorMessage() := ""'
+ok {test-number} - config.reporterSpecifications == vec_Specs{ { "xml", {}, {}, {}, {} } } for: { {?} } == { {?} } with 1 message: 'result.errorMessage() := ""'
 # Process can be configured on command line
 ok {test-number} - result for: {?} with 1 message: 'result.errorMessage() := ""'
 # Process can be configured on command line
-ok {test-number} - config.reporterSpecifications == vec_Specs{ { "junit", {}, {}, {} } } for: { {?} } == { {?} } with 1 message: 'result.errorMessage() := ""'
+ok {test-number} - config.reporterSpecifications == vec_Specs{ { "junit", {}, {}, {}, {} } } for: { {?} } == { {?} } with 1 message: 'result.errorMessage() := ""'
 # Process can be configured on command line
 ok {test-number} - !result for: true
 # Process can be configured on command line
@@ -2547,19 +2561,19 @@ ok {test-number} - result.errorMessage(), ContainsSubstring("Unrecognized report
 # Process can be configured on command line
 ok {test-number} - result for: {?} with 1 message: 'result.errorMessage() := ""'
 # Process can be configured on command line
-ok {test-number} - config.reporterSpecifications == vec_Specs{ { "console", "out.txt"s, {}, {} } } for: { {?} } == { {?} } with 1 message: 'result.errorMessage() := ""'
+ok {test-number} - config.reporterSpecifications == vec_Specs{ { "console", "out.txt"s, {}, {}, {} } } for: { {?} } == { {?} } with 1 message: 'result.errorMessage() := ""'
 # Process can be configured on command line
 ok {test-number} - result for: {?} with 1 message: 'result.errorMessage() := ""'
 # Process can be configured on command line
-ok {test-number} - config.reporterSpecifications == vec_Specs{ { "console", "C:\\Temp\\out.txt"s, {}, {} } } for: { {?} } == { {?} } with 1 message: 'result.errorMessage() := ""'
+ok {test-number} - config.reporterSpecifications == vec_Specs{ { "console", "C:\\Temp\\out.txt"s, {}, {}, {} } } for: { {?} } == { {?} } with 1 message: 'result.errorMessage() := ""'
 # Process can be configured on command line
 ok {test-number} - cli.parse({ "test", "-r", "xml::out=output.xml", "-r", "junit::out=output-junit.xml" }) for: {?}
 # Process can be configured on command line
-ok {test-number} - config.reporterSpecifications == vec_Specs{ { "xml", "output.xml"s, {}, {} }, { "junit", "output-junit.xml"s, {}, {} } } for: { {?}, {?} } == { {?}, {?} }
+ok {test-number} - config.reporterSpecifications == vec_Specs{ { "xml", "output.xml"s, {}, {}, {} }, { "junit", "output-junit.xml"s, {}, {}, {} } } for: { {?}, {?} } == { {?}, {?} }
 # Process can be configured on command line
 ok {test-number} - cli.parse({ "test", "-r", "xml::out=output.xml", "-r", "console" }) for: {?}
 # Process can be configured on command line
-ok {test-number} - config.reporterSpecifications == vec_Specs{ { "xml", "output.xml"s, {}, {} }, { "console", {}, {}, {} } } for: { {?}, {?} } == { {?}, {?} }
+ok {test-number} - config.reporterSpecifications == vec_Specs{ { "xml", "output.xml"s, {}, {}, {} }, { "console", {}, {}, {}, {} } } for: { {?}, {?} } == { {?}, {?} }
 # Process can be configured on command line
 ok {test-number} - !result for: true
 # Process can be configured on command line
@@ -2751,15 +2765,15 @@ ok {test-number} - listingString, ContainsSubstring( "fake test name"s ) && Cont
 # Reporter's write listings to provided stream
 ok {test-number} - !(factories.empty()) for: !false
 # Reporter's write listings to provided stream
-ok {test-number} - listingString, ContainsSubstring("fakeTag"s) for: "{   "version": 1,   "metadata": {     "name": "",     "rng-seed": 1234,     "catch2-version": "<version>"   },   "listings": {     "tags": [       {         "aliases": [           "fakeTag"         ],         "count": 1       }     ]" contains: "fakeTag" with 1 message: 'Tested reporter: JSON'
+ok {test-number} - listingString, ContainsSubstring("fakeTag"s) for: "{   "version": 2,   "metadata": {     "name": "",     "rng-seed": 1234,     "catch2-version": "<version>"   },   "listings": {     "tags": [       {         "aliases": [           "fakeTag"         ],         "count": 1       }     ]" contains: "fakeTag" with 1 message: 'Tested reporter: JSON'
 # Reporter's write listings to provided stream
 ok {test-number} - !(factories.empty()) for: !false
 # Reporter's write listings to provided stream
-ok {test-number} - listingString, ContainsSubstring("fake reporter"s) for: "{   "version": 1,   "metadata": {     "name": "",     "rng-seed": 1234,     "catch2-version": "<version>"   },   "listings": {     "reporters": [       {         "name": "fake reporter",         "description": "fake description"       }     ]" contains: "fake reporter" with 1 message: 'Tested reporter: JSON'
+ok {test-number} - listingString, ContainsSubstring("fake reporter"s) for: "{   "version": 2,   "metadata": {     "name": "",     "rng-seed": 1234,     "catch2-version": "<version>"   },   "listings": {     "reporters": [       {         "name": "fake reporter",         "description": "fake description"       }     ]" contains: "fake reporter" with 1 message: 'Tested reporter: JSON'
 # Reporter's write listings to provided stream
 ok {test-number} - !(factories.empty()) for: !false
 # Reporter's write listings to provided stream
-ok {test-number} - listingString, ContainsSubstring( "fake test name"s ) && ContainsSubstring( "fakeTestTag"s ) for: "{   "version": 1,   "metadata": {     "name": "",     "rng-seed": 1234,     "catch2-version": "<version>"   },   "listings": {     "tests": [       {         "name": "fake test name",         "class-name": "",         "tags": [           "fakeTestTag"         ],         "source-location": {           "filename": "fake-file.cpp",           "line": 123456789         }       }     ]" ( contains: "fake test name" and contains: "fakeTestTag" ) with 1 message: 'Tested reporter: JSON'
+ok {test-number} - listingString, ContainsSubstring( "fake test name"s ) && ContainsSubstring( "fakeTestTag"s ) for: "{   "version": 2,   "metadata": {     "name": "",     "rng-seed": 1234,     "catch2-version": "<version>"   },   "listings": {     "tests": [       {         "name": "fake test name",         "tags": [           "fakeTestTag"         ]       }     ]" ( contains: "fake test name" and contains: "fakeTestTag" ) with 1 message: 'Tested reporter: JSON'
 # Reporter's write listings to provided stream
 ok {test-number} - !(factories.empty()) for: !false
 # Reporter's write listings to provided stream
@@ -2895,15 +2909,15 @@ ok {test-number} - testStringForMatching(), ContainsSubstring( "string", Catch::
 # String matchers
 ok {test-number} - testStringForMatching(), ContainsSubstring( "abc" ) for: "this string contains 'abc' as a substring" contains: "abc"
 # String matchers
-ok {test-number} - testStringForMatching(), ContainsSubstring( "aBC", Catch::CaseSensitive::No ) for: "this string contains 'abc' as a substring" contains: "abc" (case insensitive)
+ok {test-number} - testStringForMatching(), ContainsSubstring( "aBC", Catch::CaseSensitive::No ) for: "this string contains 'abc' as a substring" contains: "aBC" (case insensitive)
 # String matchers
 ok {test-number} - testStringForMatching(), StartsWith( "this" ) for: "this string contains 'abc' as a substring" starts with: "this"
 # String matchers
-ok {test-number} - testStringForMatching(), StartsWith( "THIS", Catch::CaseSensitive::No ) for: "this string contains 'abc' as a substring" starts with: "this" (case insensitive)
+ok {test-number} - testStringForMatching(), StartsWith( "THIS", Catch::CaseSensitive::No ) for: "this string contains 'abc' as a substring" starts with: "THIS" (case insensitive)
 # String matchers
 ok {test-number} - testStringForMatching(), EndsWith( "substring" ) for: "this string contains 'abc' as a substring" ends with: "substring"
 # String matchers
-ok {test-number} - testStringForMatching(), EndsWith( " SuBsTrInG", Catch::CaseSensitive::No ) for: "this string contains 'abc' as a substring" ends with: " substring" (case insensitive)
+ok {test-number} - testStringForMatching(), EndsWith( " SuBsTrInG", Catch::CaseSensitive::No ) for: "this string contains 'abc' as a substring" ends with: " SuBsTrInG" (case insensitive)
 # StringRef
 ok {test-number} - empty.empty() for: true
 # StringRef
@@ -4840,5 +4854,5 @@ ok {test-number} - q3 == 23. for: 23.0 == 23.0
 ok {test-number} -
 # xmlentitycheck
 ok {test-number} -
-1..2428
+1..2435
 

tests/SelfTest/Baselines/teamcity.sw.approved.txt

@@ -470,6 +470,12 @@
 ##teamcity[testFinished name='JsonWriter' duration="{duration}"]
 ##teamcity[testStarted name='JsonWriter escapes characters in strings properly']
 ##teamcity[testFinished name='JsonWriter escapes characters in strings properly' duration="{duration}"]
+##teamcity[testStarted name='JsonWriter serializes non-finite FP using Python spelling - double']
+##teamcity[testFinished name='JsonWriter serializes non-finite FP using Python spelling - double' duration="{duration}"]
+##teamcity[testStarted name='JsonWriter serializes non-finite FP using Python spelling - float']
+##teamcity[testFinished name='JsonWriter serializes non-finite FP using Python spelling - float' duration="{duration}"]
+##teamcity[testStarted name='JsonWriter serializes numbers independently of the global locale']
+##teamcity[testFinished name='JsonWriter serializes numbers independently of the global locale' duration="{duration}"]
 ##teamcity[testStarted name='Lambdas in assertions']
 ##teamcity[testFinished name='Lambdas in assertions' duration="{duration}"]
 ##teamcity[testStarted name='Less-than inequalities with different epsilons']

tests/SelfTest/Baselines/teamcity.sw.multi.approved.txt

@@ -470,6 +470,12 @@
 ##teamcity[testFinished name='JsonWriter' duration="{duration}"]
 ##teamcity[testStarted name='JsonWriter escapes characters in strings properly']
 ##teamcity[testFinished name='JsonWriter escapes characters in strings properly' duration="{duration}"]
+##teamcity[testStarted name='JsonWriter serializes non-finite FP using Python spelling - double']
+##teamcity[testFinished name='JsonWriter serializes non-finite FP using Python spelling - double' duration="{duration}"]
+##teamcity[testStarted name='JsonWriter serializes non-finite FP using Python spelling - float']
+##teamcity[testFinished name='JsonWriter serializes non-finite FP using Python spelling - float' duration="{duration}"]
+##teamcity[testStarted name='JsonWriter serializes numbers independently of the global locale']
+##teamcity[testFinished name='JsonWriter serializes numbers independently of the global locale' duration="{duration}"]
 ##teamcity[testStarted name='Lambdas in assertions']
 ##teamcity[testFinished name='Lambdas in assertions' duration="{duration}"]
 ##teamcity[testStarted name='Less-than inequalities with different epsilons']

tests/SelfTest/Baselines/xml.sw.approved.txt

@@ -5102,7 +5102,7 @@ Approx( 1.30000000000000004 )
         testStringForMatching(), Equals( "this string contains 'ABC' as a substring", Catch::CaseSensitive::No )
       </Original>
       <Expanded>
-        "this string contains 'abc' as a substring" equals: "this string contains 'abc' as a substring" (case insensitive)
+        "this string contains 'abc' as a substring" equals: "this string contains 'ABC' as a substring" (case insensitive)
       </Expanded>
     </Expression>
     <OverallResult success="true" skips="0"/>
@@ -5295,7 +5295,7 @@ Approx( 1.30000000000000004 )
           thisThrows(), Equals( "expecteD Exception", Catch::CaseSensitive::No )
         </Original>
         <Expanded>
-          "expected exception" equals: "expected exception" (case insensitive)
+          "expected exception" equals: "expecteD Exception" (case insensitive)
         </Expanded>
       </Expression>
       <OverallResults successes="1" failures="0" expectedFailures="0" skipped="false"/>
@@ -5330,7 +5330,7 @@ Approx( 1.30000000000000004 )
           thisThrows(), ContainsSubstring( "exCept", Catch::CaseSensitive::No )
         </Original>
         <Expanded>
-          "expected exception" contains: "except" (case insensitive)
+          "expected exception" contains: "exCept" (case insensitive)
         </Expanded>
       </Expression>
       <OverallResults successes="4" failures="0" expectedFailures="0" skipped="false"/>
@@ -9894,6 +9894,102 @@ Approx( 3.14150000000000018 )
     </Section>
     <OverallResult success="true" skips="0"/>
   </TestCase>
+  <TestCase name="JsonWriter serializes non-finite FP using Python spelling - double" tags="[floating-point][JsonWriter]" filename="tests/<exe-name>/IntrospectiveTests/Json.tests.cpp" >
+    <Section name="NaN" filename="tests/<exe-name>/IntrospectiveTests/Json.tests.cpp" >
+      <Expression success="true" type="REQUIRE" filename="tests/<exe-name>/IntrospectiveTests/Json.tests.cpp" >
+        <Original>
+          sstream.str() == "NaN"
+        </Original>
+        <Expanded>
+          "NaN" == "NaN"
+        </Expanded>
+      </Expression>
+      <OverallResults successes="1" failures="0" expectedFailures="0" skipped="false"/>
+    </Section>
+    <Section name="Pos nf" filename="tests/<exe-name>/IntrospectiveTests/Json.tests.cpp" >
+      <Expression success="true" type="REQUIRE" filename="tests/<exe-name>/IntrospectiveTests/Json.tests.cpp" >
+        <Original>
+          sstream.str() == "Infinity"
+        </Original>
+        <Expanded>
+          "Infinity" == "Infinity"
+        </Expanded>
+      </Expression>
+      <OverallResults successes="1" failures="0" expectedFailures="0" skipped="false"/>
+    </Section>
+    <Section name="Neg inf" filename="tests/<exe-name>/IntrospectiveTests/Json.tests.cpp" >
+      <Expression success="true" type="REQUIRE" filename="tests/<exe-name>/IntrospectiveTests/Json.tests.cpp" >
+        <Original>
+          sstream.str() == "-Infinity"
+        </Original>
+        <Expanded>
+          "-Infinity" == "-Infinity"
+        </Expanded>
+      </Expression>
+      <OverallResults successes="1" failures="0" expectedFailures="0" skipped="false"/>
+    </Section>
+    <OverallResult success="true" skips="0"/>
+  </TestCase>
+  <TestCase name="JsonWriter serializes non-finite FP using Python spelling - float" tags="[floating-point][JsonWriter]" filename="tests/<exe-name>/IntrospectiveTests/Json.tests.cpp" >
+    <Section name="NaN" filename="tests/<exe-name>/IntrospectiveTests/Json.tests.cpp" >
+      <Expression success="true" type="REQUIRE" filename="tests/<exe-name>/IntrospectiveTests/Json.tests.cpp" >
+        <Original>
+          sstream.str() == "NaN"
+        </Original>
+        <Expanded>
+          "NaN" == "NaN"
+        </Expanded>
+      </Expression>
+      <OverallResults successes="1" failures="0" expectedFailures="0" skipped="false"/>
+    </Section>
+    <Section name="Pos nf" filename="tests/<exe-name>/IntrospectiveTests/Json.tests.cpp" >
+      <Expression success="true" type="REQUIRE" filename="tests/<exe-name>/IntrospectiveTests/Json.tests.cpp" >
+        <Original>
+          sstream.str() == "Infinity"
+        </Original>
+        <Expanded>
+          "Infinity" == "Infinity"
+        </Expanded>
+      </Expression>
+      <OverallResults successes="1" failures="0" expectedFailures="0" skipped="false"/>
+    </Section>
+    <Section name="Neg inf" filename="tests/<exe-name>/IntrospectiveTests/Json.tests.cpp" >
+      <Expression success="true" type="REQUIRE" filename="tests/<exe-name>/IntrospectiveTests/Json.tests.cpp" >
+        <Original>
+          sstream.str() == "-Infinity"
+        </Original>
+        <Expanded>
+          "-Infinity" == "-Infinity"
+        </Expanded>
+      </Expression>
+      <OverallResults successes="1" failures="0" expectedFailures="0" skipped="false"/>
+    </Section>
+    <OverallResult success="true" skips="0"/>
+  </TestCase>
+  <TestCase name="JsonWriter serializes numbers independently of the global locale" tags="[JsonWriter]" filename="tests/<exe-name>/IntrospectiveTests/Json.tests.cpp" >
+    <Expression success="true" type="REQUIRE_THAT" filename="tests/<exe-name>/IntrospectiveTests/Json.tests.cpp" >
+      <Original>
+        sstream.str(), ContainsSubstring( "\"double\": 1.5," ) &amp;&amp; ContainsSubstring( "\"int\": 1234567," ) &amp;&amp; ContainsSubstring( "\"bool-1\": true," ) &amp;&amp; ContainsSubstring( "\"bool-2\": false," ) &amp;&amp; ContainsSubstring( "\"array\": [\n    2.5,\n    1234567\n  ]\n}" )
+      </Original>
+      <Expanded>
+        "{
+  "double": 1.5,
+  "int": 1234567,
+  "bool-1": true,
+  "bool-2": false,
+  "array": [
+    2.5,
+    1234567
+  ]
+}" ( contains: ""double": 1.5," and contains: ""int": 1234567," and contains: ""bool-1": true," and contains: ""bool-2": false," and contains: ""array": [
+    2.5,
+    1234567
+  ]
+}" )
+      </Expanded>
+    </Expression>
+    <OverallResult success="true" skips="0"/>
+  </TestCase>
   <TestCase name="Lambdas in assertions" filename="tests/<exe-name>/UsageTests/Compilation.tests.cpp" >
     <Expression success="true" type="REQUIRE" filename="tests/<exe-name>/UsageTests/Compilation.tests.cpp" >
       <Original>
@@ -11880,7 +11976,7 @@ Approx( 1.21999999999999997 )
       </Expression>
       <Expression success="true" type="CHECK" filename="tests/<exe-name>/IntrospectiveTests/CmdLine.tests.cpp" >
         <Original>
-          cfg.getReporterSpecs()[0] == Catch::ReporterSpec{ expectedReporter, {}, {}, {} }
+          cfg.getReporterSpecs()[0] == Catch::ReporterSpec{ expectedReporter, {}, {}, {}, {} }
         </Original>
         <Expanded>
           {?} == {?}
@@ -11896,7 +11992,7 @@ Approx( 1.21999999999999997 )
       </Expression>
       <Expression success="true" type="CHECK" filename="tests/<exe-name>/IntrospectiveTests/CmdLine.tests.cpp" >
         <Original>
-          cfg.getProcessedReporterSpecs()[0] == Catch::ProcessedReporterSpec{ expectedReporter, std::string{}, Catch::ColourMode::PlatformDefault, {} }
+          cfg.getProcessedReporterSpecs()[0] == Catch::ProcessedReporterSpec{ expectedReporter, std::string{}, Catch::ColourMode::PlatformDefault, Catch::Verbosity::Normal, {} }
         </Original>
         <Expanded>
           {?} == {?}
@@ -12036,7 +12132,7 @@ Approx( 1.21999999999999997 )
         </Info>
         <Expression success="true" type="REQUIRE" filename="tests/<exe-name>/IntrospectiveTests/CmdLine.tests.cpp" >
           <Original>
-            config.reporterSpecifications == vec_Specs{ { "console", {}, {}, {} } }
+            config.reporterSpecifications == vec_Specs{ { "console", {}, {}, {}, {} } }
           </Original>
           <Expanded>
             { {?} } == { {?} }
@@ -12064,7 +12160,7 @@ Approx( 1.21999999999999997 )
         </Info>
         <Expression success="true" type="REQUIRE" filename="tests/<exe-name>/IntrospectiveTests/CmdLine.tests.cpp" >
           <Original>
-            config.reporterSpecifications == vec_Specs{ { "xml", {}, {}, {} } }
+            config.reporterSpecifications == vec_Specs{ { "xml", {}, {}, {}, {} } }
           </Original>
           <Expanded>
             { {?} } == { {?} }
@@ -12092,7 +12188,7 @@ Approx( 1.21999999999999997 )
         </Info>
         <Expression success="true" type="REQUIRE" filename="tests/<exe-name>/IntrospectiveTests/CmdLine.tests.cpp" >
           <Original>
-            config.reporterSpecifications == vec_Specs{ { "junit", {}, {}, {} } }
+            config.reporterSpecifications == vec_Specs{ { "junit", {}, {}, {}, {} } }
           </Original>
           <Expanded>
             { {?} } == { {?} }
@@ -12142,7 +12238,7 @@ Approx( 1.21999999999999997 )
         </Info>
         <Expression success="true" type="REQUIRE" filename="tests/<exe-name>/IntrospectiveTests/CmdLine.tests.cpp" >
           <Original>
-            config.reporterSpecifications == vec_Specs{ { "console", "out.txt"s, {}, {} } }
+            config.reporterSpecifications == vec_Specs{ { "console", "out.txt"s, {}, {}, {} } }
           </Original>
           <Expanded>
             { {?} } == { {?} }
@@ -12170,7 +12266,7 @@ Approx( 1.21999999999999997 )
         </Info>
         <Expression success="true" type="REQUIRE" filename="tests/<exe-name>/IntrospectiveTests/CmdLine.tests.cpp" >
           <Original>
-            config.reporterSpecifications == vec_Specs{ { "console", "C:\\Temp\\out.txt"s, {}, {} } }
+            config.reporterSpecifications == vec_Specs{ { "console", "C:\\Temp\\out.txt"s, {}, {}, {} } }
           </Original>
           <Expanded>
             { {?} } == { {?} }
@@ -12193,7 +12289,7 @@ Approx( 1.21999999999999997 )
           </Expression>
           <Expression success="true" type="REQUIRE" filename="tests/<exe-name>/IntrospectiveTests/CmdLine.tests.cpp" >
             <Original>
-              config.reporterSpecifications == vec_Specs{ { "xml", "output.xml"s, {}, {} }, { "junit", "output-junit.xml"s, {}, {} } }
+              config.reporterSpecifications == vec_Specs{ { "xml", "output.xml"s, {}, {}, {} }, { "junit", "output-junit.xml"s, {}, {}, {} } }
             </Original>
             <Expanded>
               { {?}, {?} } == { {?}, {?} }
@@ -12218,7 +12314,7 @@ Approx( 1.21999999999999997 )
           </Expression>
           <Expression success="true" type="REQUIRE" filename="tests/<exe-name>/IntrospectiveTests/CmdLine.tests.cpp" >
             <Original>
-              config.reporterSpecifications == vec_Specs{ { "xml", "output.xml"s, {}, {} }, { "console", {}, {}, {} } }
+              config.reporterSpecifications == vec_Specs{ { "xml", "output.xml"s, {}, {}, {} }, { "console", {}, {}, {}, {} } }
             </Original>
             <Expanded>
               { {?}, {?} } == { {?}, {?} }
@@ -13323,7 +13419,7 @@ Approx( 0.98999999999999999 )
         </Original>
         <Expanded>
           "{
-  "version": 1,
+  "version": 2,
   "metadata": {
     "name": "",
     "rng-seed": 1234,
@@ -13360,7 +13456,7 @@ Approx( 0.98999999999999999 )
         </Original>
         <Expanded>
           "{
-  "version": 1,
+  "version": 2,
   "metadata": {
     "name": "",
     "rng-seed": 1234,
@@ -13395,7 +13491,7 @@ Approx( 0.98999999999999999 )
         </Original>
         <Expanded>
           "{
-  "version": 1,
+  "version": 2,
   "metadata": {
     "name": "",
     "rng-seed": 1234,
@@ -13405,14 +13501,9 @@ Approx( 0.98999999999999999 )
     "tests": [
       {
         "name": "fake test name",
-        "class-name": "",
         "tags": [
           "fakeTestTag"
-        ],
-        "source-location": {
-          "filename": "fake-file.cpp",
-          "line": 123456789
-        }
+        ]
       }
     ]" ( contains: "fake test name" and contains: "fakeTestTag" )
         </Expanded>
@@ -14266,7 +14357,7 @@ Message from section two
         testStringForMatching(), ContainsSubstring( "aBC", Catch::CaseSensitive::No )
       </Original>
       <Expanded>
-        "this string contains 'abc' as a substring" contains: "abc" (case insensitive)
+        "this string contains 'abc' as a substring" contains: "aBC" (case insensitive)
       </Expanded>
     </Expression>
     <Expression success="true" type="CHECK_THAT" filename="tests/<exe-name>/UsageTests/Matchers.tests.cpp" >
@@ -14282,7 +14373,7 @@ Message from section two
         testStringForMatching(), StartsWith( "THIS", Catch::CaseSensitive::No )
       </Original>
       <Expanded>
-        "this string contains 'abc' as a substring" starts with: "this" (case insensitive)
+        "this string contains 'abc' as a substring" starts with: "THIS" (case insensitive)
       </Expanded>
     </Expression>
     <Expression success="true" type="CHECK_THAT" filename="tests/<exe-name>/UsageTests/Matchers.tests.cpp" >
@@ -14298,7 +14389,7 @@ Message from section two
         testStringForMatching(), EndsWith( " SuBsTrInG", Catch::CaseSensitive::No )
       </Original>
       <Expanded>
-        "this string contains 'abc' as a substring" ends with: " substring" (case insensitive)
+        "this string contains 'abc' as a substring" ends with: " SuBsTrInG" (case insensitive)
       </Expanded>
     </Expression>
     <OverallResult success="true" skips="0"/>
@@ -23385,6 +23476,6 @@ Approx( -1.95996398454005449 )
     </Section>
     <OverallResult success="true" skips="0"/>
   </TestCase>
-  <OverallResults successes="2215" failures="158" expectedFailures="43" skips="12"/>
-  <OverallResultsCases successes="331" failures="96" expectedFailures="18" skips="6"/>
+  <OverallResults successes="2222" failures="158" expectedFailures="43" skips="12"/>
+  <OverallResultsCases successes="334" failures="96" expectedFailures="18" skips="6"/>
 </Catch2TestRun>

tests/SelfTest/Baselines/xml.sw.multi.approved.txt

@@ -5102,7 +5102,7 @@ Approx( 1.30000000000000004 )
         testStringForMatching(), Equals( "this string contains 'ABC' as a substring", Catch::CaseSensitive::No )
       </Original>
       <Expanded>
-        "this string contains 'abc' as a substring" equals: "this string contains 'abc' as a substring" (case insensitive)
+        "this string contains 'abc' as a substring" equals: "this string contains 'ABC' as a substring" (case insensitive)
       </Expanded>
     </Expression>
     <OverallResult success="true" skips="0"/>
@@ -5295,7 +5295,7 @@ Approx( 1.30000000000000004 )
           thisThrows(), Equals( "expecteD Exception", Catch::CaseSensitive::No )
         </Original>
         <Expanded>
-          "expected exception" equals: "expected exception" (case insensitive)
+          "expected exception" equals: "expecteD Exception" (case insensitive)
         </Expanded>
       </Expression>
       <OverallResults successes="1" failures="0" expectedFailures="0" skipped="false"/>
@@ -5330,7 +5330,7 @@ Approx( 1.30000000000000004 )
           thisThrows(), ContainsSubstring( "exCept", Catch::CaseSensitive::No )
         </Original>
         <Expanded>
-          "expected exception" contains: "except" (case insensitive)
+          "expected exception" contains: "exCept" (case insensitive)
         </Expanded>
       </Expression>
       <OverallResults successes="4" failures="0" expectedFailures="0" skipped="false"/>
@@ -9894,6 +9894,102 @@ Approx( 3.14150000000000018 )
     </Section>
     <OverallResult success="true" skips="0"/>
   </TestCase>
+  <TestCase name="JsonWriter serializes non-finite FP using Python spelling - double" tags="[floating-point][JsonWriter]" filename="tests/<exe-name>/IntrospectiveTests/Json.tests.cpp" >
+    <Section name="NaN" filename="tests/<exe-name>/IntrospectiveTests/Json.tests.cpp" >
+      <Expression success="true" type="REQUIRE" filename="tests/<exe-name>/IntrospectiveTests/Json.tests.cpp" >
+        <Original>
+          sstream.str() == "NaN"
+        </Original>
+        <Expanded>
+          "NaN" == "NaN"
+        </Expanded>
+      </Expression>
+      <OverallResults successes="1" failures="0" expectedFailures="0" skipped="false"/>
+    </Section>
+    <Section name="Pos nf" filename="tests/<exe-name>/IntrospectiveTests/Json.tests.cpp" >
+      <Expression success="true" type="REQUIRE" filename="tests/<exe-name>/IntrospectiveTests/Json.tests.cpp" >
+        <Original>
+          sstream.str() == "Infinity"
+        </Original>
+        <Expanded>
+          "Infinity" == "Infinity"
+        </Expanded>
+      </Expression>
+      <OverallResults successes="1" failures="0" expectedFailures="0" skipped="false"/>
+    </Section>
+    <Section name="Neg inf" filename="tests/<exe-name>/IntrospectiveTests/Json.tests.cpp" >
+      <Expression success="true" type="REQUIRE" filename="tests/<exe-name>/IntrospectiveTests/Json.tests.cpp" >
+        <Original>
+          sstream.str() == "-Infinity"
+        </Original>
+        <Expanded>
+          "-Infinity" == "-Infinity"
+        </Expanded>
+      </Expression>
+      <OverallResults successes="1" failures="0" expectedFailures="0" skipped="false"/>
+    </Section>
+    <OverallResult success="true" skips="0"/>
+  </TestCase>
+  <TestCase name="JsonWriter serializes non-finite FP using Python spelling - float" tags="[floating-point][JsonWriter]" filename="tests/<exe-name>/IntrospectiveTests/Json.tests.cpp" >
+    <Section name="NaN" filename="tests/<exe-name>/IntrospectiveTests/Json.tests.cpp" >
+      <Expression success="true" type="REQUIRE" filename="tests/<exe-name>/IntrospectiveTests/Json.tests.cpp" >
+        <Original>
+          sstream.str() == "NaN"
+        </Original>
+        <Expanded>
+          "NaN" == "NaN"
+        </Expanded>
+      </Expression>
+      <OverallResults successes="1" failures="0" expectedFailures="0" skipped="false"/>
+    </Section>
+    <Section name="Pos nf" filename="tests/<exe-name>/IntrospectiveTests/Json.tests.cpp" >
+      <Expression success="true" type="REQUIRE" filename="tests/<exe-name>/IntrospectiveTests/Json.tests.cpp" >
+        <Original>
+          sstream.str() == "Infinity"
+        </Original>
+        <Expanded>
+          "Infinity" == "Infinity"
+        </Expanded>
+      </Expression>
+      <OverallResults successes="1" failures="0" expectedFailures="0" skipped="false"/>
+    </Section>
+    <Section name="Neg inf" filename="tests/<exe-name>/IntrospectiveTests/Json.tests.cpp" >
+      <Expression success="true" type="REQUIRE" filename="tests/<exe-name>/IntrospectiveTests/Json.tests.cpp" >
+        <Original>
+          sstream.str() == "-Infinity"
+        </Original>
+        <Expanded>
+          "-Infinity" == "-Infinity"
+        </Expanded>
+      </Expression>
+      <OverallResults successes="1" failures="0" expectedFailures="0" skipped="false"/>
+    </Section>
+    <OverallResult success="true" skips="0"/>
+  </TestCase>
+  <TestCase name="JsonWriter serializes numbers independently of the global locale" tags="[JsonWriter]" filename="tests/<exe-name>/IntrospectiveTests/Json.tests.cpp" >
+    <Expression success="true" type="REQUIRE_THAT" filename="tests/<exe-name>/IntrospectiveTests/Json.tests.cpp" >
+      <Original>
+        sstream.str(), ContainsSubstring( "\"double\": 1.5," ) &amp;&amp; ContainsSubstring( "\"int\": 1234567," ) &amp;&amp; ContainsSubstring( "\"bool-1\": true," ) &amp;&amp; ContainsSubstring( "\"bool-2\": false," ) &amp;&amp; ContainsSubstring( "\"array\": [\n    2.5,\n    1234567\n  ]\n}" )
+      </Original>
+      <Expanded>
+        "{
+  "double": 1.5,
+  "int": 1234567,
+  "bool-1": true,
+  "bool-2": false,
+  "array": [
+    2.5,
+    1234567
+  ]
+}" ( contains: ""double": 1.5," and contains: ""int": 1234567," and contains: ""bool-1": true," and contains: ""bool-2": false," and contains: ""array": [
+    2.5,
+    1234567
+  ]
+}" )
+      </Expanded>
+    </Expression>
+    <OverallResult success="true" skips="0"/>
+  </TestCase>
   <TestCase name="Lambdas in assertions" filename="tests/<exe-name>/UsageTests/Compilation.tests.cpp" >
     <Expression success="true" type="REQUIRE" filename="tests/<exe-name>/UsageTests/Compilation.tests.cpp" >
       <Original>
@@ -11880,7 +11976,7 @@ Approx( 1.21999999999999997 )
       </Expression>
       <Expression success="true" type="CHECK" filename="tests/<exe-name>/IntrospectiveTests/CmdLine.tests.cpp" >
         <Original>
-          cfg.getReporterSpecs()[0] == Catch::ReporterSpec{ expectedReporter, {}, {}, {} }
+          cfg.getReporterSpecs()[0] == Catch::ReporterSpec{ expectedReporter, {}, {}, {}, {} }
         </Original>
         <Expanded>
           {?} == {?}
@@ -11896,7 +11992,7 @@ Approx( 1.21999999999999997 )
       </Expression>
       <Expression success="true" type="CHECK" filename="tests/<exe-name>/IntrospectiveTests/CmdLine.tests.cpp" >
         <Original>
-          cfg.getProcessedReporterSpecs()[0] == Catch::ProcessedReporterSpec{ expectedReporter, std::string{}, Catch::ColourMode::PlatformDefault, {} }
+          cfg.getProcessedReporterSpecs()[0] == Catch::ProcessedReporterSpec{ expectedReporter, std::string{}, Catch::ColourMode::PlatformDefault, Catch::Verbosity::Normal, {} }
         </Original>
         <Expanded>
           {?} == {?}
@@ -12036,7 +12132,7 @@ Approx( 1.21999999999999997 )
         </Info>
         <Expression success="true" type="REQUIRE" filename="tests/<exe-name>/IntrospectiveTests/CmdLine.tests.cpp" >
           <Original>
-            config.reporterSpecifications == vec_Specs{ { "console", {}, {}, {} } }
+            config.reporterSpecifications == vec_Specs{ { "console", {}, {}, {}, {} } }
           </Original>
           <Expanded>
             { {?} } == { {?} }
@@ -12064,7 +12160,7 @@ Approx( 1.21999999999999997 )
         </Info>
         <Expression success="true" type="REQUIRE" filename="tests/<exe-name>/IntrospectiveTests/CmdLine.tests.cpp" >
           <Original>
-            config.reporterSpecifications == vec_Specs{ { "xml", {}, {}, {} } }
+            config.reporterSpecifications == vec_Specs{ { "xml", {}, {}, {}, {} } }
           </Original>
           <Expanded>
             { {?} } == { {?} }
@@ -12092,7 +12188,7 @@ Approx( 1.21999999999999997 )
         </Info>
         <Expression success="true" type="REQUIRE" filename="tests/<exe-name>/IntrospectiveTests/CmdLine.tests.cpp" >
           <Original>
-            config.reporterSpecifications == vec_Specs{ { "junit", {}, {}, {} } }
+            config.reporterSpecifications == vec_Specs{ { "junit", {}, {}, {}, {} } }
           </Original>
           <Expanded>
             { {?} } == { {?} }
@@ -12142,7 +12238,7 @@ Approx( 1.21999999999999997 )
         </Info>
         <Expression success="true" type="REQUIRE" filename="tests/<exe-name>/IntrospectiveTests/CmdLine.tests.cpp" >
           <Original>
-            config.reporterSpecifications == vec_Specs{ { "console", "out.txt"s, {}, {} } }
+            config.reporterSpecifications == vec_Specs{ { "console", "out.txt"s, {}, {}, {} } }
           </Original>
           <Expanded>
             { {?} } == { {?} }
@@ -12170,7 +12266,7 @@ Approx( 1.21999999999999997 )
         </Info>
         <Expression success="true" type="REQUIRE" filename="tests/<exe-name>/IntrospectiveTests/CmdLine.tests.cpp" >
           <Original>
-            config.reporterSpecifications == vec_Specs{ { "console", "C:\\Temp\\out.txt"s, {}, {} } }
+            config.reporterSpecifications == vec_Specs{ { "console", "C:\\Temp\\out.txt"s, {}, {}, {} } }
           </Original>
           <Expanded>
             { {?} } == { {?} }
@@ -12193,7 +12289,7 @@ Approx( 1.21999999999999997 )
           </Expression>
           <Expression success="true" type="REQUIRE" filename="tests/<exe-name>/IntrospectiveTests/CmdLine.tests.cpp" >
             <Original>
-              config.reporterSpecifications == vec_Specs{ { "xml", "output.xml"s, {}, {} }, { "junit", "output-junit.xml"s, {}, {} } }
+              config.reporterSpecifications == vec_Specs{ { "xml", "output.xml"s, {}, {}, {} }, { "junit", "output-junit.xml"s, {}, {}, {} } }
             </Original>
             <Expanded>
               { {?}, {?} } == { {?}, {?} }
@@ -12218,7 +12314,7 @@ Approx( 1.21999999999999997 )
           </Expression>
           <Expression success="true" type="REQUIRE" filename="tests/<exe-name>/IntrospectiveTests/CmdLine.tests.cpp" >
             <Original>
-              config.reporterSpecifications == vec_Specs{ { "xml", "output.xml"s, {}, {} }, { "console", {}, {}, {} } }
+              config.reporterSpecifications == vec_Specs{ { "xml", "output.xml"s, {}, {}, {} }, { "console", {}, {}, {}, {} } }
             </Original>
             <Expanded>
               { {?}, {?} } == { {?}, {?} }
@@ -13323,7 +13419,7 @@ Approx( 0.98999999999999999 )
         </Original>
         <Expanded>
           "{
-  "version": 1,
+  "version": 2,
   "metadata": {
     "name": "",
     "rng-seed": 1234,
@@ -13360,7 +13456,7 @@ Approx( 0.98999999999999999 )
         </Original>
         <Expanded>
           "{
-  "version": 1,
+  "version": 2,
   "metadata": {
     "name": "",
     "rng-seed": 1234,
@@ -13395,7 +13491,7 @@ Approx( 0.98999999999999999 )
         </Original>
         <Expanded>
           "{
-  "version": 1,
+  "version": 2,
   "metadata": {
     "name": "",
     "rng-seed": 1234,
@@ -13405,14 +13501,9 @@ Approx( 0.98999999999999999 )
     "tests": [
       {
         "name": "fake test name",
-        "class-name": "",
         "tags": [
           "fakeTestTag"
-        ],
-        "source-location": {
-          "filename": "fake-file.cpp",
-          "line": 123456789
-        }
+        ]
       }
     ]" ( contains: "fake test name" and contains: "fakeTestTag" )
         </Expanded>
@@ -14266,7 +14357,7 @@ Message from section two
         testStringForMatching(), ContainsSubstring( "aBC", Catch::CaseSensitive::No )
       </Original>
       <Expanded>
-        "this string contains 'abc' as a substring" contains: "abc" (case insensitive)
+        "this string contains 'abc' as a substring" contains: "aBC" (case insensitive)
       </Expanded>
     </Expression>
     <Expression success="true" type="CHECK_THAT" filename="tests/<exe-name>/UsageTests/Matchers.tests.cpp" >
@@ -14282,7 +14373,7 @@ Message from section two
         testStringForMatching(), StartsWith( "THIS", Catch::CaseSensitive::No )
       </Original>
       <Expanded>
-        "this string contains 'abc' as a substring" starts with: "this" (case insensitive)
+        "this string contains 'abc' as a substring" starts with: "THIS" (case insensitive)
       </Expanded>
     </Expression>
     <Expression success="true" type="CHECK_THAT" filename="tests/<exe-name>/UsageTests/Matchers.tests.cpp" >
@@ -14298,7 +14389,7 @@ Message from section two
         testStringForMatching(), EndsWith( " SuBsTrInG", Catch::CaseSensitive::No )
       </Original>
       <Expanded>
-        "this string contains 'abc' as a substring" ends with: " substring" (case insensitive)
+        "this string contains 'abc' as a substring" ends with: " SuBsTrInG" (case insensitive)
       </Expanded>
     </Expression>
     <OverallResult success="true" skips="0"/>
@@ -23384,6 +23475,6 @@ Approx( -1.95996398454005449 )
     </Section>
     <OverallResult success="true" skips="0"/>
   </TestCase>
-  <OverallResults successes="2215" failures="158" expectedFailures="43" skips="12"/>
-  <OverallResultsCases successes="331" failures="96" expectedFailures="18" skips="6"/>
+  <OverallResults successes="2222" failures="158" expectedFailures="43" skips="12"/>
+  <OverallResultsCases successes="334" failures="96" expectedFailures="18" skips="6"/>
 </Catch2TestRun>

tests/SelfTest/IntrospectiveTests/CmdLine.tests.cpp

@@ -58,12 +58,13 @@ TEST_CASE( "Process can be configured on command line", "[config][command-line]"
 
         CHECK( cfg.getReporterSpecs().size() == 1 );
         CHECK( cfg.getReporterSpecs()[0] ==
-               Catch::ReporterSpec{ expectedReporter, {}, {}, {} } );
+               Catch::ReporterSpec{ expectedReporter, {}, {}, {}, {} } );
         CHECK( cfg.getProcessedReporterSpecs().size() == 1 );
         CHECK( cfg.getProcessedReporterSpecs()[0] ==
                Catch::ProcessedReporterSpec{ expectedReporter,
                                              std::string{},
                                              Catch::ColourMode::PlatformDefault,
+                                             Catch::Verbosity::Normal,
                                              {} } );
     }
 
@@ -108,7 +109,7 @@ TEST_CASE( "Process can be configured on command line", "[config][command-line]"
             CHECK(result);
 
             REQUIRE( config.reporterSpecifications ==
-                     vec_Specs{ { "console", {}, {}, {} } } );
+                     vec_Specs{ { "console", {}, {}, {}, {} } } );
         }
         SECTION("-r/xml") {
             auto result = cli.parse({"test", "-r", "xml"});
@@ -116,7 +117,7 @@ TEST_CASE( "Process can be configured on command line", "[config][command-line]"
             CHECK(result);
 
             REQUIRE( config.reporterSpecifications ==
-                     vec_Specs{ { "xml", {}, {}, {} } } );
+                     vec_Specs{ { "xml", {}, {}, {}, {} } } );
         }
         SECTION("--reporter/junit") {
             auto result = cli.parse({"test", "--reporter", "junit"});
@@ -124,7 +125,7 @@ TEST_CASE( "Process can be configured on command line", "[config][command-line]"
             CHECK(result);
 
             REQUIRE( config.reporterSpecifications ==
-                     vec_Specs{ { "junit", {}, {}, {} } } );
+                     vec_Specs{ { "junit", {}, {}, {}, {} } } );
         }
         SECTION("must match one of the available ones") {
             auto result = cli.parse({"test", "--reporter", "unsupported"});
@@ -137,27 +138,27 @@ TEST_CASE( "Process can be configured on command line", "[config][command-line]"
             CAPTURE(result.errorMessage());
             CHECK(result);
             REQUIRE( config.reporterSpecifications ==
-                     vec_Specs{ { "console", "out.txt"s, {}, {} } } );
+                     vec_Specs{ { "console", "out.txt"s, {}, {}, {} } } );
         }
         SECTION("With Windows-like absolute path as output file") {
             auto result = cli.parse({ "test", "-r", "console::out=C:\\Temp\\out.txt" });
             CAPTURE(result.errorMessage());
             CHECK(result);
             REQUIRE( config.reporterSpecifications ==
-                     vec_Specs{ { "console", "C:\\Temp\\out.txt"s, {}, {} } } );
+                     vec_Specs{ { "console", "C:\\Temp\\out.txt"s, {}, {}, {} } } );
         }
         SECTION("Multiple reporters") {
             SECTION("All with output files") {
                 CHECK(cli.parse({ "test", "-r", "xml::out=output.xml", "-r", "junit::out=output-junit.xml" }));
                 REQUIRE( config.reporterSpecifications ==
-                         vec_Specs{ { "xml", "output.xml"s, {}, {} },
-                               { "junit", "output-junit.xml"s, {}, {} } } );
+                    vec_Specs{ { "xml", "output.xml"s, {}, {}, {} },
+                               { "junit", "output-junit.xml"s, {}, {}, {} } } );
             }
             SECTION("Mixed output files and default output") {
                 CHECK(cli.parse({ "test", "-r", "xml::out=output.xml", "-r", "console" }));
                 REQUIRE( config.reporterSpecifications ==
-                         vec_Specs{ { "xml", "output.xml"s, {}, {} },
-                                    { "console", {}, {}, {} } } );
+                         vec_Specs{ { "xml", "output.xml"s, {}, {}, {} },
+                                    { "console", {}, {}, {}, {} } } );
             }
             SECTION("cannot have multiple reporters with default output") {
                 auto result = cli.parse({ "test", "-r", "console", "-r", "xml::out=output.xml", "-r", "junit" });
@@ -472,15 +473,34 @@ TEST_CASE( "Parse rng seed in different formats", "[approvals][cli][rng-seed]" )
         CAPTURE( seed_string );
 
         auto result = cli.parse( { "tests", "--rng-seed", seed_string } );
-
         REQUIRE( result );
-        REQUIRE( config.rngSeed == seed_value );
+
+        Catch::Config cfg{config};
+        REQUIRE( cfg.rngSeed() == seed_value );
+        REQUIRE( cfg.rngSeedWasFixed() );
+    }
+    SECTION( "time seed is not considered fixed" ) {
+        auto result = cli.parse( { "tests", "--rng-seed", "time" } );
+        REQUIRE( result );
+
+        Catch::Config cfg{config};
+        REQUIRE_FALSE( cfg.rngSeedWasFixed() );
+    }
+    SECTION( "random-device seed is not considered fixed" ) {
+        auto result = cli.parse( { "tests", "--rng-seed", "random-device" } );
+        REQUIRE( result );
+
+        Catch::Config cfg{config};
+        REQUIRE_FALSE( cfg.rngSeedWasFixed() );
     }
     SECTION( "Error cases" ) {
         auto seed_string =
             GENERATE( "0xSEED", "999999999999", "08888", "BEEF", "123 456" );
         CAPTURE( seed_string );
         REQUIRE_FALSE( cli.parse( { "tests", "--rng-seed", seed_string } ) );
+
+        Catch::Config cfg{config};
+        REQUIRE_FALSE( cfg.rngSeedWasFixed() );
     }
 }
 

tests/SelfTest/IntrospectiveTests/CmdLineHelpers.tests.cpp

@@ -63,6 +63,20 @@ TEST_CASE( "Parsing colour mode", "[cli][colour][approvals]" ) {
     }
 }
 
+TEST_CASE( "Parsing verbosity", "[cli][colour][approvals]" ) {
+    using Catch::Detail::stringToVerbosity;
+    using Catch::Verbosity;
+    SECTION( "Valid strings" ) {
+        REQUIRE( stringToVerbosity( "quiet" ) == Verbosity::Quiet );
+        REQUIRE( stringToVerbosity( "normal" ) == Verbosity::Normal );
+        REQUIRE( stringToVerbosity( "high" ) == Verbosity::High );
+    }
+    SECTION( "Wrong strings" ) {
+        REQUIRE_FALSE( stringToVerbosity( "QUIET" ) );
+        REQUIRE_FALSE( stringToVerbosity( "medium" ) );
+        REQUIRE_FALSE( stringToVerbosity( "vvv" ) );
+    }
+}
 
 TEST_CASE("Parsing reporter specs", "[cli][reporter-spec][approvals]") {
     using Catch::parseReporterSpec;
@@ -71,12 +85,13 @@ TEST_CASE("Parsing reporter specs", "[cli][reporter-spec][approvals]") {
 
     SECTION( "Correct specs" ) {
         REQUIRE( parseReporterSpec( "someReporter" ) ==
-                 ReporterSpec( "someReporter"s, {}, {}, {} ) );
+                 ReporterSpec( "someReporter"s, {}, {}, {}, {} ) );
         REQUIRE( parseReporterSpec( "otherReporter::Xk=v::out=c:\\blah" ) ==
                  ReporterSpec(
-                     "otherReporter"s, "c:\\blah"s, {}, { { "Xk"s, "v"s } } ) );
+                     "otherReporter"s, "c:\\blah"s, {}, {}, { { "Xk"s, "v"s } } ) );
         REQUIRE( parseReporterSpec( "diffReporter::Xk1=v1::Xk2==v2" ) ==
                  ReporterSpec( "diffReporter",
+                               {},
                                {},
                                {},
                                { { "Xk1"s, "v1"s }, { "Xk2"s, "=v2"s } } ) );
@@ -85,7 +100,15 @@ TEST_CASE("Parsing reporter specs", "[cli][reporter-spec][approvals]") {
                  ReporterSpec( "Foo:bar:reporter",
                                {},
                                Catch::ColourMode::ANSI,
+                               {},
                                { { "Xk 1"s, "v 1"s }, { "Xk2"s, "v:3"s } } ) );
+        REQUIRE(
+            parseReporterSpec( "my:reporter::X1=V1::verbosity=high::X2=V2" ) ==
+            ReporterSpec( "my:reporter",
+                          {},
+                          {},
+                          Catch::Verbosity::High,
+                          { { "X1"s, "V1"s }, { "X2"s, "V2"s } } ) );
     }
 
     SECTION( "Bad specs" ) {
@@ -107,5 +130,9 @@ TEST_CASE("Parsing reporter specs", "[cli][reporter-spec][approvals]") {
         REQUIRE_FALSE( parseReporterSpec( "reporter::Xa=" ) );
         // non-key value later field
         REQUIRE_FALSE( parseReporterSpec( "reporter::Xab" ) );
+        // Invalid verbosity value
+        REQUIRE_FALSE( parseReporterSpec( "reporter::verbosity=medium" ) );
+        // Duplicated verbosity
+        REQUIRE_FALSE( parseReporterSpec( "reporter::verbosity=high::X1=X2::verbosity=high" ) );
     }
 }

tests/SelfTest/IntrospectiveTests/InternalBenchmark.tests.cpp

@@ -429,9 +429,6 @@ TEST_CASE("run benchmark", "[benchmark][approvals]") {
 }
 
 TEST_CASE("Failing benchmarks", "[!benchmark][.approvals]") {
-    SECTION("empty", "Benchmark that has been optimized away (because it is empty)") {
-        BENCHMARK("Empty benchmark") {};
-    }
     SECTION("throw", "Benchmark that throws an exception") {
         BENCHMARK("Throwing benchmark") {
             throw "just a plain literal, bleh";

tests/SelfTest/IntrospectiveTests/Json.tests.cpp

@@ -7,11 +7,14 @@
 // SPDX-License-Identifier: BSL-1.0
 
 #include <catch2/catch_test_macros.hpp>
+#include <catch2/catch_template_test_macros.hpp>
 #include <catch2/benchmark/catch_benchmark.hpp>
 #include <catch2/generators/catch_generators.hpp>
 #include <catch2/internal/catch_jsonwriter.hpp>
 #include <catch2/matchers/catch_matchers_string.hpp>
 
+#include <limits>
+#include <locale>
 #include <sstream>
 
 namespace {
@@ -20,6 +23,27 @@ namespace {
         return os << "custom";
     }
 
+    // Obviously wrong numpunct if it is actually used by the JSON writer.
+    class TestNumpunct : public std::numpunct<char> {
+        char do_decimal_point() const override { return '?'; }
+        char do_thousands_sep() const override { return '!'; }
+        std::string do_grouping() const override { return "\1"; }
+        std::string do_truename() const override { return "real"; }
+        std::string do_falsename() const override { return "fake"; }
+    };
+
+    class LocaleGuard {
+        std::locale m_previous_locale;
+
+    public:
+        explicit LocaleGuard( std::locale const& locale ):
+            m_previous_locale{ std::locale() } {
+            std::locale::global( locale );
+        }
+
+        ~LocaleGuard() { std::locale::global( m_previous_locale ); }
+    };
+
 TEST_CASE( "JsonWriter", "[JSON][JsonWriter]" ) {
 
     std::stringstream stream;
@@ -152,6 +176,54 @@ TEST_CASE( "JsonWriter escapes characters in strings properly", "[JsonWriter]" )
     }
 }
 
+TEST_CASE( "JsonWriter serializes numbers independently of the global locale",
+           "[JsonWriter]" ) {
+    using Catch::Matchers::ContainsSubstring;
+
+    LocaleGuard locale_guard{ std::locale{ std::locale(), new TestNumpunct } };
+
+    std::stringstream sstream;
+    {
+        auto writer = Catch::JsonValueWriter{ sstream }.writeObject();
+        writer.write( "double" ).write( 1.5 );
+        writer.write( "int" ).write( 1234567 );
+        writer.write( "bool-1" ).write( true );
+        writer.write( "bool-2" ).write( false );
+        writer.write( "array" ).writeArray().write( 2.5 ).write( 1234567 );
+    }
+
+    REQUIRE_THAT( sstream.str(),
+                  ContainsSubstring( "\"double\": 1.5," ) &&
+                      ContainsSubstring( "\"int\": 1234567," ) &&
+                      ContainsSubstring( "\"bool-1\": true," ) &&
+                      ContainsSubstring( "\"bool-2\": false," ) &&
+                      ContainsSubstring(
+                          "\"array\": [\n    2.5,\n    1234567\n  ]\n}" ) );
+}
+
+TEMPLATE_TEST_CASE( "JsonWriter serializes non-finite FP using Python spelling",
+                    "[JsonWriter][floating-point]",
+                    float,
+                    double ) {
+    std::stringstream sstream;
+
+    SECTION( "NaN" ) {
+        Catch::JsonValueWriter{ sstream }.write(
+            std::numeric_limits<TestType>::quiet_NaN() );
+        REQUIRE( sstream.str() == "NaN" );
+    }
+    SECTION( "Pos nf" ) {
+        Catch::JsonValueWriter{ sstream }.write(
+            std::numeric_limits<TestType>::infinity() );
+        REQUIRE( sstream.str() == "Infinity" );
+    }
+    SECTION( "Neg inf" ) {
+        Catch::JsonValueWriter{ sstream }.write(
+            -std::numeric_limits<TestType>::infinity() );
+        REQUIRE( sstream.str() == "-Infinity" );
+    }
+}
+
 TEST_CASE( "JsonWriter benchmarks", "[JsonWriter][!benchmark]" ) {
     const auto input_length = GENERATE( as<size_t>{}, 10, 100, 10'000 );
     std::string test_input( input_length, 'a' );

tests/SelfTest/IntrospectiveTests/Reporters.tests.cpp

@@ -42,6 +42,7 @@ namespace {
             &config,
             Catch::Detail::make_unique<StringIStream>(),
             Catch::ColourMode::None,
+            Catch::Verbosity::Normal,
             {} };
     }
 }
@@ -114,7 +115,7 @@ TEST_CASE( "Reporter's write listings to provided stream", "[reporters]" ) {
         cfg_data.rngSeed = 1234;
         Catch::Config config( cfg_data );
         auto reporter = factory.second->create( Catch::ReporterConfig{
-            &config, CATCH_MOVE( sstream ), Catch::ColourMode::None, {} } );
+            &config, CATCH_MOVE( sstream ), Catch::ColourMode::None, Catch::Verbosity::Normal, {} } );
 
         DYNAMIC_SECTION( factory.first << " reporter lists tags" ) {
             std::vector<Catch::TagInfo> tags(1);

tests/TestScripts/DiscoverTests/CMakeLists.txt

@@ -15,6 +15,8 @@ if(CMAKE_VERSION GREATER_EQUAL 3.27)
 endif()
 catch_discover_tests(
   tests
+  TEST_PREFIX " prefix "
+  TEST_SUFFIX " suffix "
   ADD_TAGS_AS_LABELS
   DISCOVERY_MODE PRE_TEST
   ${extra_args}

tests/TestScripts/DiscoverTests/TestDecomposeJsonArray.cmake

@@ -0,0 +1,194 @@
+# SPDX-License-Identifier: BSL-1.0
+
+# Unit tests for `split_json_array` helper in `extras/CatchAddTests.cmake`.
+#
+# Yes, we are at the stage where the script helpers need unit tests.
+#
+# Run as
+#     cmake -DCATCH_ADD_TESTS_SCRIPT=/path/to/extras/CatchAddTests.cmake \
+#           -P TestDecomposeJsonArray.cmake
+
+
+cmake_minimum_required(VERSION 3.19)
+
+if(NOT DEFINED CATCH_ADD_TESTS_SCRIPT)
+  message(FATAL_ERROR "Missing argument `CATCH_ADD_TESTS_SCRIPT`")
+endif()
+
+if(NOT EXISTS "${CATCH_ADD_TESTS_SCRIPT}")
+  message(FATAL_ERROR "Cannot find CatchAddTests.cmake at '${CATCH_ADD_TESTS_SCRIPT}'")
+endif()
+
+# Pull in the helper functions. Without `TEST_EXECUTABLE` being defined,
+# `catch_discover_tests_impl` is not called.
+include("${CATCH_ADD_TESTS_SCRIPT}")
+
+set(_failures 0)
+
+# Parses out test names from provided listings and returns them through `out_var`.
+# Semicolons in test names are escaped as `@SEMI@`.
+function(decomposed_names listing_var out_var)
+  split_json_array(${listing_var} elements)
+  set(names "")
+  foreach(element IN LISTS elements)
+    magic_unescape_chars(element)
+    string(JSON name ERROR_VARIABLE err GET "${element}" "name")
+    if(NOT err STREQUAL "NOTFOUND")
+      set(${out_var} "PARSE-ERROR" PARENT_SCOPE)
+      return()
+    endif()
+    string(REPLACE ";" "@SEMI@" name "${name}")
+    list(APPEND names "${name}")
+  endforeach()
+  set(${out_var} "${names}" PARENT_SCOPE)
+endfunction()
+
+# Assert that decomposing the provided listing returns the expected list
+# of (test) names.
+# Semicolons inside expected names must be escaped as `@SEMI@`.
+function(expect_names description listing_var expected_names)
+  decomposed_names(${listing_var} actual_names)
+  if(actual_names STREQUAL expected_names)
+    message("  [PASS] ${description}")
+  else()
+    message("  [FAIL] ${description}")
+    message("         expected: ${expected_names}")
+    message("         actual:   ${actual_names}")
+    math(EXPR _n "${_failures} + 1")
+    set(_failures "${_n}" PARENT_SCOPE)
+  endif()
+endfunction()
+
+# Assert that the tags in one decomposed element are preserved exactly.
+# Semicolons in expected tags have to be escaped as `@SEMI@`.
+function(expect_tags description listing_var element_index expected_tags)
+  split_json_array(${listing_var} elements)
+  list(GET elements ${element_index} element)
+  magic_unescape_chars(element)
+
+  string(JSON tags ERROR_VARIABLE err GET "${element}" "tags")
+  if(NOT err STREQUAL "NOTFOUND")
+    set(actual_tags "PARSE-ERROR")
+  else()
+    string(JSON tag_count LENGTH "${tags}")
+    set(actual_tags "")
+    if(tag_count GREATER 0)
+      math(EXPR last_tag "${tag_count} - 1")
+      foreach(tag_index RANGE ${last_tag})
+        string(JSON tag GET "${tags}" ${tag_index})
+        string(REPLACE ";" "@SEMI@" tag "${tag}")
+        list(APPEND actual_tags "${tag}")
+      endforeach()
+    endif()
+  endif()
+
+  if(actual_tags STREQUAL expected_tags)
+    message("  [PASS] ${description}")
+  else()
+    message("  [FAIL] ${description}")
+    message("         expected: ${expected_tags}")
+    message("         actual:   ${actual_tags}")
+    math(EXPR _n "${_failures} + 1")
+    set(_failures "${_n}" PARENT_SCOPE)
+  endif()
+endfunction()
+
+# Convenience for building a minimal-but-realistic (pretty-printed) listing.
+function(make_listing out_var)
+  set(objects "")
+  foreach(name IN LISTS ARGN)
+    # Build each object by hand; the names passed in are already JSON-safe.
+    string(APPEND objects
+      "  {\n"
+      "    \"class-name\" : \"\",\n"
+      "    \"name\" : \"${name}\",\n"
+      "    \"tags\" : [ \"[tag]\" ]\n"
+      "  },\n")
+  endforeach()
+  string(REGEX REPLACE ",\n$" "\n" objects "${objects}")
+  set(${out_var} "[\n${objects}]" PARENT_SCOPE)
+endfunction()
+
+message(STATUS "Running split_json_array correctness tests")
+
+# There are 2 main difficulties in the array decomposition that we need
+# to check for:
+# 1) Names/tags that contain the expected element boundary (`}<ws>*,<ws>*{`)
+#    inside them, and thus are split into invalid JSON.
+# 2) Names/tags that contain CMake-relevant characters (e.g. semicolon,
+#    which is list separator) and thus cause issues when processing the
+#    string splits.
+
+make_listing(listing "")
+expect_names("No tests" listing "")
+
+make_listing(listing "plain")
+expect_names("Single test" listing "plain")
+
+make_listing(listing "n1" "n2" "n3")
+expect_names("Multiple tests" listing "n1;n2;n3")
+
+make_listing(listing "before },{ after" "second")
+expect_names("The element boundary in a test name" listing "before },{ after;second")
+
+make_listing(listing "},{" "next")
+expect_names("Test name is just the boundary" listing "},{;next")
+
+make_listing(listing "a},{b},{c" "x" "y},{z")
+expect_names("Test name has multiple boundaries" listing "a},{b},{c;x;y},{z")
+
+# Listings with semicolons have to be built by hand, or CMake would mess
+# them up before decomposition.
+set(listing "[{\"name\":\"has;semicolon\",\"tags\":[]},{\"name\":\"and;another;one\",\"tags\":[]}]")
+expect_names("Test names with semicolons" listing "has@SEMI@semicolon;and@SEMI@another@SEMI@one")
+
+set(listing "[{\"name\":\"C:\\\\path\\\\file\",\"tags\":[]},{\"name\":\"plain\",\"tags\":[]}]")
+expect_names("Test names with backslashes" listing "C:\\path\\file;plain")
+
+set(listing "[{\"name\":\"compact1\",\"tags\":[]},{\"name\":\"compact2\",\"tags\":[]}]")
+expect_names("compact json" listing "compact1;compact2")
+
+make_listing(listing "Then } , { we }\t,\t{ concatenate } , { them } ,{back},{" "second")
+expect_names("Whitespace around commas in test names survive split"
+  listing "Then } , { we }\t,\t{ concatenate } , { them } ,{back},{;second")
+
+make_listing(listing "}},{{" "second")
+expect_names("Doubled up boundary braces in names" listing "}},{{;second")
+
+# Square brackets and array likes in the test names.
+set(listing "[{\"name\":\"Arrays [{},{}] wheee\",\"tags\":[\"also},{tags\",\"tag;with;semicolons\"]},{\"name\":\"n\",\"tags\":[]}]")
+expect_names("array-like substring in name" listing "Arrays [{},{}] wheee;n")
+expect_tags("boundary-like and semicolon tags are preserved" listing 0
+  "also},{tags;tag@SEMI@with@SEMI@semicolons")
+expect_tags("empty tags are preserved" listing 1 "")
+
+# Listings with square brackets have to be built by hand, or CMake would
+# mess them up before decomposition.
+set(listing "[{\"name\":\"[\",\"tags\":[]},{\"name\":\"middle\",\"tags\":[]},{\"name\":\"]\",\"tags\":[]}]")
+expect_names("unmatched square brackets" listing "[;middle;]")
+
+set(listing "[{\"name\":\"a[b]c\",\"tags\":[]},{\"name\":\"[open\",\"tags\":[]},{\"name\":\"close]\",\"tags\":[]},{\"name\":\"[]\",\"tags\":[]}]")
+expect_names("Test names with mess of brackets" listing "a[b]c;[open;close];[]")
+
+# Without careful handling, these could be evaluated as variables.
+make_listing(listing
+  "curly \${NOT_A_VAR}"
+  "env \$ENV{HOME}"
+  "cache \$CACHE{FOO}"
+  "genex \$<CONFIG>"
+  "bare \$ and \$\$ and \${ unterminated")
+expect_names("Test names with dollars and various brackets (CMake vars)" listing
+  "curly \${NOT_A_VAR};env \$ENV{HOME};cache \$CACHE{FOO};genex \$<CONFIG>;bare \$ and \$\$ and \${ unterminated")
+
+# Listings with semicolons have to be built by hand, or CMake would mess
+# them up before decomposition.
+# This is just a huge mess of everything to see if anything shakes loose.
+set(listing "[{\"name\":\"\$ENV{X};[weird]{},{ mix \$<0:no> \${VAR} };,{ }},{{\",\"tags\":[]},{\"name\":\"after\",\"tags\":[]}]")
+expect_names("combined mega-case" listing
+  "\$ENV{X}@SEMI@[weird]{},{ mix \$<0:no> \${VAR} }@SEMI@,{ }},{{;after")
+
+if(_failures GREATER 0)
+  message(FATAL_ERROR "${_failures} decomposition test(s) failed")
+endif()
+
+message(STATUS "All split_json_array correctness tests passed")

tests/TestScripts/DiscoverTests/TestPrepareCommandFragment.cmake

@@ -0,0 +1,61 @@
+# SPDX-License-Identifier: BSL-1.0
+
+# Unit tests for `prepare_command_fragment` helper in `extras/CatchAddTests.cmake`.
+#
+# Yes, we are at the stage where the script helpers need unit tests.
+#
+# Run as
+#     cmake -DCATCH_ADD_TESTS_SCRIPT=/path/to/extras/CatchAddTests.cmake \
+#           -P TestPrepareCommandFragment.cmake
+
+
+cmake_minimum_required(VERSION 3.19)
+
+if(NOT DEFINED CATCH_ADD_TESTS_SCRIPT)
+  message(FATAL_ERROR "Missing argument `CATCH_ADD_TESTS_SCRIPT`")
+endif()
+
+if(NOT EXISTS "${CATCH_ADD_TESTS_SCRIPT}")
+  message(FATAL_ERROR "Cannot find CatchAddTests.cmake at '${CATCH_ADD_TESTS_SCRIPT}'")
+endif()
+
+# Pull in the helper functions. Without `TEST_EXECUTABLE` being defined,
+# `catch_discover_tests_impl` is not called.
+include("${CATCH_ADD_TESTS_SCRIPT}")
+
+set(_failures 0)
+
+function(expect_equal description actual expected)
+  if(actual STREQUAL expected)
+    message("  [PASS] ${description}")
+  else()
+    message("  [FAIL] ${description}")
+    message("         expected: [${expected}]")
+    message("         actual:   [${actual}]")
+    math(EXPR _n "${_failures} + 1")
+    set(_failures "${_n}" PARENT_SCOPE)
+  endif()
+endfunction()
+
+prepare_command_fragment(test_fragment SimpleName /path/to/tests)
+expect_equal("Simple arg, no quotes" "${test_fragment}" " SimpleName /path/to/tests")
+
+prepare_command_fragment(test_fragment "Name with spaces")
+expect_equal("Spaces in arg, needs quotes" "${test_fragment}" " [==[Name with spaces]==]")
+
+prepare_command_fragment(test_fragment Foo PROPERTIES LABELS "tagA\;tagB\;tagC")
+expect_equal("semicolons in argument are kept and quoted"
+  "${test_fragment}" " Foo PROPERTIES LABELS [==[tagA\;tagB\;tagC]==]")
+
+set(test_fragment "PRE-EXISTING")
+prepare_command_fragment(test_fragment Foo PROPERTIES BAR baz)
+expect_equal("out var does no accumulate commands"
+  "${test_fragment}" " Foo PROPERTIES BAR baz")
+
+
+
+if(_failures GREATER 0)
+  message(FATAL_ERROR "${_failures} prepare_command_fragment test(s) failed")
+else()
+  message(STATUS "All prepare_command_fragment tests passed")
+endif()

tests/TestScripts/DiscoverTests/VerifyRegistration.py

@@ -7,11 +7,13 @@
 
 # SPDX-License-Identifier: BSL-1.0
 
+import glob
 import os
 import subprocess
 import sys
 import re
 import json
+import tempfile
 from collections import namedtuple
 from typing import List
 
@@ -19,6 +21,11 @@ TestInfo = namedtuple('TestInfo', ['name', 'tags'])
 
 cmake_version_regex = re.compile(r'cmake version (\d+)\.(\d+)\.(\d+)')
 
+# Note that these both intentionally include preceding/trailing space,
+# which should not get stripped.
+CTEST_NAME_PREFIX = ' prefix '
+CTEST_NAME_SUFFIX = ' suffix '
+
 def get_cmake_version():
     result = subprocess.run(['cmake', '--version'],
                             capture_output = True,
@@ -64,7 +71,6 @@ def build_project(sources_dir, output_base_path, catch2_path):
     return build_dir
 
 
-
 def get_test_names(build_path: str) -> List[TestInfo]:
     # For now we assume that Windows builds are done using MSBuild under
     # Debug configuration. This means that we need to add "Debug" folder
@@ -72,16 +78,21 @@ def get_test_names(build_path: str) -> List[TestInfo]:
     config_path = "Debug" if os.name == 'nt' else ""
     full_path = os.path.join(build_path, config_path, 'tests')
 
+    with tempfile.TemporaryDirectory() as tmpdir:
+        fname = f'{tmpdir}/listing-output.json'
+        cmd = [full_path,
+          '--list-tests',
+          '--reporter', 'json',
+          '--out', fname
+        ]
+        result = subprocess.run(cmd,
+                                capture_output = False,
+                                check = True,
+                                text = True)
+        with open(fname, mode='r', encoding='utf-8') as file:
+            test_listing = json.load(file)
 
-    cmd = [full_path, '--reporter', 'json', '--list-tests']
-    result = subprocess.run(cmd,
-                            capture_output = True,
-                            check = True,
-                            text = True)
-
-    test_listing = json.loads(result.stdout)
-
-    assert test_listing['version'] == 1
+    assert test_listing['version'] == 2
 
     tests = []
     for test in test_listing['listings']['tests']:
@@ -91,15 +102,24 @@ def get_test_names(build_path: str) -> List[TestInfo]:
 
     return tests
 
+
 def get_ctest_listing(build_path):
     old_path = os.getcwd()
     os.chdir(build_path)
 
     cmd = ['ctest', '-C', 'debug', '--show-only=json-v1']
-    result = subprocess.run(cmd,
-                            capture_output = True,
-                            check = True,
-                            text = True)
+    try:
+        result = subprocess.run(cmd,
+                                capture_output = True,
+                                check = True,
+                                text = True)
+    except subprocess.CalledProcessError as err:
+        print('Error when getting output from CTest')
+        print(f'cmd: {err.cmd}')
+        print(f'stderr: {err.stderr}')
+        print(f'stdout: {err.stdout}')
+        exit(4)
+
     os.chdir(old_path)
     return result.stdout
 
@@ -123,6 +143,7 @@ def extract_tests_from_ctest(ctest_output) -> List[TestInfo]:
 
     return test_infos
 
+
 def check_DL_PATHS(ctest_output):
     ctest_response = json.loads(ctest_output)
     tests = ctest_response['tests']
@@ -132,6 +153,98 @@ def check_DL_PATHS(ctest_output):
             if property['name'] == 'ENVIRONMENT_MODIFICATION':
                 assert len(property['value']) == 2, f"The test provides 2 arguments to DL_PATHS, but instead found {len(property['value'])}"
 
+
+def add_test_list_extractor(build_path: str) -> str:
+    # The actual CTest script file has one of two names:
+    #   * `<target>-<short-hash>_tests.cmake` on single-config generators
+    #   * `<target>-<short-hash>_tests-<Config>.cmake` on multi-config generators
+    #
+    # We know the target name (`tests`), so we glob for the hash part
+    patterns = [
+        os.path.join(build_path, 'tests-*_tests.cmake'),
+        os.path.join(build_path, 'tests-*_tests-Debug.cmake'),
+    ]
+    matches = []
+    for pattern in patterns:
+        matches.extend(glob.glob(pattern))
+    if len(matches) != 1:
+        print(f"Found {len(matches)} CTest files in '{build_path}'. Expected only 1.")
+        exit(5)
+    test_script_file = matches[0]
+    basename = os.path.basename(test_script_file)
+    extractor_fname = os.path.join(build_path, 'extractor.cmake')
+    with open(extractor_fname, 'w') as f:
+        f.write(fr"""
+cmake_minimum_required(VERSION 3.19)
+
+cmake_policy(VERSION 3.19...4.4)
+
+# This dummies out the `add_test` and `set_tests_properties` commands
+# inside the CTest script, so we can include it during CMake script call.
+macro(add_test)
+endmacro()
+macro(set_tests_properties)
+endmacro()
+
+include(${{CMAKE_CURRENT_LIST_DIR}}/{basename})
+
+list(LENGTH tests_TESTS num_tests)
+message(STATUS "NUM TESTS: ${{num_tests}}")
+
+# '[' and ']' were escaped into ASCII 2 and 3 respectively, we have to
+# unescape them back here. Note that this has to be done per-element,
+# or CMake's list parsing breaks (which is why they were escaped).
+string(ASCII 2 _LeftBracketListingEscape)
+string(ASCII 3 _RightBracketListingEscape)
+
+foreach(test IN LISTS tests_TESTS)
+  string(REPLACE "${{_LeftBracketListingEscape}}" "[" test "${{test}}")
+  string(REPLACE "${{_RightBracketListingEscape}}" "]" test "${{test}}")
+  string(REPLACE "\\" "\\\\" test "${{test}}")
+  string(REPLACE "\r" "\\r" test "${{test}}")
+  string(REPLACE "\n" "\\n" test "${{test}}")
+  message(STATUS "TEST_NAME: ${{test}}")
+endforeach()
+""")
+    return extractor_fname
+
+
+def extract_tests_list_from_ctest_script(build_path: str) -> List[str]:
+    extractor = add_test_list_extractor(build_path)
+
+    cmd = ['cmake', '-P', extractor]
+
+    try:
+        result = subprocess.run(cmd,
+                                capture_output = True,
+                                check = True,
+                                text = True)
+    except subprocess.CalledProcessError as err:
+        print('Error when calling CTest test extractor')
+        print(f'cmd: {err.cmd}')
+        print(f'stderr: {err.stderr}')
+        print(f'stdout: {err.stdout}')
+        exit(4)
+
+    lines = [x for x in result.stdout.split('\n') if x.strip()]
+    test_num_line = lines[0]
+    test_lines = lines[1:]
+
+    test_num_prefix = '-- NUM TESTS: '
+    assert test_num_prefix in test_num_line, test_num_line
+    test_num_line = test_num_line[len(test_num_prefix):]
+    num_tests = int(test_num_line)
+
+    assert num_tests == len(test_lines), len(test_lines)
+    test_name_prefix = '-- TEST_NAME: '
+    assert all(test_name_prefix in x for x in test_lines)
+    test_names = [x[len(test_name_prefix):] for x in test_lines]
+
+    # Unescape the names, so that names with literal newlines have newlines in them again
+    test_names = [x.encode('utf-8').decode('unicode-escape') for x in test_names]
+    return test_names
+
+
 def escape_catch2_test_names(infos: List[TestInfo]):
     escaped = []
     for info in infos:
@@ -141,6 +254,7 @@ def escape_catch2_test_names(infos: List[TestInfo]):
       escaped.append(TestInfo(name, info.tags))
     return escaped
 
+
 if __name__ == '__main__':
     if len(sys.argv) != 3:
         print(f'Usage: {sys.argv[0]} path-to-catch2-cml output-path')
@@ -151,7 +265,8 @@ if __name__ == '__main__':
 
     build_path = build_project(sources_dir, output_base_path, catch2_path)
 
-    catch_test_names = escape_catch2_test_names(get_test_names(build_path))
+    raw_catch_test_names = get_test_names(build_path)
+    catch_test_names = escape_catch2_test_names(raw_catch_test_names)
     ctest_output = get_ctest_listing(build_path)
     ctest_test_names = extract_tests_from_ctest(ctest_output)
 
@@ -168,7 +283,20 @@ if __name__ == '__main__':
     if mismatched:
         print(f"Found {mismatched} mismatched tests catch test names and ctest test commands!")
         exit(1)
-    print(f"{len(catch_test_names)} tests matched")
+    print(f"{len(catch_test_names)} tests matched in CTest listing")
+
+    test_list_names = sorted(extract_tests_list_from_ctest_script(build_path))
+    expected_names = sorted(CTEST_NAME_PREFIX + info.name + CTEST_NAME_SUFFIX for info in raw_catch_test_names)
+    if test_list_names != expected_names:
+        print("TEST_LIST variable (tests_TESTS) does not match Catch2 test listing!")
+        for name in test_list_names:
+            if name not in expected_names:
+                print(f"  TEST_LIST name '{name}' not in Catch2 listing")
+        for name in expected_names:
+            if name not in test_list_names:
+                print(f"  Catch2 name '{name}' not in TEST_LIST")
+        exit(1)
+    print(f"{len(test_list_names)} tests matched in TEST_LIST variable")
 
     cmake_version = get_cmake_version()
     if cmake_version >= (3, 27):

tests/TestScripts/DiscoverTests/register-tests.cpp

@@ -8,6 +8,24 @@
 
 #include <catch2/catch_test_macros.hpp>
 
+#include <cstdio>
+#include <iostream>
+
+namespace {
+
+struct PrintsWhenConstructed {
+    PrintsWhenConstructed() {
+        std::cout << "Hello\n";
+        std::cerr << "Holla\n";
+        std::fprintf(stdout, "Hullo\n");
+        std::fprintf(stderr, "Hillo\n");
+    }
+};
+
+static PrintsWhenConstructed instance;
+
+}
+
 TEST_CASE("@Script[C:\\EPM1A]=x;\"SCALA_ZERO:\"", "[script regressions]"){}
 TEST_CASE("Some test") {}
 TEST_CASE( "Let's have a test case with a long name. Longer. No, even longer. "
@@ -21,3 +39,30 @@ public:
 };
 
 TEST_CASE_METHOD(TestCaseFixture, "A test case as method", "[tagstagstags]") {}
+
+TEST_CASE("Unclosed right ) parenthesis") {}
+TEST_CASE("Unclosed left ( parenthesis") {}
+
+TEST_CASE( "Newlines\nAnd\rOther\n\tWhitespace", "[whitespace-going-wild]" ) {}
+TEST_CASE( "Escaped \\n newline and \\r other whitespace", "[whitespace-going-wild]") {}
+
+// Some JSON-like and JSON-adjacent characters and substrings in the test names/tags
+// This serves to test that the parse-json-via-string-splitting hack in
+// catch_discover_tests works properly.
+TEST_CASE( "We split on variants of },{ in name" ) {}
+TEST_CASE( "Then }\t, { we }\t,\t{ concatenate } , { them } ,{back},{" ) {}
+TEST_CASE( "}},{{" ) {}
+TEST_CASE( "Arrays [{},{}] wheee", "[also},{tags]" ) {}
+TEST_CASE( "Let's add semicolon into the mix ;},{;},{};,{}" ) {}
+TEST_CASE( "[", "[unmatched-square-bracket]" ) {}
+TEST_CASE( "]", "[unmatched-square-bracket]" ) {}
+
+// Some CMake-like special strings ($ as dereference) strings in test names.
+// This serves to test that the names of test cases are not evaluated
+// inside the catch_discover_tests.
+TEST_CASE( "Plain ${NOT_A_VAR} variable" ) {}
+TEST_CASE( "Env variable access $ENV{HOME}" ) {}
+TEST_CASE( "Cache check $CACHE{FOO}" ) {}
+TEST_CASE( "Also some generator exprs $<CONFIG> in $<1:yes> name" ) {}
+TEST_CASE( "Mess of bare $ $$ $$$ and unterminated $} ${ exprs" ) {}
+TEST_CASE( "$ENV{X};[weird]{},{ mix $<0:no> ${VAR} };,{ }},{{" ) {}