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catch_discover_tests uses tempfile to retrieve JSON from the binary

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This allows it to deal with badly behaved code, where 3rd party
dependencies write into stdout during global construction.

Closes #3162
Closes #3166
This commit is contained in:
Martin Hořeňovský
2026-07-04 16:36:05 +02:00
parent 675f9eaeb1
commit 9ec44dd62b
4 changed files with 92 additions and 15 deletions
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extras/Catch.cmake
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@@ -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
@@ -67,7 +67,7 @@ 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.