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758c05ea15064dab6a89118fcdf7bde32399a880
mp-units/test/unit_test/runtime/fmt_test.cpp
Mateusz Pusz 758c05ea15 quantity_cast fmt tests added
2019-12-23 13:22:37 +01:00

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// The MIT License (MIT)
//
// Copyright (c) 2018 Mateusz Pusz
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
#include "units/physical/si/area.h"
#include "units/physical/si/frequency.h"
#include "units/physical/si/power.h"
#include "units/physical/si/pressure.h"
#include "units/physical/si/velocity.h"
#include "units/physical/si/volume.h"
#include "units/physical/si/surface_tension.h"
#include "units/format.h"
#include "units/math.h"
#include <catch2/catch.hpp>
#include <sstream>
using namespace units;
using namespace units::si;
using namespace Catch::Matchers;
TEST_CASE("operator<< on a quantity", "[text][ostream][fmt]")
{
std::stringstream stream;
SECTION("quantity with a predefined unit")
{
SECTION("integral representation")
{
const auto q = 60W;
stream << q;
SECTION("iostream")
{
CHECK(stream.str() == "60 W");
}
SECTION("fmt with default format {} on a quantity")
{
CHECK(fmt::format("{}", q) == stream.str());
}
SECTION("fmt with format {:%Q %q} on a quantity")
{
CHECK(fmt::format("{:%Q %q}", q) == stream.str());
}
}
SECTION("floating-point representation")
{
const auto q = 1023.5Pa;
stream << q;
SECTION("iostream")
{
CHECK(stream.str() == "1023.5 Pa");
}
SECTION("fmt with default format {} on a quantity")
{
CHECK(fmt::format("{}", q) == stream.str());
}
SECTION("fmt with format {:%Q %q} on a quantity")
{
CHECK(fmt::format("{:%Q %q}", q) == stream.str());
}
}
}
SECTION("quantity with a predefined prefixed unit")
{
const auto q = 125us;
stream << q;
SECTION("iostream")
{
CHECK(stream.str() == "125 µs");
}
SECTION("fmt with default format {} on a quantity")
{
CHECK(fmt::format("{}", q) == stream.str());
}
SECTION("fmt with format {:%Q %q} on a quantity")
{
CHECK(fmt::format("{:%Q %q}", q) == stream.str());
}
}
SECTION("quantity with a predefined unit + prefix")
{
SECTION("in terms of base units")
{
const length<scaled_unit<ratio<1'000'000>, metre>> q(123);
stream << q;
SECTION("iostream")
{
CHECK(stream.str() == "123 Mm");
}
SECTION("fmt with default format {} on a quantity")
{
CHECK(fmt::format("{}", q) == stream.str());
}
SECTION("fmt with format {:%Q %q} on a quantity")
{
CHECK(fmt::format("{:%Q %q}", q) == stream.str());
}
}
SECTION("in terms of derived units")
{
const energy<scaled_unit<ratio<1, 100>, joule>> q(60);
stream << q;
SECTION("iostream")
{
CHECK(stream.str() == "60 cJ");
}
SECTION("fmt with default format {} on a quantity")
{
CHECK(fmt::format("{}", q) == stream.str());
}
SECTION("fmt with format {:%Q %q} on a quantity")
{
CHECK(fmt::format("{:%Q %q}", q) == stream.str());
}
}
}
SECTION("quantity with a deduced unit")
{
SECTION("coherent derived unit")
{
SECTION("acceleration")
{
const auto q = 20.m / 2s / 1s;
stream << q;
SECTION("iostream")
{
CHECK(stream.str() == "10 m/s²");
}
SECTION("fmt with default format {} on a quantity")
{
CHECK(fmt::format("{}", q) == stream.str());
}
SECTION("fmt with format {:%Q %q} on a quantity")
{
CHECK(fmt::format("{:%Q %q}", q) == stream.str());
}
}
SECTION("volume")
{
const auto q = 2m * 1m * 1m;
stream << q;
SECTION("iostream")
{
CHECK(stream.str() == "2 m³");
}
SECTION("fmt with default format {} on a quantity")
{
CHECK(fmt::format("{}", q) == stream.str());
}
SECTION("fmt with format {:%Q %q} on a quantity")
{
CHECK(fmt::format("{:%Q %q}", q) == stream.str());
}
}
SECTION("surface tension")
{
const auto q = 20.N / 2m;
stream << q;
SECTION("iostream")
{
CHECK(stream.str() == "10 N/m");
}
SECTION("fmt with default format {} on a quantity")
{
CHECK(fmt::format("{}", q) == stream.str());
}
SECTION("fmt with format {:%Q %q} on a quantity")
{
CHECK(fmt::format("{:%Q %q}", q) == stream.str());
}
}
}
SECTION("deduced derived unit")
{
SECTION("velocity")
{
const auto q = 20.km / 2h;
stream << q;
SECTION("iostream")
{
CHECK(stream.str() == "10 km/h");
}
SECTION("fmt with default format {} on a quantity")
{
CHECK(fmt::format("{}", q) == stream.str());
}
SECTION("fmt with format {:%Q %q} on a quantity")
{
CHECK(fmt::format("{:%Q %q}", q) == stream.str());
}
}
SECTION("surface tension")
{
struct newton_per_centimetre : deduced_unit<newton_per_centimetre, dim_surface_tension, newton, centimetre> {};
const surface_tension<newton_per_centimetre> q(123);
stream << q;
SECTION("iostream")
{
CHECK(stream.str() == "123 N/cm");
}
SECTION("fmt with default format {} on a quantity")
{
CHECK(fmt::format("{}", q) == stream.str());
}
SECTION("fmt with format {:%Q %q} on a quantity")
{
CHECK(fmt::format("{:%Q %q}", q) == stream.str());
}
}
}
}
SECTION("quantity with a predefined dimension but unknown unit")
{
SECTION("unit::ratio as an SI prefix for a dimension with a special symbol")
{
const auto q = 4.N * 2cm;
stream << q;
SECTION("iostream")
{
CHECK(stream.str() == "8 cJ");
}
SECTION("fmt with default format {} on a quantity")
{
CHECK(fmt::format("{}", q) == stream.str());
}
SECTION("fmt with format {:%Q %q} on a quantity")
{
CHECK(fmt::format("{:%Q %q}", q) == stream.str());
}
}
SECTION("unit::ratio for a dimension without a special symbol")
{
const auto q = 2.cm * 2m * 2m;
stream << q;
SECTION("iostream")
{
CHECK(stream.str() == "8 [1/100]m³");
}
SECTION("fmt with default format {} on a quantity")
{
CHECK(fmt::format("{}", q) == stream.str());
}
SECTION("fmt with format {:%Q %q} on a quantity")
{
CHECK(fmt::format("{:%Q %q}", q) == stream.str());
}
}
SECTION("unit::ratio::num != 1 && unit::ratio::den == 1")
{
const auto q = 4 * 2min / (2s * 2s);
stream << q;
SECTION("iostream")
{
CHECK(stream.str() == "2 [60]Hz");
}
SECTION("fmt with default format {} on a quantity")
{
CHECK(fmt::format("{}", q) == stream.str());
}
SECTION("fmt with format {:%Q %q} on a quantity")
{
CHECK(fmt::format("{:%Q %q}", q) == stream.str());
}
}
SECTION("unit::ratio::num == 1 && unit::ratio::den != 1")
{
const auto q = 20._J / 2min;
stream << q;
SECTION("iostream")
{
CHECK(stream.str() == "10 [1/60]W");
}
SECTION("fmt with default format {} on a quantity")
{
CHECK(fmt::format("{}", q) == stream.str());
}
SECTION("fmt with format {:%Q %q} on a quantity")
{
CHECK(fmt::format("{:%Q %q}", q) == stream.str());
}
}
SECTION("unit::ratio::num != 1 && unit::ratio::den != 1")
{
const auto q = 60.kJ / 2min;
stream << q;
SECTION("iostream")
{
CHECK(stream.str() == "30 [50/3]W");
}
SECTION("fmt with default format {} on a quantity")
{
CHECK(fmt::format("{}", q) == stream.str());
}
SECTION("fmt with format {:%Q %q} on a quantity")
{
CHECK(fmt::format("{:%Q %q}", q) == stream.str());
}
}
}
SECTION("quantity with an unkown dimension")
{
SECTION("unit::ratio::num == 1 && unit::ratio::den == 1")
{
const auto q = 2s * 2m * 2kg;
stream << q;
SECTION("iostream")
{
CHECK(stream.str() == "8 m⋅kg⋅s");
}
SECTION("fmt with default format {} on a quantity")
{
CHECK(fmt::format("{}", q) == stream.str());
}
SECTION("fmt with format {:%Q %q} on a quantity")
{
CHECK(fmt::format("{:%Q %q}", q) == stream.str());
}
}
SECTION("unit::ratio as an SI prefix")
{
const auto q = 4km * 2s;
stream << q;
SECTION("iostream")
{
CHECK(stream.str() == "8 [1000]m⋅s");
}
SECTION("fmt with default format {} on a quantity")
{
CHECK(fmt::format("{}", q) == stream.str());
}
SECTION("fmt with format {:%Q %q} on a quantity")
{
CHECK(fmt::format("{:%Q %q}", q) == stream.str());
}
}
SECTION("unit::ratio::num != 1 && unit::ratio::den == 1")
{
const auto q = 4kg * 2min / (2s * 2s);
stream << q;
SECTION("iostream")
{
CHECK(stream.str() == "2 [60]kg/s");
}
SECTION("fmt with default format {} on a quantity")
{
CHECK(fmt::format("{}", q) == stream.str());
}
SECTION("fmt with format {:%Q %q} on a quantity")
{
CHECK(fmt::format("{:%Q %q}", q) == stream.str());
}
}
SECTION("unit::ratio::num == 1 && unit::ratio::den != 1")
{
const auto q = 20.kg / 2min;
stream << q;
SECTION("iostream")
{
CHECK(stream.str() == "10 [1/60]kg/s");
}
SECTION("fmt with default format {} on a quantity")
{
CHECK(fmt::format("{}", q) == stream.str());
}
SECTION("fmt with format {:%Q %q} on a quantity")
{
CHECK(fmt::format("{:%Q %q}", q) == stream.str());
}
}
SECTION("unit::ratio::num != 1 && unit::ratio::den != 1")
{
const auto q = 60.min / 2km;
stream << q;
SECTION("iostream")
{
CHECK(stream.str() == "30 [3/50]1/m⋅s");
}
SECTION("fmt with default format {} on a quantity")
{
CHECK(fmt::format("{}", q) == stream.str());
}
SECTION("fmt with format {:%Q %q} on a quantity")
{
CHECK(fmt::format("{:%Q %q}", q) == stream.str());
}
}
SECTION("exp::num == 1 && exp::den == 1")
{
const auto q = 4m * 2s;
stream << q;
SECTION("iostream")
{
CHECK(stream.str() == "8 m⋅s");
}
SECTION("fmt with default format {} on a quantity")
{
CHECK(fmt::format("{}", q) == stream.str());
}
SECTION("fmt with format {:%Q %q} on a quantity")
{
CHECK(fmt::format("{:%Q %q}", q) == stream.str());
}
}
SECTION("exp::num == 2 && exp::den == 1 for positive exponent")
{
const auto q = 4m * 2s * 2s;
stream << q;
SECTION("iostream")
{
CHECK(stream.str() == "16 m⋅s²");
}
SECTION("fmt with default format {} on a quantity")
{
CHECK(fmt::format("{}", q) == stream.str());
}
SECTION("fmt with format {:%Q %q} on a quantity")
{
CHECK(fmt::format("{:%Q %q}", q) == stream.str());
}
}
SECTION("exp::num == 2 && exp::den == 1 for negative exponent (first dimension)")
{
const auto q = 8.s / 2m / 2m;
stream << q;
SECTION("iostream")
{
CHECK(stream.str() == "2 1/m²⋅s");
}
SECTION("fmt with default format {} on a quantity")
{
CHECK(fmt::format("{}", q) == stream.str());
}
SECTION("fmt with format {:%Q %q} on a quantity")
{
CHECK(fmt::format("{:%Q %q}", q) == stream.str());
}
}
SECTION("exp::num == 2 && exp::den == 1 for negative exponent (not first dimension)")
{
const auto q = 8.m / 2kg / 2kg;
stream << q;
SECTION("iostream")
{
CHECK(stream.str() == "2 m/kg²");
}
SECTION("fmt with default format {} on a quantity")
{
CHECK(fmt::format("{}", q) == stream.str());
}
SECTION("fmt with format {:%Q %q} on a quantity")
{
CHECK(fmt::format("{:%Q %q}", q) == stream.str());
}
}
SECTION("fractional positive exponent")
{
const auto q = sqrt(9.m);
stream << q;
SECTION("iostream")
{
CHECK(stream.str() == "3 m^(1/2)");
}
SECTION("fmt with default format {} on a quantity")
{
CHECK(fmt::format("{}", q) == stream.str());
}
SECTION("fmt with format {:%Q %q} on a quantity")
{
CHECK(fmt::format("{:%Q %q}", q) == stream.str());
}
}
SECTION("fractional negative exponent")
{
const auto q = sqrt(9 / 1.m);
stream << q;
SECTION("iostream")
{
CHECK(stream.str() == "3 1/m^(1/2)");
}
SECTION("fmt with default format {} on a quantity")
{
CHECK(fmt::format("{}", q) == stream.str());
}
SECTION("fmt with format {:%Q %q} on a quantity")
{
CHECK(fmt::format("{:%Q %q}", q) == stream.str());
}
}
}
}
TEST_CASE("format string with only %Q should print quantity value only", "[text][fmt]")
{
SECTION("integral representation")
{
SECTION("positive value")
{
CHECK(fmt::format("{:%Q}", 123kmph) == "123");
}
SECTION("negative value")
{
CHECK(fmt::format("{:%Q}", 5m - 10m) == "-5");
}
}
SECTION("floating-point representation")
{
SECTION("positive value")
{
CHECK(fmt::format("{:%Q}", 221.km / 2h) == "110.5");
}
SECTION("negative value")
{
CHECK(fmt::format("{:%Q}", 3.14m - 10m) == "-6.86");
}
SECTION("nan")
{
CHECK(fmt::format("{:%Q}", length<metre>(std::numeric_limits<double>::quiet_NaN())) == "nan");
}
SECTION("inf")
{
CHECK(fmt::format("{:%Q}", length<metre>(std::numeric_limits<double>::infinity())) == "inf");
}
SECTION("-inf")
{
CHECK(fmt::format("{:%Q}", length<metre>(-std::numeric_limits<double>::infinity())) == "-inf");
}
}
}
TEST_CASE("format string with only %q should print quantity unit symbol only", "[text][fmt]")
{
CHECK(fmt::format("{:%q}", 123kmph) == "km/h");
}
TEST_CASE("%q an %Q can be put anywhere in a format string", "[text][fmt]")
{
SECTION("no space")
{
CHECK(fmt::format("{:%Q%q}", 123kmph) == "123km/h");
}
SECTION("separator")
{
CHECK(fmt::format("{:%Q###%q}", 123kmph) == "123###km/h");
}
SECTION("opposite order")
{
CHECK(fmt::format("{:%q %Q}", 123kmph) == "km/h 123");
}
SECTION("tabulator")
{
CHECK(fmt::format("{:%Q%t%q}", 123kmph) == "123\tkm/h");
}
SECTION("new line")
{
CHECK(fmt::format("{:%Q%n%q}", 123kmph) == "123\nkm/h");
}
SECTION("% sign")
{
CHECK(fmt::format("{:%Q%% %q}", 123kmph) == "123% km/h");
}
}
TEST_CASE("fill and align specification", "[text][fmt]")
{
SECTION("default format {} on a quantity")
{
CHECK(fmt::format("|{:0}|", 123m) == "|123 m|");
CHECK(fmt::format("|{:10}|", 123m) == "| 123 m|");
CHECK(fmt::format("|{:<10}|", 123m) == "|123 m |");
CHECK(fmt::format("|{:>10}|", 123m) == "| 123 m|");
CHECK(fmt::format("|{:^10}|", 123m) == "| 123 m |");
CHECK(fmt::format("|{:*<10}|", 123m) == "|123 m*****|");
CHECK(fmt::format("|{:*>10}|", 123m) == "|*****123 m|");
CHECK(fmt::format("|{:*^10}|", 123m) == "|**123 m***|");
}
SECTION("full format {:%Q %q} on a quantity")
{
CHECK(fmt::format("|{:0%Q%q}|", 123m) == "|123m|");
CHECK(fmt::format("|{:10%Q%q}|", 123m) == "| 123m|");
CHECK(fmt::format("|{:<10%Q%q}|", 123m) == "|123m |");
CHECK(fmt::format("|{:>10%Q%q}|", 123m) == "| 123m|");
CHECK(fmt::format("|{:^10%Q%q}|", 123m) == "| 123m |");
CHECK(fmt::format("|{:*<10%Q%q}|", 123m) == "|123m******|");
CHECK(fmt::format("|{:*>10%Q%q}|", 123m) == "|******123m|");
CHECK(fmt::format("|{:*^10%Q%q}|", 123m) == "|***123m***|");
}
SECTION("value only format {:%Q} on a quantity")
{
CHECK(fmt::format("|{:0%Q}|", 123m) == "|123|");
CHECK(fmt::format("|{:10%Q}|", 123m) == "| 123|");
CHECK(fmt::format("|{:<10%Q}|", 123m) == "|123 |");
CHECK(fmt::format("|{:>10%Q}|", 123m) == "| 123|");
CHECK(fmt::format("|{:^10%Q}|", 123m) == "| 123 |");
CHECK(fmt::format("|{:*<10%Q}|", 123m) == "|123*******|");
CHECK(fmt::format("|{:*>10%Q}|", 123m) == "|*******123|");
CHECK(fmt::format("|{:*^10%Q}|", 123m) == "|***123****|");
}
SECTION("symbol only format {:%q} on a quantity")
{
CHECK(fmt::format("|{:0%q}|", 123m) == "|m|");
CHECK(fmt::format("|{:10%q}|", 123m) == "|m |");
CHECK(fmt::format("|{:<10%q}|", 123m) == "|m |");
CHECK(fmt::format("|{:>10%q}|", 123m) == "| m|");
CHECK(fmt::format("|{:^10%q}|", 123m) == "| m |");
CHECK(fmt::format("|{:*<10%q}|", 123m) == "|m*********|");
CHECK(fmt::format("|{:*>10%q}|", 123m) == "|*********m|");
CHECK(fmt::format("|{:*^10%q}|", 123m) == "|****m*****|");
}
}
TEST_CASE("sign specification", "[text][fmt]")
{
length<metre> inf(std::numeric_limits<double>::infinity());
length<metre> nan(std::numeric_limits<double>::quiet_NaN());
SECTION("default format {} on a quantity")
{
CHECK(fmt::format("{0:},{0:+},{0:-},{0: }", 1m) == "1 m,+1 m,1 m, 1 m");
CHECK(fmt::format("{0:},{0:+},{0:-},{0: }", -1m) == "-1 m,-1 m,-1 m,-1 m");
CHECK(fmt::format("{0:},{0:+},{0:-},{0: }", inf) == "inf m,+inf m,inf m, inf m");
CHECK(fmt::format("{0:},{0:+},{0:-},{0: }", nan) == "nan m,+nan m,nan m, nan m");
}
SECTION("full format {:%Q %q} on a quantity")
{
CHECK(fmt::format("{0:%Q%q},{0:+%Q%q},{0:-%Q%q},{0: %Q%q}", 1m) == "1m,+1m,1m, 1m");
CHECK(fmt::format("{0:%Q%q},{0:+%Q%q},{0:-%Q%q},{0: %Q%q}", -1m) == "-1m,-1m,-1m,-1m");
CHECK(fmt::format("{0:%Q%q},{0:+%Q%q},{0:-%Q%q},{0: %Q%q}", inf) == "infm,+infm,infm, infm");
CHECK(fmt::format("{0:%Q%q},{0:+%Q%q},{0:-%Q%q},{0: %Q%q}", nan) == "nanm,+nanm,nanm, nanm");
}
SECTION("value only format {:%Q} on a quantity")
{
CHECK(fmt::format("{0:%Q},{0:+%Q},{0:-%Q},{0: %Q}", 1m) == "1,+1,1, 1");
CHECK(fmt::format("{0:%Q},{0:+%Q},{0:-%Q},{0: %Q}", -1m) == "-1,-1,-1,-1");
CHECK(fmt::format("{0:%Q},{0:+%Q},{0:-%Q},{0: %Q}", inf) == "inf,+inf,inf, inf");
CHECK(fmt::format("{0:%Q},{0:+%Q},{0:-%Q},{0: %Q}", nan) == "nan,+nan,nan, nan");
}
}
TEST_CASE("sign specification for unit only", "[text][fmt][exception]")
{
CHECK_THROWS_MATCHES(fmt::format("{:+%q}", 1m), fmt::format_error, Message("sign not allowed for a quantity unit"));
CHECK_THROWS_MATCHES(fmt::format("{:-%q}", 1m), fmt::format_error, Message("sign not allowed for a quantity unit"));
}
TEST_CASE("precision specification", "[text][fmt]")
{
SECTION("default format {} on a quantity")
{
CHECK(fmt::format("{:.1}", 1.2345m) == "1.2 m");
CHECK(fmt::format("{:.0}", 1.2345m) == "1 m");
CHECK(fmt::format("{:.2}", 1.2345m) == "1.23 m");
CHECK(fmt::format("{:.3}", 1.2345m) == "1.235 m");
CHECK(fmt::format("{:.4}", 1.2345m) == "1.2345 m");
CHECK(fmt::format("{:.5}", 1.2345m) == "1.23450 m");
CHECK(fmt::format("{:.10}", 1.2345m) == "1.2345000000 m");
}
SECTION("full format {:%Q %q} on a quantity")
{
CHECK(fmt::format("{:.0%Q %q}", 1.2345m) == "1 m");
CHECK(fmt::format("{:.1%Q %q}", 1.2345m) == "1.2 m");
CHECK(fmt::format("{:.2%Q %q}", 1.2345m) == "1.23 m");
CHECK(fmt::format("{:.3%Q %q}", 1.2345m) == "1.235 m");
CHECK(fmt::format("{:.4%Q %q}", 1.2345m) == "1.2345 m");
CHECK(fmt::format("{:.5%Q %q}", 1.2345m) == "1.23450 m");
CHECK(fmt::format("{:.10%Q %q}", 1.2345m) == "1.2345000000 m");
}
SECTION("value only format {:%Q} on a quantity")
{
CHECK(fmt::format("{:.0%Q}", 1.2345m) == "1");
CHECK(fmt::format("{:.1%Q}", 1.2345m) == "1.2");
CHECK(fmt::format("{:.2%Q}", 1.2345m) == "1.23");
CHECK(fmt::format("{:.3%Q}", 1.2345m) == "1.235");
CHECK(fmt::format("{:.4%Q}", 1.2345m) == "1.2345");
CHECK(fmt::format("{:.5%Q}", 1.2345m) == "1.23450");
CHECK(fmt::format("{:.10%Q}", 1.2345m) == "1.2345000000");
}
}
TEST_CASE("precision specification for integral representation should throw", "[text][fmt][exception]")
{
SECTION("default format {} on a quantity")
{
REQUIRE_THROWS_MATCHES(fmt::format("{:.1}", 1m), fmt::format_error, Message("precision not allowed for integral quantity representation"));
}
SECTION("full format {:%Q %q} on a quantity")
{
REQUIRE_THROWS_MATCHES(fmt::format("{:.1%Q %q}", 1m), fmt::format_error, Message("precision not allowed for integral quantity representation"));
}
SECTION("value only format {:%Q} on a quantity")
{
REQUIRE_THROWS_MATCHES(fmt::format("{:.1%Q}", 1m), fmt::format_error, Message("precision not allowed for integral quantity representation"));
}
}
// Restate operator<< definitions in terms of std::format to make I/O manipulators apply to whole objects
// rather than their parts
TEST_CASE("quantity_cast", "[text][ostream]")
{
std::stringstream stream;
SECTION("int to double representation")
{
const auto q = 121km / 2h;
SECTION("original")
{
stream << q;
CHECK(stream.str() == "60 km/h");
}
SECTION("int")
{
stream << quantity_cast<int>(q);
CHECK(stream.str() == "60 km/h");
}
SECTION("double")
{
stream << quantity_cast<double>(q);
CHECK(stream.str() == "60 km/h");
}
}
SECTION("double to int representation")
{
const auto q = 121.km / 2h;
SECTION("original")
{
stream << q;
CHECK(stream.str() == "60.5 km/h");
}
SECTION("int")
{
stream << quantity_cast<int>(q);
CHECK(stream.str() == "60 km/h");
}
SECTION("double")
{
stream << quantity_cast<double>(q);
CHECK(stream.str() == "60.5 km/h");
}
}
}
// Giving a precision specification
// in the chrono-format-spec is valid only for std::chrono::duration types where the representation type Rep
// is a floating-point type. For all other Rep types, a format_error shall be thrown if the chrono-format-spec
// contains a precision specification.
// string s = format("{:=>8}", 42ms); // value of s is "====42ms"
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