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Refactor custom precision in floating point stringification

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Also fixup tests.
This commit is contained in:
Martin Hořeňovský
2019-05-02 21:32:54 +02:00
parent 53a83e855e
commit 1161011dd0
8 changed files with 127 additions and 57 deletions
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55
projects/SelfTest/UsageTests/ToStringGeneral.tests.cpp
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@@ -128,28 +128,39 @@ TEST_CASE("String views are stringified like other strings", "[toString][approva
#endif
//TEMPLATE_TEST_CASE("Floating-point precision can be set", "[toString][floatingPoint]", float, double)
//{
// const auto oldPrecision = Catch::StringMaker<TestType>::getPrecision();
// const auto precision = GENERATE(-1, 0, 3, std::numeric_limits<TestType>::max_digits10);
// const auto expectedLength = unsigned(precision < 0 ? 3 : precision);
//
// CAPTURE( precision );
//
// if (precision >= 0)
// {
// Catch::StringMaker<TestType>::setPrecision(precision);
// }
//
// // Expected to fail to demonstrate the problem
// const auto str = Catch::StringMaker<TestType>::convert(std::numeric_limits<TestType>::epsilon());
// CHECK(str.length() >= expectedLength);
//
// if (precision >= 0)
// {
// Catch::StringMaker<TestType>::setPrecision(oldPrecision);
// }
//}
TEST_CASE("Precision of floating point stringification can be set", "[toString][floatingPoint]") {
SECTION("Floats") {
using sm = Catch::StringMaker<float>;
const auto oldPrecision = sm::precision;
const float testFloat = 1.12345678901234567899f;
auto str1 = sm::convert(testFloat);
sm::precision = 5;
// "1." prefix = 2 chars, f suffix is another char
CHECK(str1.size() == 3 + 5);
sm::precision = 10;
auto str2 = sm::convert(testFloat);
REQUIRE(str2.size() == 3 + 10);
sm::precision = oldPrecision;
}
SECTION("Double") {
using sm = Catch::StringMaker<double>;
const auto oldPrecision = sm::precision;
const double testDouble = 1.123456789012345678901234567899;
sm::precision = 5;
auto str1 = sm::convert(testDouble);
// "1." prefix = 2 chars
CHECK(str1.size() == 2 + 5);
sm::precision = 15;
auto str2 = sm::convert(testDouble);
REQUIRE(str2.size() == 2 + 15);
sm::precision = oldPrecision;
}
}
namespace {