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Add tests for #360

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abolz 2017-12-08 15:18:32 +01:00
parent 468525625a
commit 13160d93b2
1 changed files with 58 additions and 0 deletions
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58
test/src/unit-regression.cpp
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@ -593,6 +593,64 @@ TEST_CASE("regression tests")
"[json.exception.out_of_range.406] number overflow parsing '22e2222'"); "[json.exception.out_of_range.406] number overflow parsing '22e2222'");
} }
SECTION("issue #360 - Loss of precision when serializing <double>")
{
auto CheckRoundtrip = [](double number)
{
CAPTURE(number);
json j = number;
CHECK(j.is_number_float());
std::stringstream ss;
ss << j;
CHECK_NOTHROW(ss >> j);
CHECK(j.is_number_float());
CHECK(j.get<json::number_float_t>() == number);
};
CheckRoundtrip(100000000000.1236);
CheckRoundtrip(std::numeric_limits<json::number_float_t>::max());
// Some more numbers which fail to roundtrip when serialized with
// digits10 significand digits (instead of max_digits10)
CheckRoundtrip(1.541888611948064e-17);
CheckRoundtrip(5.418771028591015e-16);
CheckRoundtrip(9.398685592608595e-15);
CheckRoundtrip(8.826843952762347e-14);
CheckRoundtrip(8.143291313475335e-13);
CheckRoundtrip(4.851328172762508e-12);
CheckRoundtrip(6.677850998084358e-11);
CheckRoundtrip(3.995398518174525e-10);
CheckRoundtrip(1.960452605645124e-9);
CheckRoundtrip(3.551812586302883e-8);
CheckRoundtrip(2.947988411689261e-7);
CheckRoundtrip(8.210166748056192e-6);
CheckRoundtrip(6.104889704266753e-5);
CheckRoundtrip(0.0008629954631330876);
CheckRoundtrip(0.004936993881051611);
CheckRoundtrip(0.08309725102608073);
CheckRoundtrip(0.5210494268499783);
CheckRoundtrip(6.382927930939767);
CheckRoundtrip(59.94947245358671);
CheckRoundtrip(361.0838651266122);
CheckRoundtrip(4678.354596181877);
CheckRoundtrip(61412.17658956043);
CheckRoundtrip(725696.0799057782);
CheckRoundtrip(2811732.583399828);
CheckRoundtrip(30178351.07533605);
CheckRoundtrip(689684880.3235844);
CheckRoundtrip(5714887673.555147);
CheckRoundtrip(84652038821.18808);
CheckRoundtrip(156510583431.7721);
CheckRoundtrip(5938450569021.732);
CheckRoundtrip(83623297654460.33);
CheckRoundtrip(701466573254773.6);
CheckRoundtrip(1369013370304513);
CheckRoundtrip(96963648023094720);
CheckRoundtrip(3.478237409280108e+17);
}
SECTION("issue #366 - json::parse on failed stream gets stuck") SECTION("issue #366 - json::parse on failed stream gets stuck")
{ {
std::ifstream f("file_not_found.json"); std::ifstream f("file_not_found.json");