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Unit tests for !year_month::ok() arithmetic. (#425)

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tomaszkam 2019-03-20 01:22:23 +01:00 committed by Howard Hinnant
parent cb7ca96f68
commit e31daf8093
1 changed files with 85 additions and 0 deletions
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85
test/date_test/year_month.pass.cpp
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@ -109,6 +109,90 @@ test_arithmetic()
}
}
void test_arithemtic_not_ok()
{
using namespace date;
using namespace std::chrono;
year_month ym{2018_y, month{14}};
{
year_month ym2{2019_y, month{2}};
assert(ym + months{0} == ym2);
assert(ym - months{0} == ym2);
assert(ym - ym2 == months{0});
assert(ym2 - ym == months{0});
auto ymc = ym;
ymc += months{0};
assert(ymc.ok());
assert(ymc == ym2);
}
{
year_month ym2{2019_y, month{6}};
assert(ym + months{4} == ym2);
assert(ym2 - ym == months{4});
assert(ym - ym2 == -months{4});
auto ymc = ym;
ymc += months{4};
assert(ymc.ok());
assert(ymc == ym2);
}
{
year_month ym2{2018_y, month{10}};
assert(ym - months{4} == ym2);
assert(ym2 - ym == -months{4});
assert(ym - ym2 == months{4});
auto ymc = ym;
ymc -= months{4};
assert(ymc.ok());
assert(ymc == ym2);
}
{
year_month ym2{2020_y, month{6}};
assert(ym + months{16} == ym2);
assert(ym2 - ym == months{16});
assert(ym - ym2 == -months{16});
auto ymc = ym;
ymc += months{16};
assert(ymc.ok());
assert(ymc == ym2);
}
{
year_month ym2{2017_y, month{10}};
assert(ym - months{16} == ym2);
assert(ym2 - ym == -months{16});
assert(ym - ym2 == months(16));
auto ymc = ym;
ymc -= months{16};
assert(ymc.ok());
assert(ymc == ym2);
}
{
year_month ym2{2018_y, month{25}};
assert(ym2 - ym == months{11});
assert(ym - ym2 == -months{11});
}
{
year_month ym2{2019_y, month{25}};
assert(ym2 - ym == months{23});
assert(ym - ym2 == -months{23});
}
}
int
main()
{
@ -135,6 +219,7 @@ main()
static_assert(ym1 - ym2 == -months{11}, "");
test_arithmetic();
test_arithemtic_not_ok();
std::ostringstream os;
os << ym1;