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tests: refactor time module tests
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light7734 2025-07-15 15:53:30 +03:30
parent 60ae1d52f7
commit 940d1aff9f
Signed by: light7734
GPG key ID: 8C30176798F1A6BA
2 changed files with 43 additions and 21 deletions
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8
modules/time/include/time/timer.hpp
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@ -4,14 +4,16 @@
namespace lt {
/** Simple timer class to keep track of the elapsed time */
/** Simple timer class to keep track of the elapsed time. */
class Timer
{
public:
using Timepoint = std::chrono::time_point<std::chrono::steady_clock>;
using Duration = std::chrono::duration<double>;
using Clock = std::chrono::steady_clock;
using Duration = std::chrono::duration<double>;
using Timepoint = std::chrono::time_point<std::chrono::steady_clock>;
Timer(Timepoint start = Clock::now());
void reset(Timepoint start = Clock::now());

56
modules/time/src/timer.tests.cpp
View file

@ -7,37 +7,57 @@ namespace lt {
using lt::test::expect_le;
lt::test::Suite raii = [] {
using std::chrono::microseconds;
lt::test::Case { "default" } = [] {
auto timer = Timer {};
Timer {};
};
lt::test::Case { "unhappy path throws" } = [] {
};
lt::test::Case { "plenty" } = [] {
for (auto i : std::views::iota(0, 101))
for (auto i : std::views::iota(0, 100'001))
{
auto timer = Timer {};
Timer {};
}
};
lt::test::Case { "unhappy" } = [] {
};
lt::test::Case { "has sane elapsed time" } = [] {
auto elapsed_time = Timer {}.elapsed_time();
expect_le(elapsed_time, std::chrono::seconds { 1 });
};
};
lt::test::Suite reset = [] {
lt::test::Case { "non-throwing" } = [] {
auto timer = Timer {};
timer.reset();
lt::test::Suite reset_and_elapsed_time = [] {
using std::chrono::hours;
using std::chrono::microseconds;
lt::test::Case { "won't throw" } = [] {
Timer {}.reset();
std::ignore = Timer {}.elapsed_time();
};
lt::test::Case { "resets elapsed time" } = [] {
auto timer = Timer {};
auto elapsed_time = timer.elapsed_time();
lt::test::Case { "elapsed time is sane" } = [] {
expect_le(Timer {}.elapsed_time(), microseconds { 1 });
};
lt::test::Case { "elapsed time is sane - constructed with old now" } = [] {
const auto timepoint = Timer::Clock::now() - hours { 1 };
// This fails sometimes in debug if error-range is under 10us
expect_le(Timer { timepoint }.elapsed_time(), hours { 1 } + microseconds { 30 });
};
lt::test::Case { "reset -> elapsed time is sane - constructed with old now" } = [] {
auto timer = Timer { Timer::Clock::now() - microseconds { 100 } };
const auto old_elapsed_time = timer.elapsed_time();
timer.reset();
expect_le(timer.elapsed_time() - old_elapsed_time, microseconds { 101 });
};
lt::test::Case { "reset -> elapsed time is sane - reset with future now" } = [] {
auto timer = Timer {};
const auto old_elapsed_time = timer.elapsed_time();
timer.reset(Timer::Clock::now() + microseconds { 100 });
expect_le(timer.elapsed_time() - old_elapsed_time, microseconds { 101 });
};
};