63 lines
1.8 KiB
C++
63 lines
1.8 KiB
C++
import test;
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import time;
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using ::lt::time::Timer;
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/* @note: error margin is high since run-time may slow down extremely due to
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* sanitization/debugging or execution through valgrind...
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* <1us error margin is tested manually in release builds and it works fine.
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**/
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constexpr auto max_error_margin = std::chrono::milliseconds { 1 };
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Suite raii = "raii"_suite = [] {
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using std::chrono::microseconds;
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Case { "happy paths" } = [] {
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Timer {};
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};
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Case { "many" } = [] {
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for (auto idx : std::views::iota(0, 100'001))
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{
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ignore = idx;
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Timer {};
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}
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};
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};
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Suite reset_and_elapsed_time = "reset_and_elapsed_time"_suite = [] {
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using std::chrono::hours;
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using std::chrono::microseconds;
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Case { "happy path" } = [] {
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Timer {}.reset();
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ignore = Timer {}.elapsed_time();
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};
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Case { "elapsed time is sane" } = [] {
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expect_le(Timer {}.elapsed_time(), max_error_margin);
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};
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Case { "elapsed time is sane - constructed with old now" } = [] {
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const auto timepoint = Timer::Clock::now() - hours { 1 };
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// This fails sometimes in debug if error-range is under 10us
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expect_le(Timer { timepoint }.elapsed_time(), hours { 1 } + max_error_margin);
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};
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Case { "reset -> elapsed time is sane - constructed with old now" } = [] {
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auto timer = Timer { Timer::Clock::now() - microseconds { 100 } };
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const auto old_elapsed_time = timer.elapsed_time();
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timer.reset();
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expect_le(timer.elapsed_time() - old_elapsed_time, microseconds { 100 } + max_error_margin);
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};
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Case { "reset -> elapsed time is sane - reset with future now" } = [] {
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auto timer = Timer {};
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const auto old_elapsed_time = timer.elapsed_time();
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timer.reset(Timer::Clock::now() + microseconds { 100 });
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expect_le(timer.elapsed_time() - old_elapsed_time, microseconds { 100 } + max_error_margin);
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};
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};
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