import time // Note: on CI jobs, especially msvc ones, sleep_ms may sleep for much more // time than you have specified. To avoid false positives from CI test // failures, some of the asserts will be run only if you pass `-d stopwatch` fn test_stopwatch_works_as_intended() { mut sw := time.new_stopwatch() // sample code that you want to measure: println('Hello world') time.sleep(1 * time.millisecond) // println('Greeting the world took: ${sw.elapsed().nanoseconds()}ns') assert sw.elapsed().nanoseconds() > 0 } fn test_stopwatch_time_between_pause_and_start_should_be_skipped_in_elapsed() { println('Testing pause function') mut sw := time.new_stopwatch() time.sleep(10 * time.millisecond) // A eprintln('Elapsed after 10ms nap: ${sw.elapsed().milliseconds()}ms') assert sw.elapsed().milliseconds() >= 8 // sometimes it sleeps for 9ms on windows.. sw.pause() time.sleep(10 * time.millisecond) eprintln('Elapsed after pause and another 10ms nap: ${sw.elapsed().milliseconds()}ms') assert sw.elapsed().milliseconds() >= 8 $if stopwatch ? { assert sw.elapsed().milliseconds() < 20 } sw.start() time.sleep(10 * time.millisecond) // B eprintln('Elapsed after resume and another 10ms nap: ${sw.elapsed().milliseconds()}ms') assert sw.elapsed().milliseconds() >= 18 $if stopwatch ? { assert sw.elapsed().milliseconds() < 30 } }