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import time
// NB: 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
}
}
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