v/vlib/time/stopwatch_test.v

36 lines
1.1 KiB
V

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() {
sw := time.new_stopwatch()
// sample code that you want to measure:
println('Hello world')
time.sleep_ms(1)
//
println('Greeting the world took: ${sw.elapsed().nanoseconds()}ns')
assert sw.elapsed().nanoseconds() > 0
}
fn test_stopwatch_time_between_pause_and_start_should_be_skipped_in_elapsed() {
sw := time.new_stopwatch()
time.sleep_ms(10) // A
// eprintln('${sw.elapsed().milliseconds()}ms')
assert sw.elapsed().milliseconds() >= 10
sw.pause()
time.sleep_ms(10)
// eprintln('${sw.elapsed().milliseconds()}ms')
assert sw.elapsed().milliseconds() >= 10
$if stopwatch {
assert sw.elapsed().milliseconds() < 20
}
sw.start()
time.sleep_ms(10) // B
// Here, sw.elapsed() should be ~10ms (from A) + ~10ms (from B) >= 20ms
assert sw.elapsed().milliseconds() >= 20
$if stopwatch {
assert sw.elapsed().milliseconds() < 30
}
}