import time

fn test_duration_str() {
	assert time.Duration(1 * time.nanosecond).str() == '1ns'
	assert time.Duration(999 * time.nanosecond).str() == '999ns'
	assert time.Duration(1000 * time.nanosecond).str() == '1.000us'
	//
	assert time.Duration(1 * time.microsecond).str() == '1.000us'
	assert time.Duration(999 * time.microsecond).str() == '999.000us'
	assert time.Duration(1000 * time.microsecond).str() == '1.000ms'
	//
	assert time.Duration(1 * time.second).str() == '1.000s'
	assert time.Duration(999 * time.second).str() == '16:39.000'
	assert time.Duration(1000 * time.second).str() == '16:40.000'
	//
	assert time.Duration(1 * time.minute).str() == '1:00.000'
	assert time.Duration(999 * time.minute).str() == '16:39:00'
	assert time.Duration(1000 * time.minute).str() == '16:40:00'
	//
	assert time.Duration(1 * time.hour).str() == '1:00:00'
	assert time.Duration(999 * time.hour).str() == '999:00:00'
	assert time.Duration(1000 * time.hour).str() == '1000:00:00'
	//
	assert time.Duration(1 * time.microsecond + 7 * time.nanosecond).str() == '1.007us'
	//
	assert time.Duration(1 * time.second + 5 * time.nanosecond).str() == '1.000s'
	assert time.Duration(1 * time.second + 5 * time.microsecond).str() == '1.000s'
	assert time.Duration(1 * time.second + 5 * time.millisecond).str() == '1.005s'
	//
	assert time.Duration(1 * time.hour + 5 * time.millisecond).str() == '1:00:00'
	assert time.Duration(1 * time.hour + 5 * time.second).str() == '1:00:05'
	assert time.Duration(168 * time.hour + 5 * time.minute + 7 * time.second).str() == '168:05:07'
}