如何在Golang中测试睡眠功能

Question

I have written my own sleep function and want to test it. Following is my code:

func TestSleep(t *testing.T) {
    start := time.Now()
    mySleepFunction(65)
    end := time.Now()
    if (end - start) != 65 {
        t.Error("Incorrect sleep function")
    }
}

This is not working. I am trying to get start time and end time and then compare it with expected time. The expected time will be in seconds. I tried end.Sub(start) but this returns me something like 1m30.0909, instead I need 90 as a result. It would be great if someone could help me. Thanks :)

Answer 1

If you use time.Unix() which gives you the amount of seconds since the epoch (January 1, 1970 UTC.) then your test should work.

func TestSleep(t *testing.T) {
    start := time.Now().Unix()
    mySleepFunction(65)
    end := time.Now().Unix()
    if (end - start) != 65{
        t.Error("Incorrect sleep function")
    }
}

Currently, your code is subtracting a time.Now() which doesn't return the result you intend. Your test wants simple int values that represent seconds.