Is there an easy way to stub out time.Now() globally during test?

Question

Part of our code is time sensitive and we need to able to reserve something and then release it in 30-60 seconds etc, which we can just do a time.Sleep(60 * time.Secon

Answer 1

If the methods you need to mock are few, such as Now(), you can make a package variable which can be overwritten by tests:

package foo

import "time"

var Now = time.Now

// The rest of your code...which calls Now() instead of time.Now()

then in your test file:

package foo

import (
    "testing"
    "time"
)

var Now = func() time.Time { return ... }

// Your tests