import ( "time" "github.com/pivotal-golang/clock/fakeclock" ) func TestFunc(t *testing.T) { fc := fakeclock.NewFakeClock(time.Now()) // Do some setup that relies on current time fc.WaitFor(1 * time.Second) // Ensure that time-sensitive functionality behaves as expected }In this example, we create a new FakeClock instance with the current time as its starting point. We then do some setup that depends on the current time (e.g., setting an expiration time for a token), and then simulate the passage of one second using `WaitFor` method on the fake clock. Finally, we assert that the time-sensitive functionality behaves as expected. Overall, the `github.com/pivotal-golang/clock/fakeclock` package is a useful tool for writing deterministic tests for time-dependent functionality.