Function Poll

test/poll.go:10–24

Poll repeatedly calls a function until the function returns the correct response or until poll timeout.

(t testing.TB, d time.Duration, want interface{}, have func() interface{})

// Poll repeatedly calls a function until the function returns the correct response or until poll timeout.
func Poll(t testing.TB, d time.Duration, want interface{}, have func() interface{}) {
	t.Helper()
	deadline := time.Now().Add(d)
	for !time.Now().After(deadline) {

		if reflect.DeepEqual(want, have()) {
			return
		}
		time.Sleep(d / 100)
	}
	h := have()
	if !reflect.DeepEqual(want, h) {
		t.Fatalf("expected %v, got %v", want, h)
	}
}