)

func TestWriteOnceSet(t *testing.T) {
	oldTime := time.Now()
	cval := &oldTime
	ctx, cancel := context.WithCancel(context.Background())
	wr := NewWriteOnce(nil, ctx, cval)
	gots := make(chan interface{})
	goGetExpectNotYet(t, wr, gots, "Set")
	now := time.Now()
	aval := &now
	if !wr.Set(aval) {
		t.Error("Set() returned false")
	}
	expectGotValue(t, gots, aval)
	goGetAndExpect(t, wr, gots, aval)
	later := time.Now()

	now := time.Now()
	clock, counter := testeventclock.NewFake(now, 0, nil)
	var lock sync.Mutex
	wr := NewCountingWriteOnce(counter, &lock, nil, doneCh, cval)
	gots := make(chan interface{}, 1)
	goGetExpectNotYet(t, clock, counter, wr, gots, "Set")
	aval := &now
	func() {
		lock.Lock()
		defer lock.Unlock()
		if !wr.Set(aval) {
			t.Error("Set() returned false")
		}
	}()
	clock.Run(nil)