// must always be called, even if the consumer has not yet called
	// ResultChan().
	//
	// Only the consumer should call Stop(), not the producer. If the producer
	// errors and needs to stop the watch prematurely, it should instead send
	// an error event and close the result channel.
	Stop()

	// ResultChan returns a channel which will receive events from the event

	// It's fine to double cancel.
	wc.cancel()

	// we need to wait until resultChan wouldn't be used anymore
	resultChanWG.Wait()
	close(wc.resultChan)
}

func (wc *watchChan) Stop() {
	wc.cancel()
}

func (wc *watchChan) ResultChan() <-chan watch.Event {
	return wc.resultChan
}

func (wc *watchChan) RequestWatchProgress() error {

	case e, ok := <-w.ResultChan():
		if ok {
			var obj string
			switch e.Object.(type) {
			case *example.Pod:
				obj = e.Object.(*example.Pod).Name
			case *v1.Status:
				obj = e.Object.(*v1.Status).Message
			}
			t.Errorf("ResultChan should have been closed. Event: %s. Object: %s", e.Type, obj)
		}
	case <-time.After(wait.ForeverTestTimeout):
		t.Errorf("time out after waiting 1s on ResultChan")
	}
}

	}
	w2, err := m.Watch()
	if err != nil {
		t.Fatalf("Unable start event watcher: '%v' (will not retry!)", err)
	}
	w.Stop()
	m.Shutdown()
	if _, open := <-w.ResultChan(); open {
		t.Errorf("Stop didn't work?")
	}
	if _, open := <-w2.ResultChan(); open {
		t.Errorf("Shutdown didn't work?")
	}
	// Extra stops don't hurt things
	w.Stop()
	w2.Stop()
}

	})

	go func() {
		for _, item := range table {
			source.Action(item.Type, item.Object)
		}
		source.Stop()
	}()

	var got []string
	for {
		event, ok := <-filtered.ResultChan()
		if !ok {
			break
		}
		got = append(got, string(event.Object.(testType)))
	}

	if e, a := []string{"foo", "qux", "zoo"}, got; !reflect.DeepEqual(e, a) {
		t.Errorf("got %v, wanted %v", e, a)
	}
}

	w := store.watcher.createWatchChan(ctx, "/abc", 0, false, false, storage.Everything)
	// make resultChan and errChan blocking to ensure ordering.
	w.resultChan = make(chan watch.Event)
	w.errChan = make(chan error)
	// The event flow goes like:
	// - first we send an error, it should block on resultChan.
	// - Then we cancel ctx. The blocking on resultChan should be freed up
	//   and run() goroutine should return.
	var wg sync.WaitGroup

			defer cancel()
			resultChan, errChan := make(chan string, 1), make(chan error, 1)
			go func(resultChan chan string, errChan chan error, ctx context.Context, cniConfName, mountedCNINetDir string, chained bool) {
				result, err := getCNIConfigFilepath(ctx, cniConfName, mountedCNINetDir, chained)
				if err != nil {
					errChan <- err
					return
				}
				resultChan <- result

		f:        f,
	}
	go fw.loop()
	return fw
}

type filteredWatch struct {
	incoming Interface
	result   chan Event
	f        FilterFunc
}

// ResultChan returns a channel which will receive filtered events.
func (fw *filteredWatch) ResultChan() <-chan Event {
	return fw.result
}

// Stop stops the upstream watch, which will eventually stop this watch.
func (fw *filteredWatch) Stop() {
	fw.incoming.Stop()
}

	}()

	// We expect all init events to be delivered.
	for i := 0; i < numObjects; i++ {
		<-w.ResultChan()
	}
	// We don't expect any other event to be delivered and thus
	// the ResultChan to be closed.
	result, ok := <-w.ResultChan()
	if ok {
		t.Errorf("unexpected event: %#v", result)
	}

	wg.Wait()
}

func TestTimeBucketWatchersBasic(t *testing.T) {

	d.RLock()
	defer d.RUnlock()
	return d.requestWatchProgressCounter
}

type dummyWatch struct {
	ch chan watch.Event
}

func (w *dummyWatch) ResultChan() <-chan watch.Event {
	return w.ch
}

func (w *dummyWatch) Stop() {
	close(w.ch)
}

func newDummyWatch() watch.Interface {
	return &dummyWatch{
		ch: make(chan watch.Event),
	}
}