updateResourceVersion(oldObj, c.versioner, event.ResourceVersion)
		return &watch.Event{Type: watch.Deleted, Object: oldObj}
	}

	return nil
}

// NOTE: sendWatchCacheEvent is assumed to not modify <event> !!!
func (c *cacheWatcher) sendWatchCacheEvent(event *watchCacheEvent) {
	watchEvent := c.convertToWatchEvent(event)
	if watchEvent == nil {
		// Watcher is not interested in that object.
		return
	}

		lock.RLock()
		defer lock.RUnlock()
		return count == 2, nil
	}); err != nil {
		t.Fatalf("expected forget() to be called twice, because sendWatchCacheEvent should not be blocked by the result channel: %v", err)
	}
}

func TestCacheWatcherHandlesFiltering(t *testing.T) {
	filter := func(_ string, _ labels.Set, field fields.Set) bool {