func createPodWorkers() (*podWorkers, map[types.UID][]string) {
	lock := sync.Mutex{}
	processed := make(map[types.UID][]string)
	fakeRecorder := &record.FakeRecorder{}
	fakeRuntime := &kubecontainer.FakeRuntime{}
	fakeCache := kubecontainer.NewFakeCache(fakeRuntime)
	podWorkers := newPodWorkers(
		func(pod *api.Pod, mirrorPod *api.Pod, status *kubecontainer.PodStatus, updateType kubetypes.SyncPodType) error {
			func() {
				lock.Lock()
				defer lock.Unlock()
				processed[pod.UID] = append(processed[pod.UID], pod.Name)
			}()
			return nil
		},
		fakeRecorder,
		queue.NewBasicWorkQueue(),
		time.Second,
		time.Second,
		fakeCache,
	)
	return podWorkers, processed
}
// TestFakePodWorkers verifies that the fakePodWorkers behaves the same way as the real podWorkers
// for their invocation of the syncPodFn.
func TestFakePodWorkers(t *testing.T) {
	fakeRecorder := &record.FakeRecorder{}
	fakeRuntime := &kubecontainer.FakeRuntime{}
	fakeCache := kubecontainer.NewFakeCache(fakeRuntime)

	kubeletForRealWorkers := &simpleFakeKubelet{}
	kubeletForFakeWorkers := &simpleFakeKubelet{}

	realPodWorkers := newPodWorkers(kubeletForRealWorkers.syncPodWithWaitGroup, fakeRecorder, queue.NewBasicWorkQueue(), time.Second, time.Second, fakeCache)
	fakePodWorkers := &fakePodWorkers{kubeletForFakeWorkers.syncPod, fakeCache, t}

	tests := []struct {
		pod       *api.Pod
		mirrorPod *api.Pod
	}{
		{
			&api.Pod{},
			&api.Pod{},
		},
		{
			&api.Pod{
				ObjectMeta: api.ObjectMeta{
					UID:       "12345678",
					Name:      "foo",
					Namespace: "new",
				},
			},
			&api.Pod{
				ObjectMeta: api.ObjectMeta{
					UID:       "12345678",
					Name:      "fooMirror",
					Namespace: "new",
				},
			},
		},
		{
			&api.Pod{
				ObjectMeta: api.ObjectMeta{
					UID:       "98765",
					Name:      "bar",
					Namespace: "new",
				},
			},
			&api.Pod{
				ObjectMeta: api.ObjectMeta{
					UID:       "98765",
					Name:      "barMirror",
					Namespace: "new",
				},
			},
		},
	}

	for i, tt := range tests {
		kubeletForRealWorkers.wg.Add(1)
		realPodWorkers.UpdatePod(tt.pod, tt.mirrorPod, kubetypes.SyncPodUpdate, func() {})
		fakePodWorkers.UpdatePod(tt.pod, tt.mirrorPod, kubetypes.SyncPodUpdate, func() {})

		kubeletForRealWorkers.wg.Wait()

		if !reflect.DeepEqual(kubeletForRealWorkers.pod, kubeletForFakeWorkers.pod) {
			t.Errorf("%d: Expected: %#v, Actual: %#v", i, kubeletForRealWorkers.pod, kubeletForFakeWorkers.pod)
		}

		if !reflect.DeepEqual(kubeletForRealWorkers.mirrorPod, kubeletForFakeWorkers.mirrorPod) {
			t.Errorf("%d: Expected: %#v, Actual: %#v", i, kubeletForRealWorkers.mirrorPod, kubeletForFakeWorkers.mirrorPod)
		}

		if !reflect.DeepEqual(kubeletForRealWorkers.podStatus, kubeletForFakeWorkers.podStatus) {
			t.Errorf("%d: Expected: %#v, Actual: %#v", i, kubeletForRealWorkers.podStatus, kubeletForFakeWorkers.podStatus)
		}
	}
}