Example #1
0
func TestRunUntil(t *testing.T) {
	stopCh := make(chan struct{})
	store := NewStore(MetaNamespaceKeyFunc)
	r := NewReflector(&testLW{}, &api.Pod{}, store, 0)
	fw := watch.NewFake()
	r.listerWatcher = &testLW{
		WatchFunc: func(rv string) (watch.Interface, error) {
			return fw, nil
		},
		ListFunc: func() (runtime.Object, error) {
			return &api.PodList{ListMeta: unversioned.ListMeta{ResourceVersion: "1"}}, nil
		},
	}
	r.RunUntil(stopCh)
	// Synchronously add a dummy pod into the watch channel so we
	// know the RunUntil go routine is in the watch handler.
	fw.Add(&api.Pod{ObjectMeta: api.ObjectMeta{Name: "bar"}})
	stopCh <- struct{}{}
	select {
	case _, ok := <-fw.ResultChan():
		if ok {
			t.Errorf("Watch channel left open after stopping the watch")
		}
	case <-time.After(util.ForeverTestTimeout):
		t.Errorf("the cancellation is at least %s late", util.ForeverTestTimeout.String())
		break
	}
}
Example #2
0
func TestReflectorListAndWatch(t *testing.T) {
	createdFakes := make(chan *watch.FakeWatcher)

	// The ListFunc says that it's at revision 1. Therefore, we expect our WatchFunc
	// to get called at the beginning of the watch with 1, and again with 3 when we
	// inject an error.
	expectedRVs := []string{"1", "3"}
	lw := &testLW{
		WatchFunc: func(rv string) (watch.Interface, error) {
			fw := watch.NewFake()
			if e, a := expectedRVs[0], rv; e != a {
				t.Errorf("Expected rv %v, but got %v", e, a)
			}
			expectedRVs = expectedRVs[1:]
			// channel is not buffered because the for loop below needs to block. But
			// we don't want to block here, so report the new fake via a go routine.
			go func() { createdFakes <- fw }()
			return fw, nil
		},
		ListFunc: func() (runtime.Object, error) {
			return &api.PodList{ListMeta: unversioned.ListMeta{ResourceVersion: "1"}}, nil
		},
	}
	s := NewFIFO(MetaNamespaceKeyFunc)
	r := NewReflector(lw, &api.Pod{}, s, 0)
	go r.ListAndWatch(util.NeverStop)

	ids := []string{"foo", "bar", "baz", "qux", "zoo"}
	var fw *watch.FakeWatcher
	for i, id := range ids {
		if fw == nil {
			fw = <-createdFakes
		}
		sendingRV := strconv.FormatUint(uint64(i+2), 10)
		fw.Add(&api.Pod{ObjectMeta: api.ObjectMeta{Name: id, ResourceVersion: sendingRV}})
		if sendingRV == "3" {
			// Inject a failure.
			fw.Stop()
			fw = nil
		}
	}

	// Verify we received the right ids with the right resource versions.
	for i, id := range ids {
		pod := s.Pop().(*api.Pod)
		if e, a := id, pod.Name; e != a {
			t.Errorf("%v: Expected %v, got %v", i, e, a)
		}
		if e, a := strconv.FormatUint(uint64(i+2), 10), pod.ResourceVersion; e != a {
			t.Errorf("%v: Expected %v, got %v", i, e, a)
		}
	}

	if len(expectedRVs) != 0 {
		t.Error("called watchStarter an unexpected number of times")
	}
}
Example #3
0
func TestReflectorWatchHandler(t *testing.T) {
	s := NewStore(MetaNamespaceKeyFunc)
	g := NewReflector(&testLW{}, &api.Pod{}, s, 0)
	fw := watch.NewFake()
	s.Add(&api.Pod{ObjectMeta: api.ObjectMeta{Name: "foo"}})
	s.Add(&api.Pod{ObjectMeta: api.ObjectMeta{Name: "bar"}})
	go func() {
		fw.Add(&api.Service{ObjectMeta: api.ObjectMeta{Name: "rejected"}})
		fw.Delete(&api.Pod{ObjectMeta: api.ObjectMeta{Name: "foo"}})
		fw.Modify(&api.Pod{ObjectMeta: api.ObjectMeta{Name: "bar", ResourceVersion: "55"}})
		fw.Add(&api.Pod{ObjectMeta: api.ObjectMeta{Name: "baz", ResourceVersion: "32"}})
		fw.Stop()
	}()
	var resumeRV string
	err := g.watchHandler(fw, &resumeRV, neverExitWatch, util.NeverStop)
	if err != nil {
		t.Errorf("unexpected error %v", err)
	}

	mkPod := func(id string, rv string) *api.Pod {
		return &api.Pod{ObjectMeta: api.ObjectMeta{Name: id, ResourceVersion: rv}}
	}

	table := []struct {
		Pod    *api.Pod
		exists bool
	}{
		{mkPod("foo", ""), false},
		{mkPod("rejected", ""), false},
		{mkPod("bar", "55"), true},
		{mkPod("baz", "32"), true},
	}
	for _, item := range table {
		obj, exists, _ := s.Get(item.Pod)
		if e, a := item.exists, exists; e != a {
			t.Errorf("%v: expected %v, got %v", item.Pod, e, a)
		}
		if !exists {
			continue
		}
		if e, a := item.Pod.ResourceVersion, obj.(*api.Pod).ResourceVersion; e != a {
			t.Errorf("%v: expected %v, got %v", item.Pod, e, a)
		}
	}

	// RV should send the last version we see.
	if e, a := "32", resumeRV; e != a {
		t.Errorf("expected %v, got %v", e, a)
	}

	// last sync resource version should be the last version synced with store
	if e, a := "32", g.LastSyncResourceVersion(); e != a {
		t.Errorf("expected %v, got %v", e, a)
	}
}
Example #4
0
func TestReflectorStopWatch(t *testing.T) {
	s := NewStore(MetaNamespaceKeyFunc)
	g := NewReflector(&testLW{}, &api.Pod{}, s, 0)
	fw := watch.NewFake()
	var resumeRV string
	stopWatch := make(chan struct{}, 1)
	stopWatch <- struct{}{}
	err := g.watchHandler(fw, &resumeRV, neverExitWatch, stopWatch)
	if err != errorStopRequested {
		t.Errorf("expected stop error, got %q", err)
	}
}
Example #5
0
func TestReflectorWatchHandlerTimeout(t *testing.T) {
	s := NewStore(MetaNamespaceKeyFunc)
	g := NewReflector(&testLW{}, &api.Pod{}, s, 0)
	fw := watch.NewFake()
	var resumeRV string
	exit := make(chan time.Time, 1)
	exit <- time.Now()
	err := g.watchHandler(fw, &resumeRV, exit, util.NeverStop)
	if err != errorResyncRequested {
		t.Errorf("expected timeout error, but got %q", err)
	}
}
Example #6
0
func TestReflectorWatchHandlerError(t *testing.T) {
	s := NewStore(MetaNamespaceKeyFunc)
	g := NewReflector(&testLW{}, &api.Pod{}, s, 0)
	fw := watch.NewFake()
	go func() {
		fw.Stop()
	}()
	var resumeRV string
	err := g.watchHandler(fw, &resumeRV, neverExitWatch, util.NeverStop)
	if err == nil {
		t.Errorf("unexpected non-error")
	}
}
Example #7
0
// Clientset returns a clientset that will respond with the provided objects
func NewSimpleClientset(objects ...runtime.Object) *Clientset {
	o := core.NewObjects(api.Scheme, api.Codecs.UniversalDecoder())
	for _, obj := range objects {
		if err := o.Add(obj); err != nil {
			panic(err)
		}
	}

	fakePtr := core.Fake{}
	fakePtr.AddReactor("*", "*", core.ObjectReaction(o, api.RESTMapper))

	fakePtr.AddWatchReactor("*", core.DefaultWatchReactor(watch.NewFake(), nil))

	return &Clientset{fakePtr}
}
Example #8
0
// NewSimpleFake returns a client that will respond with the provided objects
func NewSimpleFake(objects ...runtime.Object) *Fake {
	o := NewObjects(api.Scheme, api.Codecs.UniversalDecoder())
	for _, obj := range objects {
		if err := o.Add(obj); err != nil {
			panic(err)
		}
	}

	fakeClient := &Fake{}
	fakeClient.AddReactor("*", "*", ObjectReaction(o, api.RESTMapper))

	fakeClient.AddWatchReactor("*", DefaultWatchReactor(watch.NewFake(), nil))

	return fakeClient
}
Example #9
0
func TestReflectorResync(t *testing.T) {
	s := NewStore(MetaNamespaceKeyFunc)

	currentTime := time.Time{}
	iteration := 0

	lw := &testLW{
		WatchFunc: func(rv string) (watch.Interface, error) {
			if iteration == 0 {
				// Move time, but do not force resync.
				currentTime = currentTime.Add(30 * time.Second)
			} else if iteration == 1 {
				// Move time to force resync.
				currentTime = currentTime.Add(28 * time.Second)
			} else if iteration >= 2 {
				t.Fatalf("should have forced resync earlier")
			}
			iteration++
			fw := watch.NewFake()
			// Send something to the watcher to avoid "watch too short" errors.
			go func() {
				fw.Add(&api.Pod{ObjectMeta: api.ObjectMeta{Name: "foo", ResourceVersion: strconv.Itoa(iteration)}})
				fw.Stop()
			}()
			return fw, nil
		},
		ListFunc: func() (runtime.Object, error) {
			return &api.PodList{ListMeta: unversioned.ListMeta{ResourceVersion: "0"}}, nil
		},
	}
	resyncPeriod := time.Minute
	r := NewReflector(lw, &api.Pod{}, s, resyncPeriod)
	r.now = func() time.Time { return currentTime }

	r.ListAndWatch(util.NeverStop)
	if iteration != 2 {
		t.Errorf("exactly 2 iterations were expected, got: %v", iteration)
	}
}
Example #10
0
func TestCloseWatchChannelOnError(t *testing.T) {
	r := NewReflector(&testLW{}, &api.Pod{}, NewStore(MetaNamespaceKeyFunc), 0)
	pod := &api.Pod{ObjectMeta: api.ObjectMeta{Name: "bar"}}
	fw := watch.NewFake()
	r.listerWatcher = &testLW{
		WatchFunc: func(rv string) (watch.Interface, error) {
			return fw, nil
		},
		ListFunc: func() (runtime.Object, error) {
			return &api.PodList{ListMeta: unversioned.ListMeta{ResourceVersion: "1"}}, nil
		},
	}
	go r.ListAndWatch(util.NeverStop)
	fw.Error(pod)
	select {
	case _, ok := <-fw.ResultChan():
		if ok {
			t.Errorf("Watch channel left open after cancellation")
		}
	case <-time.After(util.ForeverTestTimeout):
		t.Errorf("the cancellation is at least %s late", util.ForeverTestTimeout.String())
		break
	}
}
Example #11
0
func TestReflectorListAndWatchWithErrors(t *testing.T) {
	mkPod := func(id string, rv string) *api.Pod {
		return &api.Pod{ObjectMeta: api.ObjectMeta{Name: id, ResourceVersion: rv}}
	}
	mkList := func(rv string, pods ...*api.Pod) *api.PodList {
		list := &api.PodList{ListMeta: unversioned.ListMeta{ResourceVersion: rv}}
		for _, pod := range pods {
			list.Items = append(list.Items, *pod)
		}
		return list
	}
	table := []struct {
		list     *api.PodList
		listErr  error
		events   []watch.Event
		watchErr error
	}{
		{
			list: mkList("1"),
			events: []watch.Event{
				{watch.Added, mkPod("foo", "2")},
				{watch.Added, mkPod("bar", "3")},
			},
		}, {
			list: mkList("3", mkPod("foo", "2"), mkPod("bar", "3")),
			events: []watch.Event{
				{watch.Deleted, mkPod("foo", "4")},
				{watch.Added, mkPod("qux", "5")},
			},
		}, {
			listErr: fmt.Errorf("a list error"),
		}, {
			list:     mkList("5", mkPod("bar", "3"), mkPod("qux", "5")),
			watchErr: fmt.Errorf("a watch error"),
		}, {
			list: mkList("5", mkPod("bar", "3"), mkPod("qux", "5")),
			events: []watch.Event{
				{watch.Added, mkPod("baz", "6")},
			},
		}, {
			list: mkList("6", mkPod("bar", "3"), mkPod("qux", "5"), mkPod("baz", "6")),
		},
	}

	s := NewFIFO(MetaNamespaceKeyFunc)
	for line, item := range table {
		if item.list != nil {
			// Test that the list is what currently exists in the store.
			current := s.List()
			checkMap := map[string]string{}
			for _, item := range current {
				pod := item.(*api.Pod)
				checkMap[pod.Name] = pod.ResourceVersion
			}
			for _, pod := range item.list.Items {
				if e, a := pod.ResourceVersion, checkMap[pod.Name]; e != a {
					t.Errorf("%v: expected %v, got %v for pod %v", line, e, a, pod.Name)
				}
			}
			if e, a := len(item.list.Items), len(checkMap); e != a {
				t.Errorf("%v: expected %v, got %v", line, e, a)
			}
		}
		watchRet, watchErr := item.events, item.watchErr
		lw := &testLW{
			WatchFunc: func(rv string) (watch.Interface, error) {
				if watchErr != nil {
					return nil, watchErr
				}
				watchErr = fmt.Errorf("second watch")
				fw := watch.NewFake()
				go func() {
					for _, e := range watchRet {
						fw.Action(e.Type, e.Object)
					}
					fw.Stop()
				}()
				return fw, nil
			},
			ListFunc: func() (runtime.Object, error) {
				return item.list, item.listErr
			},
		}
		r := NewReflector(lw, &api.Pod{}, s, 0)
		r.ListAndWatch(util.NeverStop)
	}
}