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(options api.ListOptions) (watch.Interface, error) {
return fw, nil
},
ListFunc: func(options api.ListOptions) (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"}})
close(stopCh)
select {
case _, ok := <-fw.ResultChan():
if ok {
t.Errorf("Watch channel left open after stopping the watch")
}
case <-time.After(wait.ForeverTestTimeout):
t.Errorf("the cancellation is at least %s late", wait.ForeverTestTimeout.String())
break
}
}
func TestReflectorResync(t *testing.T) {
iteration := 0
stopCh := make(chan struct{})
rerr := errors.New("expected resync reached")
s := &FakeCustomStore{
ResyncFunc: func() error {
iteration++
if iteration == 2 {
return rerr
}
return nil
},
}
lw := &testLW{
WatchFunc: func(options api.ListOptions) (watch.Interface, error) {
fw := watch.NewFake()
return fw, nil
},
ListFunc: func(options api.ListOptions) (runtime.Object, error) {
return &api.PodList{ListMeta: unversioned.ListMeta{ResourceVersion: "0"}}, nil
},
}
resyncPeriod := 1 * time.Millisecond
r := NewReflector(lw, &api.Pod{}, s, resyncPeriod)
if err := r.ListAndWatch(stopCh); err != nil {
// error from Resync is not propaged up to here.
t.Errorf("expected error %v", err)
}
if iteration != 2 {
t.Errorf("exactly 2 iterations were expected, got: %v", iteration)
}
}
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(options api.ListOptions) (watch.Interface, error) {
rv := options.ResourceVersion
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(options api.ListOptions) (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(wait.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 := Pop(s).(*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")
}
}
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, nevererrc, wait.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)
}
}
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, nevererrc, stopWatch)
if err != errorStopRequested {
t.Errorf("expected stop error, got %q", err)
}
}
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, nevererrc, wait.NeverStop)
if err == nil {
t.Errorf("unexpected non-error")
}
}
// NewSimpleClientset returns a clientset that will respond with the provided objects.
// It's backed by a very simple object tracker that processes creates, updates and deletions as-is,
// without applying any validations and/or defaults. It shouldn't be considered a replacement
// for a real clientset and is mostly useful in simple unit tests.
func NewSimpleClientset(objects ...runtime.Object) *Clientset {
o := testing.NewObjectTracker(api.Scheme, api.Codecs.UniversalDecoder())
for _, obj := range objects {
if err := o.Add(obj); err != nil {
panic(err)
}
}
fakePtr := testing.Fake{}
fakePtr.AddReactor("*", "*", testing.ObjectReaction(o, registered.RESTMapper()))
fakePtr.AddWatchReactor("*", testing.DefaultWatchReactor(watch.NewFake(), nil))
return &Clientset{fakePtr}
}
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(options api.ListOptions) (watch.Interface, error) {
return fw, nil
},
ListFunc: func(options api.ListOptions) (runtime.Object, error) {
return &api.PodList{ListMeta: unversioned.ListMeta{ResourceVersion: "1"}}, nil
},
}
go r.ListAndWatch(wait.NeverStop)
fw.Error(pod)
select {
case _, ok := <-fw.ResultChan():
if ok {
t.Errorf("Watch channel left open after cancellation")
}
case <-time.After(wait.ForeverTestTimeout):
t.Errorf("the cancellation is at least %s late", wait.ForeverTestTimeout.String())
break
}
}
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{
{Type: watch.Added, Object: mkPod("foo", "2")},
{Type: watch.Added, Object: mkPod("bar", "3")},
},
}, {
list: mkList("3", mkPod("foo", "2"), mkPod("bar", "3")),
events: []watch.Event{
{Type: watch.Deleted, Object: mkPod("foo", "4")},
{Type: watch.Added, Object: 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{
{Type: watch.Added, Object: 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(options api.ListOptions) (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(options api.ListOptions) (runtime.Object, error) {
return item.list, item.listErr
},
}
r := NewReflector(lw, &api.Pod{}, s, 0)
r.ListAndWatch(wait.NeverStop)
}
}