func TestWatch(t *testing.T) {
client := newEtcdClient()
helper := tools.EtcdHelper{Client: client, Codec: runtime.DefaultCodec, ResourceVersioner: runtime.DefaultResourceVersioner}
withEtcdKey(func(key string) {
resp, err := client.Set(key, runtime.DefaultScheme.EncodeOrDie(&api.Pod{JSONBase: api.JSONBase{ID: "foo"}}), 0)
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
expectedVersion := resp.Node.ModifiedIndex
// watch should load the object at the current index
w, err := helper.Watch(key, 0)
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
event := <-w.ResultChan()
if event.Type != watch.Added || event.Object == nil {
t.Fatalf("expected first value to be set to ADDED, got %#v", event)
}
// version should match what we set
pod := event.Object.(*api.Pod)
if pod.ResourceVersion != expectedVersion {
t.Errorf("expected version %d, got %#v", expectedVersion, pod)
}
// should be no events in the stream
select {
case event, ok := <-w.ResultChan():
if !ok {
t.Fatalf("channel closed unexpectedly")
}
t.Fatalf("unexpected object in channel: %#v", event)
default:
}
// should return the previously deleted item in the watch, but with the latest index
resp, err = client.Delete(key, false)
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
expectedVersion = resp.Node.ModifiedIndex
event = <-w.ResultChan()
if event.Type != watch.Deleted {
t.Errorf("expected deleted event %#v", event)
}
pod = event.Object.(*api.Pod)
if pod.ResourceVersion != expectedVersion {
t.Errorf("expected version %d, got %#v", expectedVersion, pod)
}
})
}
