func validateEvent(actualEvent *api.Event, expectedEvent *api.Event, t *testing.T) (*api.Event, error) {
	expectCompression := expectedEvent.Count > 1
	// Just check that the timestamp was set.
	if actualEvent.FirstTimestamp.IsZero() || actualEvent.LastTimestamp.IsZero() {
		t.Errorf("timestamp wasn't set: %#v", *actualEvent)
	}
	if actualEvent.FirstTimestamp.Equal(actualEvent.LastTimestamp.Time) {
		if expectCompression {
			t.Errorf("FirstTimestamp (%q) and LastTimestamp (%q) must be equal to indicate only one occurance of the event, but were different. Actual Event: %#v", actualEvent.FirstTimestamp, actualEvent.LastTimestamp, *actualEvent)
		}
	} else {
		if !expectCompression {
			t.Errorf("FirstTimestamp (%q) and LastTimestamp (%q) must be different to indicate event compression happened, but were the same. Actual Event: %#v", actualEvent.FirstTimestamp, actualEvent.LastTimestamp, *actualEvent)
		}
	}
	actualFirstTimestamp := actualEvent.FirstTimestamp
	actualLastTimestamp := actualEvent.LastTimestamp
	// Temp clear time stamps for comparison because actual values don't matter for comparison
	actualEvent.FirstTimestamp = expectedEvent.FirstTimestamp
	actualEvent.LastTimestamp = expectedEvent.LastTimestamp
	// Check that name has the right prefix.
	if n, en := actualEvent.Name, expectedEvent.Name; !strings.HasPrefix(n, en) {
		t.Errorf("Name '%v' does not contain prefix '%v'", n, en)
	}
	actualEvent.Name = expectedEvent.Name
	if e, a := expectedEvent, actualEvent; !reflect.DeepEqual(e, a) {
		t.Errorf("diff: %s", util.ObjectGoPrintDiff(e, a))
	}
	actualEvent.FirstTimestamp = actualFirstTimestamp
	actualEvent.LastTimestamp = actualLastTimestamp
	return actualEvent, nil
}

// Log an event to the etcd backend.
func (kl *Kubelet) LogEvent(event *api.Event) error {
	if kl.EtcdClient == nil {
		return fmt.Errorf("no etcd client connection.")
	}
	event.Timestamp = time.Now().Unix()
	data, err := json.Marshal(event)
	if err != nil {
		return err
	}

	var response *etcd.Response
	response, err = kl.EtcdClient.AddChild(fmt.Sprintf("/events/%s", event.Container.Name), string(data), 60*60*48 /* 2 days */)
	// TODO(bburns) : examine response here.
	if err != nil {
		glog.Errorf("Error writing event: %s\n", err)
		if response != nil {
			glog.Infof("Response was: %#v\n", *response)
		}
	}
	return err
}

// recordEvent attempts to write event to a sink. It returns true if the event
// was successfully recorded or discarded, false if it should be retried.
// If updateExistingEvent is false, it creates a new event, otherwise it updates
// existing event.
func recordEvent(sink EventSink, event *api.Event, updateExistingEvent bool) bool {
	var newEvent *api.Event
	var err error
	if updateExistingEvent {
		newEvent, err = sink.Update(event)
	}
	// Update can fail because the event may have been removed and it no longer exists.
	if !updateExistingEvent || (updateExistingEvent && isKeyNotFoundError(err)) {
		// Making sure that ResourceVersion is empty on creation
		event.ResourceVersion = ""
		newEvent, err = sink.Create(event)
	}
	if err == nil {
		addOrUpdateEvent(newEvent)
		return true
	}

	// If we can't contact the server, then hold everything while we keep trying.
	// Otherwise, something about the event is malformed and we should abandon it.
	switch err.(type) {
	case *client.RequestConstructionError:
		// We will construct the request the same next time, so don't keep trying.
		glog.Errorf("Unable to construct event '%#v': '%v' (will not retry!)", event, err)
		return true
	case *errors.StatusError:
		if errors.IsAlreadyExists(err) {
			glog.V(5).Infof("Server rejected event '%#v': '%v' (will not retry!)", event, err)
		} else {
			glog.Errorf("Server rejected event '%#v': '%v' (will not retry!)", event, err)
		}
		return true
	case *errors.UnexpectedObjectError:
		// We don't expect this; it implies the server's response didn't match a
		// known pattern. Go ahead and retry.
	default:
		// This case includes actual http transport errors. Go ahead and retry.
	}
	glog.Errorf("Unable to write event: '%v' (may retry after sleeping)", err)
	return false
}