Shorten execution time of HPA tests

pkg/client/record/event.go

@@ -35,7 +35,7 @@ import (
 
 const maxTriesPerEvent = 12
 
-var sleepDuration = 10 * time.Second
+var defaultSleepDuration = 10 * time.Second
 
 const maxQueuedEvents = 1000
 
@@ -93,11 +93,16 @@ type EventBroadcaster interface {
 
 // Creates a new event broadcaster.
 func NewBroadcaster() EventBroadcaster {
-	return &eventBroadcasterImpl{watch.NewBroadcaster(maxQueuedEvents, watch.DropIfChannelFull)}
+	return &eventBroadcasterImpl{watch.NewBroadcaster(maxQueuedEvents, watch.DropIfChannelFull), defaultSleepDuration}
+}
+
+func NewBroadcasterForTests(sleepDuration time.Duration) EventBroadcaster {
+	return &eventBroadcasterImpl{watch.NewBroadcaster(maxQueuedEvents, watch.DropIfChannelFull), sleepDuration}
 }
 
 type eventBroadcasterImpl struct {
 	*watch.Broadcaster
+	sleepDuration time.Duration
 }
 
 // StartRecordingToSink starts sending events received from the specified eventBroadcaster to the given sink.
@@ -110,11 +115,11 @@ func (eventBroadcaster *eventBroadcasterImpl) StartRecordingToSink(sink EventSin
 	eventCorrelator := NewEventCorrelator(util.RealClock{})
 	return eventBroadcaster.StartEventWatcher(
 		func(event *api.Event) {
-			recordToSink(sink, event, eventCorrelator, randGen)
+			recordToSink(sink, event, eventCorrelator, randGen, eventBroadcaster.sleepDuration)
 		})
 }
 
-func recordToSink(sink EventSink, event *api.Event, eventCorrelator *EventCorrelator, randGen *rand.Rand) {
+func recordToSink(sink EventSink, event *api.Event, eventCorrelator *EventCorrelator, randGen *rand.Rand, sleepDuration time.Duration) {
 	// Make a copy before modification, because there could be multiple listeners.
 	// Events are safe to copy like this.
 	eventCopy := *event

pkg/client/record/event_test.go

@@ -33,11 +33,6 @@ import (
 	"k8s.io/kubernetes/pkg/util/strategicpatch"
 )
 
-func init() {
-	// Don't bother sleeping between retries.
-	sleepDuration = 0
-}
-
 type testEventSink struct {
 	OnCreate func(e *api.Event) (*api.Event, error)
 	OnUpdate func(e *api.Event) (*api.Event, error)
@@ -346,7 +341,7 @@ func TestEventf(t *testing.T) {
 		},
 		OnPatch: OnPatchFactory(testCache, patchEvent),
 	}
-	eventBroadcaster := NewBroadcaster()
+	eventBroadcaster := NewBroadcasterForTests(0)
 	sinkWatcher := eventBroadcaster.StartRecordingToSink(&testEvents)
 
 	clock := util.NewFakeClock(time.Now())
@@ -431,7 +426,7 @@ func TestWriteEventError(t *testing.T) {
 			},
 		}
 		ev := &api.Event{}
-		recordToSink(sink, ev, eventCorrelator, randGen)
+		recordToSink(sink, ev, eventCorrelator, randGen, 0)
 		if attempts != ent.attemptsWanted {
 			t.Errorf("case %v: wanted %d, got %d attempts", caseName, ent.attemptsWanted, attempts)
 		}
@@ -460,7 +455,7 @@ func TestLotsOfEvents(t *testing.T) {
 		},
 	}
 
-	eventBroadcaster := NewBroadcaster()
+	eventBroadcaster := NewBroadcasterForTests(0)
 	sinkWatcher := eventBroadcaster.StartRecordingToSink(&testEvents)
 	logWatcher := eventBroadcaster.StartLogging(func(formatter string, args ...interface{}) {
 		loggerCalled <- struct{}{}
@@ -557,7 +552,7 @@ func TestEventfNoNamespace(t *testing.T) {
 		},
 		OnPatch: OnPatchFactory(testCache, patchEvent),
 	}
-	eventBroadcaster := NewBroadcaster()
+	eventBroadcaster := NewBroadcasterForTests(0)
 	sinkWatcher := eventBroadcaster.StartRecordingToSink(&testEvents)
 
 	clock := util.NewFakeClock(time.Now())
@@ -846,7 +841,7 @@ func TestMultiSinkCache(t *testing.T) {
 		OnPatch: OnPatchFactory(testCache2, patchEvent2),
 	}
 
-	eventBroadcaster := NewBroadcaster()
+	eventBroadcaster := NewBroadcasterForTests(0)
 	clock := util.NewFakeClock(time.Now())
 	recorder := recorderWithFakeClock(api.EventSource{Component: "eventTest"}, eventBroadcaster, clock)
 

pkg/controller/podautoscaler/horizontal.go

@@ -65,19 +65,8 @@ type HorizontalController struct {
 var downscaleForbiddenWindow = 5 * time.Minute
 var upscaleForbiddenWindow = 3 * time.Minute
 
-func NewHorizontalController(evtNamespacer unversionedcore.EventsGetter, scaleNamespacer unversionedextensions.ScalesGetter, hpaNamespacer unversionedextensions.HorizontalPodAutoscalersGetter, metricsClient metrics.MetricsClient, resyncPeriod time.Duration) *HorizontalController {
-	broadcaster := record.NewBroadcaster()
-	broadcaster.StartRecordingToSink(&unversionedcore.EventSinkImpl{evtNamespacer.Events("")})
-	recorder := broadcaster.NewRecorder(api.EventSource{Component: "horizontal-pod-autoscaler"})
-
-	controller := &HorizontalController{
-		metricsClient:   metricsClient,
-		eventRecorder:   recorder,
-		scaleNamespacer: scaleNamespacer,
-		hpaNamespacer:   hpaNamespacer,
-	}
-
-	controller.store, controller.controller = framework.NewInformer(
+func newInformer(controller *HorizontalController, resyncPeriod time.Duration) (cache.Store, *framework.Controller) {
+	return framework.NewInformer(
 		&cache.ListWatch{
 			ListFunc: func(options api.ListOptions) (runtime.Object, error) {
 				return controller.hpaNamespacer.HorizontalPodAutoscalers(api.NamespaceAll).List(options)
@@ -111,6 +100,22 @@ func NewHorizontalController(evtNamespacer unversionedcore.EventsGetter, scaleNa
 			// We are not interested in deletions.
 		},
 	)
+}
+
+func NewHorizontalController(evtNamespacer unversionedcore.EventsGetter, scaleNamespacer unversionedextensions.ScalesGetter, hpaNamespacer unversionedextensions.HorizontalPodAutoscalersGetter, metricsClient metrics.MetricsClient, resyncPeriod time.Duration) *HorizontalController {
+	broadcaster := record.NewBroadcaster()
+	broadcaster.StartRecordingToSink(&unversionedcore.EventSinkImpl{evtNamespacer.Events("")})
+	recorder := broadcaster.NewRecorder(api.EventSource{Component: "horizontal-pod-autoscaler"})
+
+	controller := &HorizontalController{
+		metricsClient:   metricsClient,
+		eventRecorder:   recorder,
+		scaleNamespacer: scaleNamespacer,
+		hpaNamespacer:   hpaNamespacer,
+	}
+	store, frameworkController := newInformer(controller, resyncPeriod)
+	controller.store = store
+	controller.controller = frameworkController
 
 	return controller
 }

pkg/controller/podautoscaler/horizontal_test.go

@@ -29,8 +29,10 @@ import (
 	_ "k8s.io/kubernetes/pkg/apimachinery/registered"
 	"k8s.io/kubernetes/pkg/apis/extensions"
 	"k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset/fake"
+	"k8s.io/kubernetes/pkg/client/record"
 	"k8s.io/kubernetes/pkg/client/restclient"
 	"k8s.io/kubernetes/pkg/client/testing/core"
+	unversionedcore "k8s.io/kubernetes/pkg/client/typed/generated/core/unversioned"
 	"k8s.io/kubernetes/pkg/client/unversioned/testclient"
 	"k8s.io/kubernetes/pkg/controller/podautoscaler/metrics"
 	"k8s.io/kubernetes/pkg/runtime"
@@ -329,13 +331,29 @@ func (tc *testCase) verifyResults(t *testing.T) {
 func (tc *testCase) runTest(t *testing.T) {
 	testClient := tc.prepareTestClient(t)
 	metricsClient := metrics.NewHeapsterMetricsClient(testClient, metrics.DefaultHeapsterNamespace, metrics.DefaultHeapsterScheme, metrics.DefaultHeapsterService, metrics.DefaultHeapsterPort)
-	hpaController := NewHorizontalController(testClient.Core(), testClient.Extensions(), testClient.Extensions(), metricsClient, 0)
+
+	broadcaster := record.NewBroadcasterForTests(0)
+	broadcaster.StartRecordingToSink(&unversionedcore.EventSinkImpl{testClient.Core().Events("")})
+	recorder := broadcaster.NewRecorder(api.EventSource{Component: "horizontal-pod-autoscaler"})
+
+	hpaController := &HorizontalController{
+		metricsClient:   metricsClient,
+		eventRecorder:   recorder,
+		scaleNamespacer: testClient.Extensions(),
+		hpaNamespacer:   testClient.Extensions(),
+	}
+
+	store, frameworkController := newInformer(hpaController, time.Minute)
+	hpaController.store = store
+	hpaController.controller = frameworkController
+
 	stop := make(chan struct{})
 	defer close(stop)
 	go hpaController.Run(stop)
+
 	if tc.verifyEvents {
 		// We need to wait for events to be broadcasted (sleep for longer than record.sleepDuration).
-		time.Sleep(12 * time.Second)
+		time.Sleep(2 * time.Second)
 	}
 	// Wait for HPA to be processed.
 	<-tc.processed