Function ExampleNewInformer

tools/cache/controller_test.go:123–178

()

}

func ExampleNewInformer() {
	// source simulates an apiserver object endpoint.
	source := fcache.NewFakeControllerSource()

	// Let's do threadsafe output to get predictable test results.
	deletionCounter := make(chan string, 1000)

	// Make a controller that immediately deletes anything added to it, and
	// logs anything deleted.
	_, controller := NewInformer(
		source,
		&v1.Pod{},
		time.Millisecond*100,
		ResourceEventHandlerFuncs{
			AddFunc: func(obj interface{}) {
				source.Delete(obj.(runtime.Object))
			},
			DeleteFunc: func(obj interface{}) {
				key, err := DeletionHandlingMetaNamespaceKeyFunc(obj)
				if err != nil {
					key = "oops something went wrong with the key"
				}

				// Report this deletion.
				deletionCounter <- key
			},
		},
	)

	// Run the controller and run it until we close stop.
	stop := make(chan struct{})
	defer close(stop)
	go controller.Run(stop)

	// Let's add a few objects to the source.
	testIDs := []string{"a-hello", "b-controller", "c-framework"}
	for _, name := range testIDs {
		// Note that these pods are not valid-- the fake source doesn't
		// call validation or anything.
		source.Add(&v1.Pod{ObjectMeta: metav1.ObjectMeta{Name: name}})
	}

	// Let's wait for the controller to process the things we just added.
	outputSet := sets.String{}
	for i := 0; i < len(testIDs); i++ {
		outputSet.Insert(<-deletionCounter)
	}

	for _, key := range outputSet.List() {
		fmt.Println(key)
	}
	// Output:
	// a-hello
	// b-controller
	// c-framework
}

func TestHammerController(t *testing.T) {