Examples of akka.testkit.JavaTestKit

akka.testkit.JavaTestKit
Java API: Test kit for testing actors. Inheriting from this class enables reception of replies from actors, which are queued by an internal actor and can be examined using the expectMsg... methods. Assertions and bounds concerning timing are available in the form of Within blocks.
Beware of two points:
- the ActorSystem passed into the constructor needs to be shutdown, otherwise thread pools and memory will be leaked - this trait is not thread-safe (only one actor with one queue, one stack of Within blocks); take care not to run tests within a single test class instance in parallel.
- It should be noted that for CI servers and the like all maximum Durations are scaled using the dilated method, which uses the TestKitExtension.Settings.TestTimeFactor settable via akka.conf entry "akka.test.timefactor".

    }
  }


  @Test
  public void contextActorOf() {
    new JavaTestKit(system) {
      {
        //#context-actorOf
        class A extends UntypedActor {
          final ActorRef child =
              getContext().actorOf(Props.create(MyUntypedActor.class), "myChild");

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    // ActorSystem is a heavy object: create only one per application
    final ActorSystem system = ActorSystem.create("MySystem", config);
    final ActorRef myActor = system.actorOf(Props.create(MyActor.class), "myactor");
    //#system-actorOf
    try {
      new JavaTestKit(system) {
        {
          myActor.tell("hello", getRef());
          expectMsgEquals("hello");
        }
      };

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    final ActorRef myActor = getContext().actorOf(
      Props.create(DependencyInjector.class, applicationContext, "MyActor"),
        "myactor3");
    //#creating-indirectly
    new JavaTestKit(system) {
      {
        myActor.tell("hello", getRef());
        expectMsgEquals("...");
      }
    };

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  //#receive-timeout


  @Test
  public void using_receiveTimeout() {
    final ActorRef myActor = system.actorOf(Props.create(ReceiveTimeoutActor.class));
    new JavaTestKit(system) {
      {
        myActor.tell("Hello", getRef());
        expectMsgEquals("Hello world");
        expectMsgEquals("timeout");
      }

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  }


  @Test
  public void receiveTimeout() {
    final ActorRef myActor = system.actorOf(Props.create(MyReceiveTimeoutUntypedActor.class));
    new JavaTestKit(system) {
      {
        new Within(Duration.create(1, TimeUnit.SECONDS), Duration.create(1500,
            TimeUnit.MILLISECONDS)) {
          @Override
          protected void run() {

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  }


  @Test
  public void usePoisonPill() {
    final ActorRef myActor = system.actorOf(Props.create(MyUntypedActor.class));
    new JavaTestKit(system) {
      {
        final ActorRef sender = getRef();
        //#poison-pill
        myActor.tell(akka.actor.PoisonPill.getInstance(), sender);
        //#poison-pill

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  //#hot-swap-actor


  @Test
  public void using_hot_swap() {
    final ActorRef actor = system.actorOf(Props.create(HotSwapActor.class), "hot");
    new JavaTestKit(system) {
      {
        actor.tell("foo", getRef());
        actor.tell("foo", getRef());
        expectMsgEquals("I am already angry?");
        actor.tell("bar", getRef());

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  @Test
  public void using_watch() {
    ActorRef actor = system.actorOf(Props.create(WatchActor.class));


    new JavaTestKit(system) {
      {
        actor.tell("kill", getRef());
        expectMsgEquals("finished");
      }
    };

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    };
  }


  @Test
  public void useKill() {
    new JavaTestKit(system) {
      {
        class Master extends UntypedActor {
          private SupervisorStrategy strategy = new OneForOneStrategy(-1,
              Duration.Undefined(), new Function<Throwable, Directive>() {
            @Override

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  @Test
  public void using_Identify() {
    ActorRef a = system.actorOf(Props.empty());
    ActorRef b = system.actorOf(Props.create(Follower.class));


    new JavaTestKit(system) {
      {
        watch(b);
        system.stop(a);
        assertEquals(expectMsgClass(Duration.create(2, TimeUnit.SECONDS), Terminated.class).actor(), b);
      }

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