Question

I have the following actor for which I would like to create unit tests to verify the following behaviour:

1. ListeningActor correctly registers itself to watch the listeningTo actor.
2. ListeningActor correctly kills itself when the listeningTo actor terminates.

How can I verify these two behaviours?

I am using Akka 2.0.2 with Java.

Thanks

public class ListeningActor extends UntypedActor {
    private final ActorRef listeningTo;

    public ListeningActor(final ActorRef listeningTo) {
        this.listeningTo = listeningTo;
    }

    @Override
    public void preStart() {
        super.preStart();
        context().watch(listeningTo);          // <---- To verify
    }

    @Override
    public void onReceive(final Object o) throws Exception {
        if (o instanceof Terminated) {
            Terminated terminated = (Terminated) o;
            if (terminated.equals(listeningTo)) {
                context().stop(self());        // <---- To verify
            }
        } else {
            unhandled(o);
        }
    }
}

Answer 1

Watch the ListenerActor with the testActor from TestKit, then expect the ListenerActor to be Terminated when you PoisonPill and-or stop an actor it listens to. Done.