TestProbe() and actorSelection

[Kostas kougios]

Hi, I am trying to test actor code that uses actorSelection:

val path = RootActorPath(member.address, name = "/user/clusterKeeper")
context.actorSelection(path).resolveOne(5 seconds).foreach {
    clusterKeeper =>
      clusterKeeper ! msg
}

member.address comes from akka clusters and has the address of the remote actor.

Now I need to mock/probe the clusterKeeper actor but TestProbe() doesn't have a way of defining the name of the actor or it's path. In fact it goes down to TestKitBase where it is hardcoded:

val testActor: ActorRef = {
  val impl = system.asInstanceOf[ExtendedActorSystem]
  val ref = impl.systemActorOf(TestActor.props(queue)
    .withDispatcher(CallingThreadDispatcher.Id),
    "testActor" + TestKit.testActorId.incrementAndGet)
  awaitCond(ref match {
    case r: RepointableRef ⇒ r.isStarted
    case _                 ⇒ true
  }, 1 second, 10 millis)
  ref
}

Is there a way with the testkit to test this? Ofcourse I could create an actor myself but then I would have to reimpl all expectMsg or maybe have it forward the messages to testkit.

Similar post :
https://groups.google.com/forum/#!searchin/akka-user/testprobe$20actorSelection/akka-user/ETL4XQr1Sj4/N9lo_6gc8voJ

[Patrik Nordwall]

I would start an actor on that path that forwards all messages to the test probe.

/Patrik

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Patrik Nordwall
Typesafe -  Reactive apps on the JVM
Twitter: @patriknw

[Konstantinos Kougios]

Thanks Patrik, I actually thought of that too but was wondering if there is any testkit support for it. Then ended up impl a test-only actor that gathers all received messages and my test suite can get them as a stream (blocking if the stream is empty in order to wait for the threading bit to work). Since this is a normal actor, I can create it as I wish and also I can assert on the messages via normal testActor.messages should contain(). I am in the process of writing that code and will replace some of my testcases/TestProbe's with it.

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[Patrik Nordwall]

The forwarding actor is actually included in akka.testkit.TestActors.ForwardActor in Akka 2.4-M1.

/Patrik

[Konstantinos Kougios]

nice