Could not get the underlyingActor for TestActorRef

[Harit Himanshu]

Hey there,

This is what my actor looks like  

object Runner {
  def props(race: Race) = Props(classOf[Runner], race)
}

class Runner(race: Race) extends Actor with ActorLogging {

  import context.dispatcher

  @throws[Exception](classOf[Exception])
  override def postRestart(reason: Throwable): Unit = context.parent ! RestartRunner

  override def receive: Receive = LoggingReceive {
    case Start => {
      log.debug("running...")
      for (i <- 1 to 3) {
        Thread.sleep(200)
      }
      throw new RuntimeException("MarathonRunner is tired")
    }

    case StartWithFuture =>
      log.debug("I am starting to run")
      race.start pipeTo self

    case Failure(throwable) => throw throwable

    case Stop =>
      log.debug("stopping runner")
      context.stop(self)
  }
}

and this is what my test looks

import akka.actor.{Props, ActorSystem}
import akka.testkit.{TestActorRef, TestKit}
import org.scalatest._

class RunnerSpec extends TestKit(ActorSystem("test"))
with WordSpecLike
with MustMatchers {
  "A Runner Actor" must {
    val runner = TestActorRef(Props(new Runner(new Marathon)))
    "receive messages" in {
      runner ! Start
      runner.under <== says Nothing (see attachment)
    }
  }
}

So, when I try to get the underlyingActor, I get `Nothing`, what is wrong here?

Thanks a lot

[Martynas Mickevičius]

Hi Harit,

as you are passing in Props to the TestActorRef apply method, you will have to specify type of your actor because Props do not have a type parameter:

val runner = TestActorRef[Runner](Props(new Runner(new Marathon)))

Alternatively, you can use a different TestActorRef apply method that accepts a code thunk that returns a new instance of your actor:

val runner = TestActorRef(new Runner(new Marathon))

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Martynas Mickevičius

Typesafe – Reactive Apps on the JVM

[Harit Himanshu]

Thank you Martynas, that works

+ Harit

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