Scala Reactive Programming

Unit testing HelloWorldActor (Version 2)

Now let's unit test our HelloWorldActor version 2 which is available at com.packt.publishing.reactive.hello.actor.v2 package name:

class HelloWorldActorSpec(actorSystem: ActorSystem) extends  TestKit(actorSystem) with Matchers with WordSpecLike with BeforeAndAfterAll { 
 
  def this() = this(ActorSystem("AkkaHelloWorld")) 
 
  "HelloWorld Actor" should { 
      "pass on a HelloWorld message" in { 
        val testProbe = TestProbe() 
        val helloWorldActor = system.actorOf(Props(new         HelloWorldActor(testProbe.ref)), "HelloWorldActor") 
        helloWorldActor ! HelloWorld 
        testProbe.expectMsg(500 millis, HelloWorld) 
      } 
  } 
  override def afterAll: Unit = { 
    shutdown(system)   }}

Let us understand the preceding Test spec here:

• As our HelloWorldActor ...