scala - child Actor 终止确认

我有以下演员层次结构父->子->工人
在儿童的生活范围难以要求的地方-请求完成后，应终止儿童演员。我想在测试中进行验证。我创建StepParent的目的是为了进行测试，因为我想验证给定请求的响应，该请求将转发到msg到testprobe。

class StepParent(child: Props, name: String, probe: ActorRef) extends Actor with ActorLogging {
  context.watch(context.actorOf(props = child, name = name))

  override def receive: Actor.Receive = {
    case msg: PersistImages => context.children.foreach(child => child.tell(msg, sender))
    case msg =>
      log.debug(s"Msg forwarded to probe $msg")
      probe.tell(msg, sender)
  }
}

我的测试如下所示：

class ImagesControllerActorTest extends TestKit(ActorSystem("testsystem"))
with WordSpecLike with MustMatchers with StopSystemAfterAll {

  val id = "456"

  "ControllerActor" must {
    "distribute a work to dedicated dedicated workers and combine back results and then terminate" in {

      val p = TestProbe()
      val ica = system.actorOf(Props(classOf[StepParent], createActorWithMockedWorkers(id, p.ref), "ControllerActor", p.ref), "parent")

      p.send(ica, PersistImages(Set(new URL("http://success"), new URL("http://fail"))))

      p.expectMsgPF(2 seconds)(validMsgPersistImageActor)
      p.expectMsgPF(2 seconds)(validMsgPersistImageActor)

      p.expectMsg(2 seconds, ImagesProcessed(id, Set(new URI("file:/"))))

      p.expectMsg(4 seconds, Terminated)
    }
  }

我的测试失败，因为最后检查了预期的消息：

assertion failed: timeout (4 seconds) during expectMsg while waiting for Terminated
java.lang.AssertionError: assertion failed: timeout (4 seconds) during expectMsg while waiting for Terminated
    at scala.Predef$.assert(Predef.scala:179)
    at akka.testkit.TestKitBase$class.expectMsg_internal(TestKit.scala:338)
...

根据详细日志，也会转发终止的味精（如最后一行所示）

2015-01-11 17:41:10,386 [WARN ] [testsystem-akka.actor.default-dispatcher-5] akka.tcp://[email protected]:2555/user/parent/ControllerActor - id: 456 image url: http://fail FAILED
2015-01-11 17:41:10,386 [INFO ] [testsystem-akka.actor.default-dispatcher-5] akka.tcp://[email protected]:2555/user/parent/ControllerActor - id: 456 Processing completed with 1 downloded and 1 failed
2015-01-11 17:41:10,387 [DEBUG] [testsystem-akka.actor.default-dispatcher-4] akka.tcp://[email protected]:2555/user/parent - Msg forwarded to probe ImagesProcessed(456,Set(file:/))
2015-01-11 17:41:10,392 [DEBUG] [testsystem-akka.actor.default-dispatcher-2] akka://testsystem/user/parent/ControllerActor/$b - stopped
2015-01-11 17:41:10,394 [DEBUG] [testsystem-akka.actor.default-dispatcher-5] akka://testsystem/user/parent/ControllerActor - stopping
2015-01-11 17:41:10,396 [INFO ] [testsystem-akka.actor.default-dispatcher-4] akka://testsystem/user/parent/ControllerActor/$b - Message [akka.dispatch.sysmsg.Terminate] from Actor[akka://testsystem/user/parent/ImagesControllerActor/$b#-426862126] to Actor[akka://testsystem/user/parent/ControllerActor/$b#-426862126] was not delivered. [1] dead letters encountered. This logging can be turned off or adjusted with configuration settings 'akka.log-dead-letters' and 'akka.log-dead-letters-during-shutdown'.
2015-01-11 17:41:10,396 [INFO ] [testsystem-akka.actor.default-dispatcher-2] akka://testsystem/user/parent/ControllerActor/$a - Message [akka.dispatch.sysmsg.Terminate] from Actor[akka://testsystem/user/parent/ControllerActor/$a#1067345522] to Actor[akka://testsystem/user/parent/ControllerActor/$a#1067345522] was not delivered. [2] dead letters encountered. This logging can be turned off or adjusted with configuration settings 'akka.log-dead-letters' and 'akka.log-dead-letters-during-shutdown'.
2015-01-11 17:41:10,398 [DEBUG] [testsystem-akka.actor.default-dispatcher-2] akka://testsystem/user/parent/ControllerActor - stopped
2015-01-11 17:41:10,399 [DEBUG] [testsystem-akka.actor.default-dispatcher-16] akka://testsystem/user/parent/ControllerActor/$a - stopped
2015-01-11 17:41:10,399 [DEBUG] [testsystem-akka.actor.default-dispatcher-5] akka://testsystem/user/parent - received AutoReceiveMessage Envelope(Terminated(Actor[akka://testsystem/user/parent/ControllerActor#-770422232]),Actor[akka://testsystem/user/parent/ControllerActor#-770422232])
**2015-01-11 17:41:10,400 [DEBUG] [testsystem-akka.actor.default-dispatcher-5] akka.tcp://[email protected]:2555/user/parent - Msg forwarded to probe Terminated(Actor[akka://testsystem/user/parent/ControllerActor#-770422232])**
...

我真的不明白为什么最后的ExpectedMsg检查在这里不起作用，因为该消息照常转发。自动收到的邮件有什么特殊处理吗？

有人可以请一些棚屋吗？

谢谢

更新：
尝试按照建议解决此问题-删除包装封套，如下所示：

class StepParent(child: Props, name: String, probe: ActorRef) extends Actor with ActorLogging {
  context.watch(context.actorOf(props = child, name = name))

  override def receive: Actor.Receive = {
    case msg: PersistImages => context.children.foreach(child => child.tell(msg, sender))
    case mssg: Envelope =>
      log.debug(s"Envelope msg forwarded to probe $mssg")
      probe.tell(mssg.message, sender)
    case msg =>
      log.debug(s"Msg forwarded to probe $msg")
      probe.tell(msg, sender)
  }
}

2015-01-11 23:52:16,352 [DEBUG] [testsystem-akka.actor.default-dispatcher-4] akka://testsystem/user/parent/ControllerActor - stopping
2015-01-11 23:52:16,354 [DEBUG] [testsystem-akka.actor.default-dispatcher-4] akka://testsystem/user/parent/ControllerActor - stopped
2015-01-11 23:52:16,358 [DEBUG] [testsystem-akka.actor.default-dispatcher-16] akka.tcp://[email protected]:2555/user/parent - Msg forwarded to probe ImagesProcessed(456,Set(file:/))
2015-01-11 23:52:16,358 [DEBUG] [testsystem-akka.actor.default-dispatcher-16] akka://testsystem/user/parent - received AutoReceiveMessage Envelope(Terminated(Actor[akka://testsystem/user/parent/ControllerActor#-1965336139]),Actor[akka://testsystem/user/parent/ControllerActor#-1965336139])
2015-01-11 23:52:16,360 [DEBUG] [testsystem-akka.actor.default-dispatcher-16] akka.tcp://[email protected]:2555/user/parent - Msg forwarded to probe Terminated(Actor[akka://testsystem/user/parent/ControllerActor#-1965336139])
2015-01-11 23:52:16,365 [DEBUG] [testsystem-akka.actor.default-dispatcher-16] akka://testsystem/system/testActor2 - received AutoReceiveMessage Envelope(Terminated(Actor[akka://testsystem/user/parent/ControllerActor#-1965336139]),Actor[akka://testsystem/user/parent/ControllerActor#-1965336139])

它仍然失败，似乎这里发生了一些可疑的事情：

2015-01-11 23:52:16,360 [DEBUG] [testsystem-akka.actor.default-dispatcher-16] akka.tcp://[email protected]:2555/user/parent - Msg forwarded to probe Terminated(Actor[akka://testsystem/user/parent/ImagesControllerActor#-1965336139])

那不是来自StepParent的正确消息，但是它以某种方式被提取了。

最佳答案

StepParent实际上收到Envelope消息的Terminated。

您可以从日志中看到它：

2015-01-11 17:41:10,399 [DEBUG] [testsystem-akka.actor.default-dispatcher-5] akka://testsystem/user/parent - received AutoReceiveMessage Envelope(Terminated(Actor[akka://testsystem/user/parent/ControllerActor#-770422232]),Actor[akka://testsystem/user/parent/ControllerActor#-770422232])

但是，Envelope消息然后会打印在您的日志中，就像不是Terminated一样。

该消息是Envelope，以便包含自动发送的消息中的发件人元数据，即使在这种情况下，Terminated消息已包含发件人信息。

因此，要使测试通过，您可以执行以下操作：

override def receive: Actor.Receive = {
  case msg: PersistImages => context.children.foreach(child => child.tell(msg, sender))
  case msg: Envelope =>
    log.debug(s"Envelope msg forwarded to probe $msg")
    probe.tell(msg.message, sender)
  case msg =>
    log.debug(s"Msg forwarded to probe $msg")
    probe.tell(msg, sender)
}