scala - 创建 TestActorRef 导致 NullPointerException

Question

我正在尝试获得这样的 TestActorRef

class NotifySenderTest(_system: ActorSystem) extends TestKit(_system) with ImplicitSender with WordSpecLike with Matchers with BeforeAndAfterAll with BeforeAndAfter {

  def this() = this(ActorSystem("NotifySenderTest"))
  override def afterAll {
    TestKit.shutdownActorSystem(system)
  }

  "A NotifySender" must {
    "be able to process the required messages" in {
      val actorRef = TestActorRef[NotifySender] //Line 92
    }
  }

这个 Actor

class NotifySender extends Actor with Stash {
  import Tcp._
  import context.system

  def receive = {
  [...]
  }
}

但这给我留下了以下堆栈跟踪

java.lang.NullPointerException: at akka.actor.dungeon.Dispatch$class.init(Dispatch.scala:62) at akka.actor.ActorCell.init(ActorCell.scala:338) at akka.actor.LocalActorRef.(ActorRef.scala:304) at akka.testkit.TestActorRef.(TestActorRef.scala:21) at akka.testkit.TestActorRef$.apply(TestActorRef.scala:141) at akka.testkit.TestActorRef$.apply(TestActorRef.scala:137) at akka.testkit.TestActorRef$.apply(TestActorRef.scala:146) at akka.testkit.TestActorRef$.apply(TestActorRef.scala:144) at actor.NotifySenderTest$$anonfun$2$$anonfun$apply$mcV$sp$4.apply$mcV$sp(NotifySenderTest.scala:92) at actor.NotifySenderTest$$anonfun$2$$anonfun$apply$mcV$sp$4.apply(NotifySenderTest.scala:91) ...

编辑:这似乎与这个 Actor 特别有关。获取另一个 actor 类的 TestActorRef 工作正常。我读到，对于具有 Stash 特征的 actor，TextActorRefs 存在问题，但据说在当前版本中已解决。 ( Reference )

Edit2:好的。我错了。当前版本不是 2.3。所以我必须等待？!

Answer 1

已验证升级到 akka 2.3.0是使用 Stash 特性修复 TestActorRef 的正确答案。