如何在Play Framework 2.2.0 Scala(spec2,Mockito)中对akka演员进行单元测试

Question

我正在尝试使用Play框架设置一些单元测试.我的很多逻辑都被构建到预定的akka​​演员中,这些演员在后台收集并收集数据.我的问题是我无法弄清楚如何对它们进行单元测试.我完全不知道如何处理它.我正在尝试使用akka-testkit,但我基本上都在喋喋不休.有没有人对如何接近它有任何建议？例子非常有用.这是我目前正在使用的憎恶的一个例子:

package test

import org.specs2.mutable._
import controllers.Scanner
import java.util.UUID
import org.joda.time.DateTime
import akka.testkit.TestActorRef
import play.api.Logger
import play.api.test.{FakeApplication, TestServer}
import models.PSqlEnum

class ScannerTest extends Specification {
  val appId = UUID.randomUUID()
  val app = models.App(appId, "TestApp", "TestServer", "TestComponent", "Test Description", DateTime.now(),
                       DateTime.now(), true, 3, 60, PSqlEnum("scanType", "mandatory"), "http://localhost")
  val rules = <Rule name="DivisionDataIsAvailable" elementsToCheck="DivisionDataIsAvailable"
                    ruleType="is, true, yellow" />
              <Rule name="DivisionDataLoadIsHealthy" elementsToCheck="DivisionDataLoadIsHealthy"
                    ruleType="is, true, red" />;

  "Scanner" should {
    "test something" in {
      val fakeApp = TestServer(3333)
      fakeApp.start()
      implicit val actorSystem = play.api.libs.concurrent.Akka.system(fakeApp.application)
      val scanner = TestActorRef(new Scanner(app, rules)).underlyingActor
      Logger.warn(scanner.getResponseFromWebService.toString)
      fakeApp.stop()
      1 === 1
    }
  }
}

这显然不是真正测试任何东西.我基本上试图让它在这一点上达到1 === 1只是为了看看我是否可以停止运行时错误.这段代码产生的错误是:

INFO  - Starting application default Akka system.
[info] ScannerTest
[info] Scanner should
[info] ! test something
[error]     ThrowableException: akka.actor.LocalActorRef.<init>(Lakka/actor/ActorSystemImpl;Lakka/actor/Props;Lakka/actor/InternalActorRef;Lakka/actor/ActorPath;)V (TestActorRef.scala:21)
[error] akka.testkit.TestActorRef.<init>(TestActorRef.scala:21)
[error] akka.testkit.TestActorRef$.apply(TestActorRef.scala:135)
[error] akka.testkit.TestActorRef$.apply(TestActorRef.scala:132)
[error] akka.testkit.TestActorRef$.apply(TestActorRef.scala:125)
[error] test.ScannerTest$$anonfun$1$$anonfun$apply$3.apply(ScannerTest.scala:27)
[error] test.ScannerTest$$anonfun$1$$anonfun$apply$3.apply(ScannerTest.scala:23)
[error] akka.actor.LocalActorRef.<init>(Lakka/actor/ActorSystemImpl;Lakka/actor/Props;Lakka/actor/InternalActorRef;Lakka/actor/ActorPath;)V
[error] akka.testkit.TestActorRef.<init>(TestActorRef.scala:21)
[error] akka.testkit.TestActorRef$.apply(TestActorRef.scala:135)
[error] akka.testkit.TestActorRef$.apply(TestActorRef.scala:132)
[error] akka.testkit.TestActorRef$.apply(TestActorRef.scala:125)
[error] test.ScannerTest$$anonfun$1$$anonfun$apply$3.apply(ScannerTest.scala:27)
[error] test.ScannerTest$$anonfun$1$$anonfun$apply$3.apply(ScannerTest.scala:23)
[info] Total for specification ScannerTest
[info] Finished in 86 ms
[info] 1 example, 0 failure, 1 error
[info] test.ScannerTest

我相信我需要创建一个FakeApplication并使用FakeApplication的Akka.system; 但是,我不知道该怎么做.说实话,我甚至不确定这是否是正确的方法.如果我能够生成一个通用的Akka.system并且有这项工作,我会欣喜若狂.如果有人对如何解决这个问题有任何想法我会非常感激.

Answer 1

好的,我明白了.确保使用的是正确版本的akka​​-testkit.在Play 2.2.0中,我试图使用akka 2.2.M3.显然,这不起作用.我必须在Build.scala中放入正确的依赖项,最终是这样的:

"com.typesafe.akka" %% "akka-testkit" % "2.2.0" % "test"

我的实际测试代码如下所示:

package test

import org.specs2.mutable._
import controllers.Scanner
import java.util.UUID
import org.joda.time.DateTime
import akka.testkit.TestActorRef
import play.api.Logger
import models.PSqlEnum
import akka.actor.ActorSystem
import com.typesafe.config.ConfigFactory
import scala.concurrent.ExecutionContext.Implicits.global

class ScannerTest extends Specification {
  val appId = UUID.randomUUID()
  val app = models.App(appId, "TestApp", "TestServer", "TestComponent", "Test Description", DateTime.now(),
                       DateTime.now(), true, 3, 60, PSqlEnum("scanType", "mandatory"), "http://localhost")
  val rules = <Rule name="DivisionDataIsAvailable" elementsToCheck="DivisionDataIsAvailable"
                    ruleType="is, true, yellow" />
              <Rule name="DivisionDataLoadIsHealthy" elementsToCheck="DivisionDataLoadIsHealthy"
                    ruleType="is, true, red" />;


  "Scanner" should {
    "test something" in {
      implicit val actorSystem = ActorSystem("testActorSystem", ConfigFactory.load())
      val scanner = TestActorRef(new Scanner(app, rules)).underlyingActor
      val response = scanner.getResponseFromWebService
      response onSuccess {
        case result => Logger.warn(result.toString)
      }
      response onFailure {
        case error => Logger.warn(error.toString)
      }
      1 === 1
    }
  }
}

显然,这个测试并没有真正做任何事情.正在评估的实际测试是1 === 1.它现在打印到日志,这意味着我可以返回并验证数据类型和响应的有效负载,然后构建一些实际的单元测试.我希望有人觉得这很有用.原始问题中的那些错误消息是由akka-testkit依赖项与Akka的版本不同引起的,这可能对某些人有用.