单元测试 – Scala测试嘲笑隐含参数？

我有以下(简短版本)我的代码和测试：

实施(Scala 2.10,Spray和Akka)：

import spray.httpx.SprayJsonSupport._
import com.acme.ResultJsonFormat._

case class PerRequestIndexingActor(ctx: RequestContext) extends Actor with ActorLogging {
  def receive = LoggingReceive {
    case AddToIndexRequestCompleted(result) =>
      ctx.complete(result)
      context.stop(self)
  }
}


object ResultJsonFormat extends DefaultJsonProtocol {
  implicit val resultFormat = jsonFormat2(Result)
}

case class Result(code: Int,message: String)

测试(使用ScalaTest和Mockito)：

"Per Request Indexing Actor" should {
    "send the HTTP Response when AddToIndexRequestCompleted message is received" in {
      val request = mock[RequestContext]
      val result = mock[Result]

      val perRequestIndexingActor = TestActorRef(Props(new PerRequestIndexingActor(request)))
      perRequestIndexingActor ! AddToIndexRequestCompleted(result)

      verify(request).complete(result)
    }
  }

这行,verify(request).complete(result)使用隐式的Marshaller将Result转换成JSON.

我可以通过添加隐式val marshaller来引导编组：Marshaller [Result] = mock [Marshaller [Result]],但是当我运行测试时,使用了不同的Marshaller实例,因此验证失败.

即使明确地传递模拟马歇尔完成失败.

那么,任何人可以建议如何为隐式参数创建一个模拟对象,并确保该实例是使用的实例？