Mockito fun 1

gistfile1.scala

import org.mockito.Mockito._
import org.scalatest.mock.MockitoSugar
import org.mockito.Matchers

object MockitoFun1 extends App with MockitoSugar{

  trait X{
    def x
  }

  trait Y{
    def y : Int
  }

  val xy = mock[X with Y]
  when(xy.y) thenReturn 8
}

Exception in thread "main" java.lang.ClassCastException: akka.camel.MockitoFun1$X$$EnhancerByMockitoWithCGLIB$$e1d7d41 cannot be cast to akka.camel.MockitoFun1$Y