RestSpec.scala

class RestSpec extends WordSpec with Matchers with ScalatestRouteTest with MockitoSugar {

  val mockUserImpl = mock[UserImpl]

  object TestObject extends RestService {
    val userImpl = mockUserImpl
  }

  "The service" should {

    "return user added as response for a Post request to /adduser" in {
      when(mockUserImpl.addUser(User(2, "test"))).thenReturn(Future.successful(Done))
      
      val jsonRequest = ByteString(
        s"""
           |{
           |    "id":2,
           |    "name":"test"
           |}
        """.stripMargin)
      val postRequest = HttpRequest(
        HttpMethods.POST,
        uri = "/adduser",
        entity = HttpEntity(MediaTypes.`application/json`, jsonRequest))

      postRequest ~>  Route.seal(TestObject.route) ~> check {
        status.isSuccess() shouldEqual true
        responseAs[String] shouldEqual "user added"
      }
    }