在我的服务中尝试伪造服务器调用时获取方案 java.lang.NullPointerException: 方案

Question

我的项目中有一项服务 class，我想测试其中一种执行 api 调用的方法，因此我想捕获此调用并 return一些假的所以我可以测试我的方法，它看起来像这样：

class MyService @Inject()(implicit config: Configuration, wsClient: WSClient) {

  def methodToTest(list: List[String]): Future[Either[BadRequestResponse, Unit]] = {
    wsClient.url(url).withHeaders(("Content-Type", "application/json")).post(write(list)).map { response =>
      response.status match {
        case Status.OK =>
          Right(logger.debug("Everything is OK!"))
        case Status.BAD_REQUEST =>
          Left(parse(response.body).extract[BadRequestResponse])
        case _ =>
          val ex = new RuntimeException(s"Failed with status: ${response.status} body: ${response.body}")
          logger.error(s"Service failed: ", ex)
          throw ex
      }
    }
  }
}

现在在我的测试中class我去：

class MyServiceTest extends FreeSpec with ShouldMatchers with OneAppPerSuite with ScalaFutures with WsScalaTestClient {

  implicit lazy val materializer: Materializer = app.materializer
  lazy val config: Configuration = app.injector.instanceOf[Configuration]
  lazy val myService = app.injector.instanceOf[MyService]

  "My Service Tests" - {

    "Should behave as im expecting" in {
      Server.withRouter() {
        case POST(p"/fake/api/in/conf") => Action { request =>
          Results.Ok
        }
      } { implicit port =>
        WsTestClient.withClient { implicit client =>

          whenReady(myService.methodToTest(List("1","2","3"))) { res =>
            res.isRight shouldBe true
          }
        }
      }
    }
  }
}

我得到这个错误：

scheme java.lang.NullPointerException: scheme

也试过放在 client 下 => :

val myService = new MyService {
         implicit val config: Configuration = configuration
         implicit val ws: WSClient = client
      }

但是出现了一些其他错误，我在构造函数中没有足够的参数...

为什么它不起作用？

如果有更好更简单的方法来伪造这个 api 电话，我很想听听:)

谢谢！

Answer 1

Server.withRouter 可能不是您想要的。它创建一个服务器并将其绑定到每个实例的随机端口（除非您指定端口）。它还会创建自己的应用程序实例，该实例将与您用来实例化该服务的应用程序断开连接。

另一件事是注入的 WSClient 不相对于您的应用程序起作用。您需要使用传递给 WsTestClient.withClient 块的 client 代替。所以，你应该这样做：

class MyServiceTest extends FreeSpec with ShouldMatchers with OneAppPerSuite with ScalaFutures with WsScalaTestClient {

  implicit lazy val materializer: Materializer = app.materializer
  lazy val config: Configuration = app.injector.instanceOf[Configuration]

  "My Service Tests" - {

    "Should behave as im expecting" in {
      Server.withRouter() {
        case POST(p"/fake/api/in/conf") => Action { request =>
          Results.Ok
        }
      } { implicit port =>
        WsTestClient.withClient { implicit client =>

          // Use the client "instrumented" by Play. It will
          // handle the relative aspect of the url.
          val myService = new MyService(client, config)

          whenReady(myService.methodToTest(List("1","2","3"))) { res =>
            res.isRight shouldBe true
          }
        }
      }
    }
  }
}

在我的服务中尝试伪造服务器调用时获取方案 java.lang.NullPointerException: 方案

getting scheme java.lang.NullPointerException: scheme while trying to fake a server call in my service

scala

scalatest

playframework