将Iteratee转换为结果 [英] convert Iteratee to Result

问题描述

我正在为我的游戏应用程序控制器编写测试用例，但无法获得操作结果.

I am writing test-cases for my play application controller, and I am having trouble getting the action result.

val jsonresult = UserController.importOPML()( 
   FakeRequest(POST, "/user/import-opml",FakeHeaders(),data)
   .withCookies(cookie) 
)

这仅在将Action指定为parse.multipartFormData时有效，如果将其更改为parse.json

this would work only when the Action is specified parse.multipartFormData, if it is changed to parse.json

类型不匹配；找到:play.api.libs.iteratee.Iteratee [Array [Byte]，play.api.mvc.SimpleResult]必需: scala.concurrent.Future [play.api.mvc.SimpleResult]

type mismatch; found : play.api.libs.iteratee.Iteratee[Array[Byte],play.api.mvc.SimpleResult] required: scala.concurrent.Future[play.api.mvc.SimpleResult]

我不知道为什么，所以我改成

I don't know why , so I changed to

val Some(jsonresult ) = route( request )

这次编译可以通过，但是我的身份验证存根不能再通过.是什么导致该奇怪的错误?以及如果使用路由，为什么cookie不起作用.

this time the compilation can pass, but my Authentication stub cannot pass anymore. what is causing that weird error ? and if work with route, why the cookie didn't work.

推荐答案

之所以会出现此问题，是因为play.api.mvc.Action[A]包含以下两个apply方法:

This problem arises because play.api.mvc.Action[A] contains these two apply methods:

// What you're hoping for
def apply(request: Request[A]): Future[Result]

// What actually gets called
def apply(rh: RequestHeader): Iteratee[Array[Byte], Result]

Request[A] extends RequestHeader，因此在这种情况下，A发挥了所有作用.如果它与操作不匹配，则会调用错误的方法.

Request[A] extends RequestHeader, so the A in this case makes all the difference. If it doesn't match the action, you'll call the wrong method.

如果您的操作是Action[AnyContent]，则必须传递Request[AnyContent]-Request[AnyContentAsJson]可以，但是FakeRequest[JsValue]无效，因为只有前者是Request[AnyContent].

If your action is a Action[AnyContent], then you must pass a Request[AnyContent] - Request[AnyContentAsJson] will work, but FakeRequest[JsValue] won't, because only the former is a Request[AnyContent].

当将ActionBuilder与BodyParser[A]一起使用时，将创建一个Action[A].结果，您需要一个Request[A]进行测试，这意味着问题中data的类型至关重要.

When you use ActionBuilder with a BodyParser[A], you create an Action[A]. As a result, you'll need a Request[A] to test, which means that the type of data in your question is critically important.

• parse.json返回BodyParser[JsValue]，因此data必须是JsValue
• parse.multipartFormData返回一个BodyParser[MultipartFormData[TemporaryFile]]，因此data必须是多部分表单数据.

• parse.json returns a BodyParser[JsValue], so data must be a JsValue
• parse.multipartFormData returns a BodyParser[MultipartFormData[TemporaryFile]], so data must be multi-part form data.

(注意:自从您问这个问题已经有一段时间了，所以我是使用Play 2.3而不是您被问到的2.2来回答这个问题的.)

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