ScalaTest PlayFramework

Question

在学习playframework的同时尝试做一些TDD：

class ContentFetching extends PlaySpec with BeforeAndAfter with MockFactory
{
  private val service = ContentService

  private val languages = List(Language(Some(1), "en", "English", "Placeholder"),
                               Language(Some(2), "de", "Deutsch", "Platzhalter")
                              )

  "find" must
  {
    "fail if languageCode is invalid" in
    {
      val fakeRepository = mock[LanguageRepositoryTrait]
      (fakeRepository.get _).expects().returning(languages)

      fakeRepository.get must have length 3

      service.find("fr") must be Result.NotFound

    }
  }
}

ContentService 会调用：

def fourOhFour() = NotFound(s"Oops, content could not be found")

但断言service.find("fr") must be Result.NotFound 不会编译。为什么会这样以及如何测试呢？ 这是整个 contentService（根据要求） 遗憾的是它目前扩展了 Controller，因为我没有找到其他方法来返回 Action。实际上我使用 MVC，但也使用服务 + 存储库层：

class ContentServiceComponent(languageRepository: LanguageRepositoryTrait, nodeRepository: NodeRepositoryTrait) extends Controller
{
  def find(language: String) = Action
  {
    languageRepository.get().map(l => l.code).contains(language) match
    {
      case true => Ok(s"Homepage for $language")
      case false => fourOhFour()
    }
  }

  def fourOhFour() = NotFound(s"Oops, content could not be found")
}

object ContentService extends ContentServiceComponent(LanguageRepository, NodeRepository)

Answer 1

来自 Play 控制器的 service.find("fr") 返回一个结果

也许您正在将 Result 与 Result.Status 类型进行比较？

你能用play.api.helper吗？

status(of: Future[Result]) = Await.result(of, timeout.duration).header.status

代替

service.find("fr") must be Result.NotFound

试试这样的？

status(service.find("fr")) must be NOT_FOUND

NOT_FOUND 是一个 play.api.http.Status 值，只是映射到标准 HTTP 状态代码 404

Answer 2

find 改为返回 Action 可以返回 Option

def find(language: String): Option[String] =
  {
    languageRepository.get().map(l => l.code).contains(language) match
    {
      case true => Some(s"Homepage for $language")
      case _ => None
    }
  }

所以你可以在 Controller 中按如下方式处理它：

def index(language:String) = Action{

ContentService.find(language) match{
  case Some(content) => Ok(content)
  case _ => NotFound(s"Oops, content could not be found")
}

}

你可以做这样的测试用例：

class ContentFetching extends PlaySpec with BeforeAndAfter with MockFactory
{


  val languages = List(Language(Some(1), "en", "English",Placeholder"),Language(Some(2), "de", "Deutsch", "Platzhalter")
                              )

val languagesRepositoryMockHere = new LanguageRepositoryTrait{ 
    override def get =  languages  //I don't  know the implementations
}

  "find" must
  {
    "fail if languageCode is invalid" in
    {
       private val service = new ContentServiceComponent(languagesRepositoryMockHere,nodeRepositoryMockHere)


      service.find("fr") shouldBe None

    }
  }
}

这没有经过测试，但可以帮助参考。

干杯。