java - 在 Play 2.5.x 中找不到类 play.api.cache.CacheApi 的构造函数

Question

package test

import javax.inject._
import org.specs2.mutable._
import play.api.test.Helpers._
import play.api.test._
import play.api.libs.json._
import play.api.cache._
import akka.stream._
import akka.actor._
import akka.actor.Actor
import akka.actor.ActorSystem
import akka.actor.ActorRef
import akka.actor.Props
import akka.pattern.ask
import models.MyWebSocketActor
import scala.collection.mutable.Map 
import org.specs2.mock._
import play.api.mvc._

class ValidateMethodTest @Inject() (cache: CacheApi) extends Specification with Mockito {





  val system = ActorSystem("MockActorSystem")
  val mockMap : Map[ActorRef , String] = Map()


  "validator method" should {

      "check username key" in {

        /*with no username key */
  val testMsg1 =  Json.parse("""{"message":"Testing Message" ,"conn_status" : 2 , "pub_key":"empty", "target":"all"}""")

 val actor1 = system.actorOf(Props[MyWebSocketActor],"actor1")



  val actor2 = system.actorOf(Props[MyWebSocketActor],"actor2")




  val mockObject1 = new MyWebSocketActor(actor1,actor2,cache,mockMap)

  val ( mockReturnMsg, mockReturnCode, mockPub_key) = mockObject1.validate(testMsg1)


     mockReturnCode must equalTo(500) 
    }

  }


}

我正在对类(MyWebSocketActor)中的特定方法(验证)进行单元测试，该方法接受缓存作为其参数之一。

为此，我需要创建一个 Cache 实例。 play.api.cache.CacheApi 是一个特征，因此无法实例化。所以我用 @Inject 在这个单元类中传递 (cache:CacheApi) 。但它给出了错误消息:找不到类 play.api.cache.CacheApi 的构造函数。我正在使用 Play 2.5.3 和 scala 2.11.x 。

Answer 1

您需要模拟CacheApi(或以其他方式创建它)，而不是使用依赖项注入(inject)。

Play Documentation有一个关于如何执行此操作的很好的示例:

import org.specs2.mock._
import org.specs2.mutable._

import java.util._

class ExampleMockitoSpec extends Specification with Mockito {

  "MyService#isDailyData" should {
    "return true if the data is from today" in {
      val mockDataService = mock[DataService]
      mockDataService.findData returns Data(retrievalDate = new java.util.Date())

      val myService = new MyService() {
        override def dataService = mockDataService
      }

      val actual = myService.isDailyData
      actual must equalTo(true)
    }
  }

}