Mockito可以處理在Scala中返回泛型的方法嗎？

Question

我想嘲笑javax.servlet.http.HttpServletRequest, getParameterNames()的回報。因此：

import org.specs.Specification 
import org.specs.mock.Mockito 
import scala.collection.JavaConversions._ 
import javax.servlet.http.HttpServletRequest 

object SomethingSpec extends Specification with Mockito { 
    "Something" should { 
     "do something" in { 
      val request = mock[HttpServletRequest] 

      // This is fine 
      val elements: java.util.Enumeration[String] = List("p1", "p2").iterator 

      // But this bombs 
      request.getParameterNames() return elements 
     } 
    } 
} 

在這個難以明白錯誤的最後一行成果彙編：

found : java.util.Enumeration[String] 
required: java.util.Enumeration[?0] where type ?0 

難道我做錯了什麼？

Answer 1

你試圖將來自HttpServletRequest將返回值一樣

request.getParameterNames().asInstanceOf[java.util.Enumeration[String]] returns elements 

看來，getParameterNames返回一個類型化的枚舉。