如何使用Mockito在Scala对象中模拟一个函数？

发布时间：2020-12-16 18:44:29 所属栏目：安全来源：网络整理

导读：我是 Scala的新手.我试图使用Mockito模拟一个简单的Scala函数,但是我收到以下错误.我检查了互联网,但我无法找出错误. object TempScalaService { def login(userName: String,password: String): Boolean = { if (userName.equals("root") password.equals("

我是 Scala的新手.我试图使用Mockito模拟一个简单的Scala函数,但是我收到以下错误.我检查了互联网,但我无法找出错误.

object TempScalaService {
  def login(userName: String,password: String): Boolean = {
    if (userName.equals("root") && password.equals("admin123")) {
      return true
    }
    else return false
  }
}

我的测试课程如下

class TempScalaServiceTest extends FunSuite with MockitoSugar{

  test ("test login "){
    val service = mock[TempScalaService.type]
    when(service.login("user","testuser")).thenReturn(true)
    //some implementation
  }
}

但是我收到以下错误：

Cannot mock/spy class     com.pearson.tellurium.analytics.aggregation.TempScalaService$
Mockito cannot mock/spy following:
- final classes
- anonymous classes
- primitive types
org.mockito.exceptions.base.MockitoException: 
Cannot mock/spy class    com.pearson.tellurium.analytics.aggregation.TempScalaService$
Mockito cannot mock/spy following:
- final classes
- anonymous classes
- primitive types
   at  org.scalatest.mock.MockitoSugar$class.mock(MockitoSugar.scala:74)
    at    com.pearson.tellurium.analytics.aggregation.TempScalaServiceTest.mock(Temp    ScalaServiceTest.scala:7)
at     com.pearson.tellurium.analytics.aggregation.TempScalaServiceTest$$anonfun$   1.apply$mcV$sp(TempScalaServiceTest.scala:10)
    at    com.pearson.tellurium.analytics.aggregation.TempScalaServiceTest$$anonfun$   1.apply(TempScalaServiceTest.scala:9)
    at     com.pearson.tellurium.analytics.aggregation.TempScalaServiceTest$$anonfun$   1.apply(TempScalaServiceTest.scala:9)
    at    org.scalatest.Transformer$$anonfun$apply$1.apply$mcV$sp(Transformer.scala:    22)
    at org.scalatest.OutcomeOf$class.outcomeOf(OutcomeOf.scala:85)

解决方法

您无法模拟对象,尝试将代码移动到类：

class TempScalaService() {
  def login(userName: String,password: String): Boolean = {
    if (userName.equals("root") && password.equals("admin123")) {
      return true
    }
    else return false
  }
}

并创建一个服务：

object TempScalaService {
   private val service = TempScalaService()

   def apply() = service
}

使用依赖注入框架会更好,但它现在可以工作.

现在,为了测试,使用：

val service = mock[TempScalaService]
when(service.login("user","testuser")).thenReturn(true)

（编辑：李大同）

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