此问题是https://github.com/paulbutcher/ScalaMock/issues/79
中提到的已解决问题的扩展我有以下特点来模拟:
trait HttpClient{
def deserialize[T](response: HttpResponse)
(implicit um: Unmarshaller[ResponseEntity, T],
executionContext: ExecutionContext): Future[T]
}
我试图按如下方式模拟HttpClient
val client = mock[HttpClient]
case class SomeTypeT(name:String, id:Int)
implicit val someTypeTFormat = jsonFormat2(SomeTypeT) // to be able to marshal and unmarshal from JSON
(httpClient.deserialize[SomeTypeT](_: HttpResponse))
.expects(where {
(response: HttpResponse) => {
response.entity == ent
}
})
.returns(Unmarshal(response.entity).to[SomeTypeT])
当我尝试模拟反序列化函数时会出现问题。如上所述,deserialize
方法由类型化参数T
和类型HttpResponse
的单个参数组成,还有2个在解组响应时使用的隐式参数。
因此,问题是如何使用ScalaMock模拟deserialize
函数并在模拟时指定多个隐式参数。这不起作用
// Both UnMarshaller & ExecutionContext are available here as implicits
(httpClient.deserialize[SomeTypeT](_: HttpResponse)(_: Unmarshaller[ResponseEntity, SomeTypeT](_: ExecutionContext))
问题是我无法使用_
来指定隐式参数。而且我不知道如何实现这一目标。请帮助如何模拟给定的功能
我使用以下库:
虽然由于使用了多个_
,第二次尝试甚至无法编译,但第一次尝试导致以下异常:
org.scalamock.function.MockFunction3 cannot be cast to org.scalamock.function.MockFunction1
java.lang.ClassCastException: org.scalamock.function.MockFunction3 cannot be cast to org.scalamock.function.MockFunction1
答案 0 :(得分:1)
在GitHub上回答你链接后,你的代码应该是
(httpClient.deserialize[SomeTypeT](_: HttpResponse)(_: Unmarshaller[ResponseEntity, SomeTypeT], _:ExecutionContext))
.expects(where {
(response: HttpResponse, _: Unmarshaller[ResponseEntity, SomeTypeT], _:ExecutionContext) => {
response.entity == ent
}
})
.returns(Unmarshal(response.entity).to[SomeTypeT])
即。你明确地将调用中隐式参数的占位符作为第二组参数放在where
中作为所有非隐式的附加参数。