mockito 验证方法内部方法调用

Question

对于单元测试，我正在尝试验证是否有一种使用 mockito verify 验证方法内部方法调用的方法？

例如：

public delete(param) {
    VideoService.deleteVideo(param); << i want to verify the call of this method
    return etc.. 
}

我可以检查是否调用了 delete :

verify(mock,times(1)).delete(param);

是否还有一种方法可以检查内部方法，例如：验证（模拟，时间（1））。删除（参数）。VideoService.deleteVideo（参数）；

Answer 1

假设您有 class

class MyVideoService {

 final VideoService videoService;

 public MyVideoService(VideoService videoService) {
   this.videoService = videoService;
 }

 public void delete(param) {
     videoService.deleteVideo(param); 
 }
}

然后你用

模拟VideoService

VideoService videoService = mock(VideoService.class);

并使用这个模拟实例创建 MyVideoService，调用方法，验证：

MyVideService myVideoService = new MyVideoService(videoService);
myVideoService.delete (param);
verify(videoService, times(1)).deleteVideo(param);

Answer 2

你可以使用间谍。

public class MyVideoService {

  private VideoService videoService;

  public MyVideoService(VideoService videoService) {
    this.videoService = videoService;
  }

  public void delete(String param) {
    videoService.deleteVideo(param);
  }
}

public class VideoService {
  public void deleteVideo(String param) {
  }
}

如果您现在要测试使用 MyVideoService 的对象。例如

public class ObjectThatUsesMyVideoService {

  private MyVideoService myVideoService;

  ObjectThatUsesMyVideoService(MyVideoService myVideoService) {
    this.myVideoService = myVideoService;
  }

  public void deleteVideo(String param) {
    myVideoService.delete(param);
  }
}

你可以这样写一个测试

public class MyVideoServiceTest {

  @Test
  public void delete(){
    // VideoService is just a mock
    VideoService videoServiceMock = Mockito.mock(VideoService.class); 

    // Creating the real MyVideoService
    MyVideoService myVideoService = new MyVideoService(videoServiceMock);

    // Creating a spy proxy
    MyVideoService myVideoServiceSpy = Mockito.spy(myVideoService);

    ObjectThatUsesMyVideoService underTest = new ObjectThatUsesMyVideoService(myVideoServiceSpy);

    underTest .deleteVideo("SomeValue");

    // Verify that myVideoService was invoked
    Mockito.verify(myVideoServiceSpy, Mockito.times(1)).delete("SomeValue");

    // Verify that myVideoService invoked the VideoService
    Mockito.verify(videoServiceMock, Mockito.times(1)).deleteVideo("SomeValue");
  }
}

mockito 验证方法内部方法调用

mockito verify method call inside method

java

unit-testing

mocking

verify