使用@Mock 和@InjectMocks

2022-01-08 00:00:00 mocking mockito java

我目前正在研究 Mockito 框架，并使用 Mockito 创建了几个测试用例.但后来我读到，我可以使用 @Mock 和 @InjectMocks 而不是调用 mock(SomeClass.class) - 我唯一的需要做的是用 @RunWith(MockitoJUnitRunner.class) 注释我的测试类或使用 MockitoAnnotations.initMocks(this); 在 @Before方法.

I'm currently studying the Mockito framework and I've created several test cases using Mockito. But then I read that instead of invoking mock(SomeClass.class) I can use the @Mock and the @InjectMocks - The only thing I need to do is to annotate my test class with @RunWith(MockitoJUnitRunner.class) or use the MockitoAnnotations.initMocks(this); in the @Before method.

但它不起作用 - @Mock 似乎不起作用！这是我的 2 个代码修订版 - 一个使用注释，一个没有.

But it doesn't work - It seems that the @Mock won't work! Here is my 2 codes revisions - one using the annotations and one without.

我做错了什么?

public class ReportServiceImplTestMockito {

    private TaskService       mockTaskService; // This is the Mock object
    private ReportServiceImpl service;

    @Before
    public void init(){
        service         = new ReportServiceImpl();
        mockTaskService = mock(TaskServiceImpl.class);
        service.setTaskServiceImpl(mockTaskService);
    }
/// ...

 Some tests
}

正如我所说 - 这工作很棒.但以下不会:

As I said - this work great. But the following wont:

@RunWith(MockitoJUnitRunner.class)
public class ReportServiceImplTestMockito {

     @Mock 
     private TaskService      mockTaskService;

     @InjectMocks 
     private ReportServiceImpl service;

         // Some tests
}

这里是 ReportServiceImpl 类:

@Service
public class ReportServiceImpl implements ReportService {

    @Autowired
    private TaskService taskServiceImpl;

    public ReportServiceImpl(){}

    public ReportServiceImpl(TaskService taskService){
        this.taskServiceImpl = taskService;
    }

    public void setTaskServiceImpl(TaskService taskServiceImpl) {
        this.taskServiceImpl = taskServiceImpl;
    }
}

我错过了什么?

推荐答案

好吧，我搞错了！！！我使用了 @InjectMocks 但在 init() 方法中初始化了相同的变量...所以发生的事情是，mockito 将模拟对象注入到我的变量中 - 但几秒钟后我运行了它 - 初始化了同一个变量！！！

O.K, I got my mistake!!! I've used the @InjectMocks but initialized the same variable in the init() method... So what happened was that mockito injected the mock objects to my variable - but seconds later I ran it over - initializing that very same variable!!!

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