Using @Mock and @InjectMocks

Question

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 c

Answer 1

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!!!

Answer 2

Your code works fine for me using Mockito 1.9.

Using an 1.8+ version of Mockito I get a very specific error message telling me exactly how to fix the problem. As php-coder suggests: For Mockito 1.8+ you need to initialize the field.

Did you see this or any other error message?

Edit:

The following code works for me. Small changes:

• Removed Spring annotations
• Removed Interface
• Added Getter
• Added empty TaskService
• Added test with System.out.println

Does it produce an error for you? :

Service:

public class ReportServiceImpl {

    private TaskService taskServiceImpl;


    public ReportServiceImpl() {

    }


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


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


    public TaskService getTaskServiceImpl() {
        return taskServiceImpl;
    }
}

Dependency:

public class TaskService {

}

Test, prints mockTaskService:

@RunWith(MockitoJUnitRunner.class)
public class ReportServiceImplTestMockito {

    @Mock
    private TaskService       mockTaskService;

    @InjectMocks
    private ReportServiceImpl service;


    @Test
    public void testMockInjected() {
        System.out.println(service.getTaskServiceImpl());
    }
}

Answer 3

I'm not sure, but try to create new instance of ReportServiceImpl manually (as you did in working example):

 @InjectMocks 
 private ReportServiceImpl service = new ReportServiceImpl();