mockito：将类mock注入私有接口字段

Question

@Component
public class Service {

    @Autowired 
    private iHelper helper;

    public void doSomething() {
        helper.helpMeOut();
    }
}

@RunWith(MockitoJUnitRunner.class)
public class ServiceTest {

    @Mock
    private iHelper helper;

    @InjectMocks
    private Service service;

    @Before
    public void setup() {
        service = new Service();
    }

    @Test
    public void testStuff() {
        doNothing().when(helper).helpMeOut();
        service.doSomething();
    }
}

有什么建议吗？我如何让Mockito正确地将一个mock注入到一个接口私有字段？

Answer 1

@ACDCJunior的评论帮我弄明白了问题所在。使用new关键字实例化service导致Spring无法正确注入依赖项（在本例中为helper）。我在测试中通过自动服务修复了这个问题。我的最终工作代码如下所示：

我正在测试的类

@Component
public class Service {

    @Autowired 
    private iHelper helper;

    public void doSomething() {
        helper.helpMeOut();
    }
}

我对这门课的测试

@RunWith(MockitoJUnitRunner.class)
public class ServiceTest {

    @Mock
    private iHelper helper;

    @InjectMocks
    @Autowired
    private Service service;

    @Test
    public void testStuff() {
        doNothing().when(helper).helpMeOut();
        service.doSomething();
    }
}