在基於Mockito的junit測試類中注入嵌套的依賴項

Question

我正在為一個控制器編寫單元測試，這是我的代碼

public class MyController
{
    @Inject
    private MyService myService;

    public List<Car> getCars()
    {
        myService.getCars();
    }
}

public class MyServiceImpl implements MyService 
{
    @Inject
    AService aService;

    @Inject
    BService bService;

    public List<Car> getCars()
    {
        aService.getCars();
    }
}


Public class MyControllerTest
{

    private MockMvc standAloneMockMvc;

    @InjectMocks
    MyController myController;

    @Mock
    private MyService myService;

    @Before
    public void initTestObjs() 
    {
        MockitoAnnotations.initMocks(this);

        this.standAloneMockMvc = MockMvcBuilders.standaloneSetup(myController).build();

    }

    @Test
    public void testGetAllCars() throws Exception
    {
        String url = "/car/list";

        List<Car> listCars = new ArrayList<Car>();
        Car car = new Car();
        listCars.add(car);

        Mockito.when(myService.getCars()).thenReturn(listCars);

        MvcResult result = standAloneMockMvc.perform(MockMvcRequestBuilders.get(url))
        .andDo(MockMvcResultHandlers.print())
        .andExpect(MockMvcResultMatchers.status().isOk())
        .andReturn();

        String jsonResult = result.getResponse().getContentAsString();
    }
}

當嘗試加載aService和bService時，在MyControllerTest中為myService創建bean時遇到錯誤。

有人可以幫忙嗎？ 還有其他人遇到類似的問題嗎？

堆棧跟蹤：

Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: com.xyz.AService com.xyz.aService; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.xyz.AService] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@javax.inject.Inject()}  
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:571)
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:331)

Answer 1

您需要完全提供所有模擬實現，即。 您的測試類無法弄清楚這些AService和aService是什么； BService bService； 是。

@mock將查找要顯示的所有字段（模擬）

因此，您可以為他們提供模擬提供模擬執行

..

private MockMvc standAloneMockMvc;

    @InjectMocks
    MyController myController;

    @Mock
    private MyService myService;

    @Mock
    AService aService;

    @Mock
    BService bService;

....