@Mock 和 @InjectMocks 的多个级别

Question

所以我知道在 Mockito 中 @InjectMocks 会通过 @Mock 的注释注入任何它能注入的东西，但是如何处理这种情况呢？

    @Mock
    private MockObject1 mockObject1;
    
    @Mock
    private MockObject2 mockObject2;
    
    @InjectMocks
    private SystemUnderTest systemUnderTest = new SystemUnderTest();

想象一下，MockObject2 有一个 MockObject1 类型的属性，而 SystemUnderTest 有一个 MockObject2 类型的属性。我希望将 mockObject1 注入到 mockObject2 中，并将 mockObject2 注入到 systemUnderTest 中。

这可以通过注释实现吗？

Answer 1

由于我在这里没有得到任何回复，所以我在 Mockito 论坛上提问。以下是讨论的链接：https://groups.google.com/d /topic/mockito/hWwcI5UHFi0/discussion

总结一下答案，从技术上讲，这会破坏模拟的目的。您实际上应该只模拟 SystemUnderTest 类所需的对象。在本身就是模拟的对象中模拟事物是毫无意义的。

如果您真的想这样做，@Spy 可以提供帮助。

Answer 2

通过将 @Spy 与 @InjectMocks 结合起来是可能的。对于您的示例，它将是：

@Spy
private MockObject1 mockObject1 = new MockObject1 ();

@Spy @InjectMocks //if MockObject2 has a MockObject1, then it will be injected here.
private MockObject2 mockObject2 = new MockObject2 ();

@InjectMocks
private SystemUnderTest systemUnderTest;

Answer 3

我发现的其他解决方案是使用 java sintax 而不是注释来注入 @Spy 对象。

@Spy
private MockObject1 mockObject1 = new MockObject1 ();

@InjectMocks //if MockObject2 has a MockObject1, then it will be injected here.
private MockObject2 mockObject2 = spy(MockObject2.class);

@InjectMocks
private SystemUnderTest systemUnderTest;

Answer 4

这对我有用：

private MockObject1 mockObject1 = mock(MockObject1.class);

@Spy
private RealObject2 realObject = new RealObject2(mockObject1);

@InjectMocks
private SystemUnderTest systemUnderTest = new SystemUnderTest();

Answer 5

这是我的解决方案：

@ExtendWith(SpringExtension.class)
class DocumentServiceTestMock {

//2nd Level Dependency
CustomerFacade customerFacade = Mockito.mock(CustomerFacade.class);

//Direct Dependency
@Spy
PostCreateHelper postCreateHelper = new PostCreateHelper(customerFacade);

//SUT
@InjectMocks
DocumentService documentService;

@BeforeEach
void setUp() {
        given(customerFacade.getString()).willReturn("customerFacade_MOCKED");
}

@Test
void test() {
     String documentAsResource = documentService.getDocumentAsResource(ExportType.WORD);
}
//----------
@Service
public class DocumentService {
   final PostCreateHelper postCreateHelper;

@Component
public class PostCreateHelper {
   final CustomerFacade customerFacade;

@Service
public class CustomerFacade {