java - 如何在客户端接口(interface)中注入(inject)Mockito服务层

Question

@Service
public class UserServiceImpl implements UserService {

    @Autowired
    private TwinApiUserClient userClient; //client side interface we get the data through some queries
    public TwinCollectionUserResponse getUserIds() {
        return userClient.query(UUID.fromString("s8yt544-sadsa4-sda-dfds-hfdsfsjfs8"), null, null).getBody();
    }

UserSerivceTest.class

@RunWith(SpringRunner.class)
@SpringBootTest
public class UserSerivceTest{

    @Autowired
    private UserServiceImpl UserService;

    @MockBean
    private TwinApiUserClient userClient;

    @Test
    public void testGetTwins() {
        TwinUsernResponse userResponse = this.getTwinUserResponse();//here userResponse is hard coded
        Mockito.when(userClient.query(UUID.fromString("s8yt544-sadsa4-sda-dfds-hfdsfsjfs8"), null, null).getBody()).thenReturn(userResponse);
        assertThat(UserService.getUserIds()).isEqualTo(userResponse);
    }

但是我遇到了空指针异常。当尝试通过 Mockito 硬编码初始化 TwinApiUserClient 接口(interface)时。

Answer 1

参见@MockBean允许您使用 Mockito deep stubs 的文档

    @MockBean(answer = RETURNS_DEEP_STUBS)
    private TwinApiUserClient userClient;

这允许您模拟一系列调用的结果，例如您在此处尝试的a().b().c()。