调试时未使用自动配置初始化MapSTRt映射器

Question

我在mapstruct中使用spring boot 2.3.2。

在服务类中，我有一个映射器，它有一个自动连接的注释。

@Service
public BillingService{

    private BillingRepository billingRepository;


    @Autowired
    private  BillingMapper billingMapper;   


    @Autowired
    public BillingService (BillingRepository billingRepository){
        this.billingRepository=billingRepository;
    }

    public void getBilling(Long billingId){
        ....
        billingMapper.convertTo(...);
    }

}


@RunWith(MockitoJUnitRunner.class)
public class BillingServiceTest{
    @Mock
    BillingRepository billingRepository;

    private BillingService bilingService;

    @Spy
    private BillingMapper billingMapper = Mappers.getMapper(BillingMapper.class);

    @BeforeEach
    public void setup(){
        MockitoAnnotations.initMocks(this);
        billingService = new BillingService();
    }

    @Test
    public void testGetBilling(){

        List<Billing> billings = new ArrayList<>();
        ...

        List<BillingPayload> payloads = new ArrayList<>();

        when(billingMapper.convertTo(billings)).thenReturn(payloads);     

        bilingService.getBilling(1l);  
    }

}

@Mapper(componentModel="spring")
public interface BillingMapper{
    ...
}

当我调试BillingService类中的getBilling方法时，billingMapper总是空的；

Answer 1

您使用的配置非常奇怪。首先，您有一个返回BillingService的方法，它没有指定任何返回值，所以它甚至不会编译。我建议如下：

@Service
public BillingService{

    private final BillingRepository billingRepository;
    private final BillingMapper billingMapper;

    // constructor with bean injection
    public BillingService(final BillingRepository billingRepository,
                          final BillingMapper billingMapper) {
        this.billingRepository = billingRepository;
        this.billingMapper = billingMapper;
    }

    public void getBilling(Long billingId){
        ....
        billingMapper.convertTo(...);
    }

}

然后，您可以按照以下方式配置测试：

@RunWith(SpringJUnit4ClassRunner.class)
public class BillingServiceTest {

    @Spy private BillingMapper billingMapper = Mappers.getMapper(BillingMapper.class);
    @MockBean private BillingRepository billingRepository;
    @Autowired private BillingService billingService;

    @TestConfiguration
    static class BillingServiceTestContextConfiguration {
        @Bean public BillingService billingService() {
            return new BillingService(billingRepository, billingMapper);
        }
    }

    @Test
    public void testGetBilling(){
        List<Billing> billings = new ArrayList<>();
        ...
        List<BillingPayload> payloads = new ArrayList<>();
        when(billingRepository.findById(1L)).thenReturn(); // someResult
        when(billingMapper.convertTo(billings)).thenReturn(payloads);
        bilingService.getBilling(1l);  
    }
}

@Mapper(componentModel="spring")
public interface BillingMapper{
    ...
}

类似的配置应该可以工作。主要的问题是，您将@Autowired与setter/constructor注入混合在一起（不知道，因为你在BillingService中使用了奇怪的方法。也不知道你在尝试模拟界面时为什么要使用@Spy注释。@Spy用于模拟实际实例，而@Mock是模拟类类型。如果BillingMapper被指定为Bean在应用程序中。