Mockito如何通过UUID测试findById

Question

我有一个测试类的问题。

在我的ParkingSpotService类中，有一个UUID找到的方法，我想为此编写一个测试：

@Transactional
public Optional<ParkingSpotModel> findById(UUID id) {
    return parkingSpotRepository.findById(id);
}

我做了什么？我创建了一个TestClass ParkingSpotServiceTest：

@SpringBootTest                                                                    
public class ParkingSpotServiceTest {

private static final UUID ID = UUID.fromString("35361d85-107c-4f1f-a047-263093161c1b");
private static final String PARKINGSPOTNUMBER = "1010";
private static final String LICENSEPLATECAR = "EAM3J81";
private static final String MODELCAR = "FIT";
private static final String BRANDCAR = "HONDA";
private static final String COLORCAR = "GREEN";
private static final LocalDateTime REGISTRATIONDATE = LocalDateTime.now();          
private static final String RESPONSIBLENAME = "Edison Azevedo";     
private static final String APARTMENT = "51";
private static final String BLOCK = "A";            

@InjectMocks
private ParkingSpotService service;

@Mock
private ParkingSpotRepository repository;

private ParkingSpotModel parkingSpot;   
private Optional<ParkingSpotModel> optionalParkingSpot;
Pageable pageable;

@BeforeEach
void setUp() {
    MockitoAnnotations.openMocks(this);
    startParkingSpot();
}

private void startParkingSpot() {
    parkingSpot = new ParkingSpotModel(ID, 
                                       PARKINGSPOTNUMBER, 
                                       LICENSEPLATECAR, 
                                       BRANDCAR, 
                                       MODELCAR, 
                                       COLORCAR, 
                                       REGISTRATIONDATE, 
                                       RESPONSIBLENAME, 
                                       APARTMENT, 
                                       BLOCK);      
    
    optionalParkingSpot = Optional.of(new ParkingSpotModel(ID, 
                                                           PARKINGSPOTNUMBER, 
                                                           LICENSEPLATECAR, 
                                                           BRANDCAR, 
                                                           MODELCAR, 
                                                           COLORCAR, 
                                                           REGISTRATIONDATE, 
                                                           RESPONSIBLENAME, 
                                                           APARTMENT, 
                                                           BLOCK));                 
}

}

在我创建了一个测试之后

@Test
void whenFindParkingSpotByIDThenReturnAnParkingSpotInstance() {     
    Mockito.when(repository.findById(Mockito.any(UUID.class))).thenReturn(optionalParkingSpot); 
    Optional<ParkingSpotModel> response = service.findById(ID); 
    **//above my response is value = null  ->  Optional.empty.    Why????????** 
    Assertions.assertNotNull(response);     
    
    Assertions.assertEquals(java.util.Optional.class, response.getClass());             
    
    Assertions.assertEquals(ID, response.get().getId());
    //here my test broke because my response "java.util.NoSuchElementException: No value present"

观察：

1. 当我检查optionalParkingSpot时，所有数据都在那里。Mockito.when（repository.findById（Mockito.any（UUID. class）））。
2. 当我检查ID时，正确地评估我的UUID（35361d85-107c-4f1f-a047-263093161c1b）可选

我的“响应”有什么问题？为什么数据是value=null-




Answer 1

您确定@beforeach注释方法中的调用顺序正确吗？首先用MockitoAnnotations初始化mock。OpenSock（this）然后初始化应该注入的值？我建议你换一种方式试试。

@BeforeEach
void setUp() {
    startParkingSpot();
    MockitoAnnotations.openMocks(this);
}

另外，不要忘记按中所述发布模拟https://javadoc.io/doc/org.mockito/mockito-core/latest/org/mockito/InjectMocks.html

或者，您可以删除注释并注入用Mockito创建的mock。模仿（…） 手动。