使用Mockito测试数组长度

Question

我正在尝试为Spring启动项目实现单元测试。

我是Java单元测试的新手，我知道我可以在服务层测试我的项目。这里是:

@Mock
private ICampusRepository campusRepository;
@InjectMocks
private CampusServiceImplementation campusService;
private List<Campus> campusList = new ArrayList<>();
@BeforeEach
void setUp() {
MockitoAnnotations.openMocks(this);
campusList.add(new Campus(1, "Campus Name 1", "ACTIVE"));
campusList.add(new Campus(2, "Campus Name 2", "ACTIVE"));
campusList.add(new Campus(3, "Campus Name 3", "INACTIVE"));
}

然后，对于测试，我有一些非常基本的测试:

@Test
void getAllCampus() {
when(campusRepository.findAll()).thenReturn(campusList);
assertNotNull(campusService.getAllCampus());
}

我想做一个测试来验证某个方法是否返回带有"ACTIVE"的校园列表。属性，我试着这样做:

@Test
void listAllActiveCampus() {
when(campusRepository.findAllActiveCampus()).thenReturn(campusList);
assertEquals(2, campusService.listAllActiveCampus().size());
}

但测试结果是:

org.opentest4j.AssertionFailedError: 
Expected :2
Actual   :0

问题是:我应该创建一个只有2个值的新数组吗?有没有更好的方法来创建更好的结论性测试?

编辑

campusService代码:

@Override
public List<Campus> getAllCampus() {
return campusRepository.findAll();
}
...
@Override
public List<Campus> listAllActiveCampus() {
return campusRepository.findAllActiveCampus();
}

存储库:

public interface ICampusRepository extends JpaRepository<Campus, Integer> {
@Query(value = "SELECT * FROM catSede WHERE sedeEstatusId = 3", nativeQuery = true)
List<Campus> findAllActiveCampus();
}

编辑2

完整测试类:

@SpringBootTest
class CampusServiceImplementationTest {
@Mock
private ICampusRepository campusRepository;
@InjectMocks
private CampusServiceImplementation campusService;
@BeforeEach
void setUp() {
MockitoAnnotations.openMocks(this);
}
@Test
void getAllCampus() {
List<Campus> campusList = new ArrayList<>();
campusList.add(new Campus(1, "Campus Name 1", "ACTIVE"));
campusList.add(new Campus(2, "Campus Name 2", "ACTIVE"));
campusList.add(new Campus(3, "Campus Name 3", "INACTIVE"));
when(campusRepository.findAll()).thenReturn(campusList);
List<Campus> result = campusRepository.findAll();
assertNotNull(result);
assertEquals(3, result.size());
verify(campusRepository, times(1)).findAll();
}
@Test
void listAllActiveCampus() {
List<Campus> campusList = new ArrayList<>();
campusList.add(new Campus(1, "Campus Name 1", "ACTIVE"));
campusList.add(new Campus(2, "Campus Name 2", "ACTIVE"));
campusList.add(new Campus(3, "Campus Name 3", "INACTIVE"));
when(campusRepository.findAllActiveCampus()).thenReturn(campusList);
List<Campus> result = campusRepository.findAllActiveCampus();
assertNotNull(result);
assertEquals(2, result.size());
verify(campusRepository, times(1)).findAllActiveCampus();
}
}

服务类:

@Service
@RequiredArgsConstructor
public class CampusServiceImplementation implements ICampusService {
private final ICampusRepository campusRepository;
@Override
public List<Campus> getAllCampus() {
return campusRepository.findAll();
}

@Override
public List<Campus> listAllActiveCampus() {
return campusRepository.findAllActiveCampus();
}
}

存储库:

public interface ICampusRepository extends JpaRepository<Campus, Integer> {
@Query(value = "SELECT * FROM catSede WHERE sedeEstatusId = 3", nativeQuery = true)
List<Campus> findAllActiveCampus();
}

Answer 1

当你写

when(campusRepository.findAllActiveCampus()).thenReturn(campusList);
assertEquals(2, campusService.listAllActiveCampus().size());

和您的setUp()如下所示，那么您应该得到错误:

org.opentest4j.AssertionFailedError: 
Expected :2
Actual   :3

，因为你配置了你的' campusRepository '，所以当调用' findAllActiveCampus() '时，它应该返回' campusList '，其中又包含32不是2元素都是"ACTIVE"

请记住，在这个测试中根本没有执行@Query(value = "SELECT * FROM catSede WHERE sedeEstatusId = 3", nativeQuery = true)，因为存储库只是一个模拟!