How to write junit test cases for rest controller, service and dao layer using springboot?

问题

How to write JUnit Test cases for RestController, Service and DAO layer?

I've tried MockMvc

@RunWith(SpringRunner.class)
public class EmployeeControllerTest {

    private MockMvc mockMvc;

    private static List<Employee> employeeList;

    @InjectMocks
    EmployeeController employeeController;

    @Mock
    EmployeeRepository employeeRepository;

    @Test
    public void testGetAllEmployees() throws Exception {

        Mockito.when(employeeRepository.findAll()).thenReturn(employeeList);
        assertNotNull(employeeController.getAllEmployees());
        mockMvc.perform(MockMvcRequestBuilders.get("/api/v1/employees"))
                .andExpect(MockMvcResultMatchers.status().isOk());
    }

How can I verify the CRUD methods inside the rest controller and other layers ?

回答1:

You can use @RunWith(MockitoJUnitRunner.class) for unit testing with your Service Layer mocking your DAO Layer components. You don't need SpringRunner.class for it.

Complete source code

    @RunWith(MockitoJUnitRunner.class)
    public class GatewayServiceImplTest {

        @Mock
        private GatewayRepository gatewayRepository;

        @InjectMocks
        private GatewayServiceImpl gatewayService;

        @Test
        public void create() {
            val gateway = GatewayFactory.create(10);
            when(gatewayRepository.save(gateway)).thenReturn(gateway);
            gatewayService.create(gateway);
        }
    }

You can use @DataJpaTest for integration testing with your DAO Layer

    @RunWith(SpringRunner.class)
    @DataJpaTest
    public class GatewayRepositoryIntegrationTest {

        @Autowired
        private TestEntityManager entityManager;

        @Autowired
        private GatewayRepository gatewayRepository;

        // write test cases here     
    }

Check this article for getting more details about testing with Spring Boot

来源：https://stackoverflow.com/questions/57662014/how-to-write-junit-test-cases-for-rest-controller-service-and-dao-layer-using-s

标签

java

rest

spring-boot

junit

mockito