@webMvcTest is not excluding and loading beans marked as @Repository

Question

I've a @RestController which has only one dependency in field @Autowire that dependency is @component, that component Class definition has some autowired fields which are @service and those services have some @repositories.

In this whole flow I've kafka, Quartz, Cassandra and DB2 So when I was creating a Unit test case for my controller, I dont want to setup whole application. so I decided to use @webMvcTest and used @MockBean on my only one dependency of controller class.

But my Test is throwing and exception because its trying to create a Dao bean, which is marked as @repository.

@ActiveProfiles("test")
@WebMvcTest(controllers = MyControllerTest .class)
class MyControllerTest {

    @MockBean
    MyControllerDependency dependency;

    @Autowired
    MockMvc mockMvc;

    @Test
    void test_something() throws Exception {
       assert(true);
    }
}

Here is oversimplified version of code

@Component
class MyControllerDependency { 
    @AutoiWired
    MyCustomService service;
}

@Service
class MyCustomService{

   @Autowired
   MyCustomDao dao;
}

@Repository
class MyCustomDao{
    @Autowired
    private JdbcTemplate template;
}

I'm getting following exception in test.

Exception

***************************
APPLICATION FAILED TO START
***************************

Description:

Field template in com.....MyCustomDao`  required a bean of type 'org.springframework.jdbc.core.JdbcTemplate' that could not be found.

Question is, When I'm using @WebMvcTest slice and already mocking the only required dependency MyControllerDependency then why spring test context is trying to load MyCustomDao which is annotated as @Repository.

I can do integration testing with SpringbootTest & AutoconfigureMockMVC, but for writing Junit test just for controller, I need to use WebMvcTest slice. which is creating a problem.

Answer 1

I ran into a similar problem where I want to test only my controller using @WebMvcTest, but the spring context was trying to create nondependent spring beans and was failing as below.

Failed to load ApplicationContext java.lang.IllegalStateException: Failed to load ApplicationContext Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'TestController' defined in file ...

Solution: load only the controller your testing for an example like @ContextConfiguration(classes = DemoController.class). Also, find below a complete sample

    @WebMvcTest
    @ContextConfiguration(classes = DemoController.class)  
    public class DemoControllerTest {    
        @Autowired
        MockMvc mockMvc;

        @MockBean
        DemoService demoService;

        @Test
        public void testGetAllProductCodes_withOutData() throws Exception {
            when(productCodeService.getAllProductCodes())
                    .thenReturn(new ArrayList<ProductCodes>());
            mockMvc.perform(MockMvcRequestBuilders.get("/services/productCodes"))
            .andExpect(MockMvcResultMatchers.status().isNoContent());
        }
    }
}