CODEWITHSUNDEEP
javaspringtdd
Evgenii
Evgenii

Reputation: 449

Spring boot app works when I run it, but falls when I test it

I have a simple spring app with one controller

@RestController
public class UserController {

//  @Autowired
//  UserServiceImpl userService;

  @RequestMapping(value="/getUser", method = RequestMethod.GET)
  public String getUser(){
//    return userService.greetUser();
    return "Hello user";
  }

It works when I start it. If I uncomment @Autowired and run with the first return statement using UserService it also works.

My Service interface

@Service
public interface UserService {
  String greetUser();
  void insertUsers(List<User> users);
}

and implementation

@Service
public class UserServiceImpl implements UserService{

  @Override
  public String greetUser() {
    return "Hello user";
  }
}

But when I test it, the app falls with the following errors

java.lang.IllegalStateException: Failed to load ApplicationContext
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userController': Unsatisfied dependency expressed through field 'userService'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.example.demo.service.UserServiceImpl' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.example.demo.service.UserServiceImpl' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}

The test class

@RunWith(SpringRunner.class)
@WebMvcTest
public class DemoApplicationTests {

  @Autowired
  private MockMvc mockMvc;

    @Test
  public void shouldReturnHelloString() throws Exception{
      this.mockMvc
      .perform(get("/getUser"))
      .andDo(print())
      .andExpect(status().isOk())
      .andExpect(content().string("Hello user"));
  }
}

Also, if I remove

//  @Autowired
//  UserServiceImpl userService;

and run test with second return statement, the test execute without error. I understand that the problem is in the UserServiceImpl, but I don't know what it is. What do I need to correct?

Upvotes: 0

Views: 202

Answers (1)

Mykola Yashchenko
Mykola Yashchenko

Reputation: 5371

You should try to autowire your bean by an interface, not implementation

@Autowired
UserService userService;

And also you should remove @Service from UserService interface

Upvotes: 1

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