Unresolved dependency in UnitTesting Spring Boot

Question

I getting the following error when trying to write a unit test for CircuitBreaker code example.

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'com.foosball.team.Service.TeamServiceUnitTest': Unsatisfied dependency expressed through field 'registry'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'io.github.resilience4j.circuitbreaker.CircuitBreakerRegistry' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}

TeamService:

@Service
public class TeamService {

    @Autowired
    private ITeamRepository teamRepository;

    @Autowired
    private PlayerClient playerClient;

    Logger logger = LoggerFactory.getLogger(TeamService.class);
    .
    .
    .

TeamServiceUnitTest:

@SpringBootTest(classes = {
        TeamService.class
})
@RunWith(SpringRunner.class)
@DirtiesContext
public class TeamServiceUnitTest extends AbstractCircuitBreakerTest {

    @MockBean
    private ITeamRepository teamRepository;

    @MockBean
    private PlayerClient playerClient;

    @Autowired
    private TeamService service;

    private TeamEntity teamEntity;

    private Logger logger = LoggerFactory.getLogger(TeamServiceUnitTest.class);

    @Before
    public void setUp(){
        teamEntity = new TeamEntity();
        teamEntity.setId(1L);
        teamEntity.setPlayerOne("One");
        teamEntity.setPlayerTwo("Two");
        teamEntity.setPlayerThree("Three");
        teamEntity.setPlayerFour("Four");
    }

    @Test
    @DisplayName("when Player Client Fails 11 Times Then CircuitBreaker Should Be In OPEN State")
    public void whenPlayerClientFailsElevenTimesThenCircuitBreakerShouldBeInOPENState(){
        //Given
        when(teamRepository.findAll()).thenReturn(new ArrayList<>());
        when(playerClient.get(Mockito.anyString())).thenThrow(new RuntimeException());


        //When
        for(int i=0; i<11; i++){
            try {
                service.addTeam(teamEntity);
            } catch (Exception ignore) {
                logger.info(ignore.getClass().getName());
            }
        }

        //Then
        checkHealthStatus(BACKEND_B, CircuitBreaker.State.OPEN);
    }

}

Ref Class:

public class AbstractCircuitBreakerTest {

    protected static final String BACKEND_A = "backendA";
    protected static final String BACKEND_B = "playerClientCircuitBreaker";

    @Autowired
    protected CircuitBreakerRegistry registry;

    @Before
    public void setup(){
        transitionToClosedState(BACKEND_A);
        transitionToClosedState(BACKEND_B);
    }

    protected void checkHealthStatus(String circuitBreakerName, CircuitBreaker.State state) {
        CircuitBreaker circuitBreaker = registry.circuitBreaker(circuitBreakerName);
        assertThat(circuitBreaker.getState()).isEqualTo(state);
    }

    protected void transitionToOpenState(String circuitBreakerName) {
        CircuitBreaker circuitBreaker = registry.circuitBreaker(circuitBreakerName);
        if(!circuitBreaker.getState().equals(CircuitBreaker.State.OPEN)){
            circuitBreaker.transitionToOpenState();
        }
    }

    protected void transitionToClosedState(String circuitBreakerName) {
        CircuitBreaker circuitBreaker = registry.circuitBreaker(circuitBreakerName);
        if(!circuitBreaker.getState().equals(CircuitBreaker.State.CLOSED)){
            circuitBreaker.transitionToClosedState();
        }
    }
}

Ref Project: https://github.com/resilience4j/resilience4j-spring-boot2-demo

Proposed Soln Discussion: https://github.com/resilience4j/resilience4j-spring-boot2-demo/issues/33

Proposed Soln Project: https://github.com/shah-smit/resilience4j-spring-boot2-demo-maven

Answer 1

Looks like CircuitBreakerRegistry you're trying to autowire in you test is a factory class, not a bean. Instead of @Autowired protected CircuitBreakerRegistry registry;
Try: protected CircuitBreakerRegistry registry = CircuitBreakerRegistry.ofDefaults()