java - UnitTesting Spring Boot 中 Unresolved 依赖关系

Question

尝试为 CircuitBreaker 代码示例编写单元测试时出现以下错误。

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)}

团队服务:

@Service
public class TeamService {

    @Autowired
    private ITeamRepository teamRepository;

    @Autowired
    private PlayerClient playerClient;

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

团队服务单元测试:

@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);
    }

}

引用类别:

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();
        }
    }
}

引用项目:https://github.com/resilience4j/resilience4j-spring-boot2-demo

提议的 Soln 讨论:https://github.com/resilience4j/resilience4j-spring-boot2-demo/issues/33

拟议的 Soln 项目:https://github.com/shah-smit/resilience4j-spring-boot2-demo-maven

Answer 1

看起来您在测试中尝试 Autowiring 的 CircuitBreakerRegistry 是一个工厂类，而不是一个 bean。代替@Autowired
protected CircuitBreakerRegistry注册表；
尝试: protected CircuitBreakerRegistry 注册表 = CircuitBreakerRegistry.ofDefaults()