我需要避免在對(duì)類進(jìn)行單元測(cè)試時(shí)調(diào)用某個(gè)方面。我正在使用 Java 8、spring 4.3.22.RELEASE 和mockito。我有一個(gè)@Service 和一個(gè)單元測(cè)試。我還有一個(gè) @Aspect，它在服務(wù)中的方法上定義了切入點(diǎn)，并且當(dāng)我運(yùn)行我的應(yīng)用程序時(shí)它工作正常。問(wèn)題是，當(dāng)我運(yùn)行單元測(cè)試時(shí)，會(huì)調(diào)用該方面，并由于該方面缺少依賴項(xiàng)而引發(fā) NullPointerException。服務(wù)等級(jí)：@Servicepublic class ContactService {    @Autowired    public InContactService(ContactDao contactDao) {        this.contactDao = contactDao;    }    public boolean muteCall(Long contactId) {        return contactDao.muteCall(contactId);    }}服務(wù)測(cè)試：public class ContactServiceTest {  @Mock  private ContactDao contactDao;  private ContactService contactService;  @Before  public void setUp(){    MockitoAnnotations.initMocks(this);    contactService = new ContactService(contactDao);  }  @Test  public void testMuteCall(){    contactService.muteCall(1L);  }}方面：@Aspectpublic class ContactAspect {    private MeterRegistry registry;    public void setRegistry(MeterRegistry registry) {        this.registry = registry;    }    @AfterReturning(pointcut = "execution(* com.company.ContactService.muteCall(..))", returning = "retVal")    public void checkReturnContactServiceMuteCall(JoinPoint joinPoint, boolean retVal) {        Object[] args = joinPoint.getArgs();      registry.counter("my.metric.mute_call").increment();    }}應(yīng)用背景：@Configurationpublic class ApplicationContext {    @Bean    public MeterRegistry meterRegistry() {      return new SimpleMeterRegistry();    }    @Bean    public ContactAspect contactAspect() {        ContactAspect aspect =   Aspects.aspectOf(ContactAspect.class);        aspect.setRegistry(meterRegistry());        return aspect;    }}我預(yù)計(jì)當(dāng)測(cè)試運(yùn)行時(shí)不會(huì)調(diào)用方面。目前，當(dāng)我運(yùn)行測(cè)試時(shí)，我收到 NullPointerException，因?yàn)閞egistry方面未定義。