Question

Im单元测试一种服务方法，其中使用（模拟）rest模板向另一个服务发出请求。它具有@HystrixCommand属性，以便在必要时调用后备方法。在测试中，这与我的工作方式相同，这意味着其余模板返回Bad Request时，将调用fallback方法。但是，我尝试进行单元测试，并手动使模拟的其余模板返回Http 400错误请求。我很惊讶地看到这不会触发Hystrix后备。有人知道为什么吗？

@Autowired
private RestTemplate restTemplate;

@HystrixCommand(fallbackMethod = "fallback")
public SomeResponse restCall(SomeRequest request) {
    HttpEntity<Object> httpEntityRequest = new HttpEntity<>(request);
    ResponseEntity<R> response = restTemplate.exchange(
            "http://localhost:5000/otherservice,
            HttpMethod.POST,
            httpEntityRequest,
            responseClass);

    if (response != null) 
        return response.getBody();
    else 
        return new SomeResponse();
}

private SomeResponse fallback(SomeRequest request) {
    log.error("Log Error);
    return null;
}

我的单元测试：

@Mock
private Appender<ILoggingEvent> mockAppender;

@Captor
private ArgumentCaptor<LoggingEvent> captorLoggingEvent;

@MockBean
private RestTemplate mockRestTemplate;

@Autowired
private SomeService service;

@Before
public void setUp() {
    Logger logger = (Logger) 
    LoggerFactory.getLogger(SomeServiceTest.class);
    logger.addAppender(mockAppender);
}

@Test
public void restCallTest() {
    ResponseEntity<SomeResponse> response = new ResponseEntity<>(HttpStatus.BAD_REQUEST);

    when(mockRestTemplate.exchange(anyString(), any(), any(), eq(BannerResponse.class))).thenReturn(response);

    SomeResponse someResponse = service.fallback(new SomeRequest());

    verify(mockRestTemplate, times(1)).exchange(anyString(), any(), any(), eq(SomeResponse.class));
    verify(mockAppender).doAppend(captorLoggingEvent.capture());

    assertThat(captorLoggingEvent.getValue().toString(), containsString("Log error"));
    assertNull(someResponse);
}

此致

单元测试中的HTTP RestTemplate不会触发Hystrix后备

0 个答案: