Springboot应用程序和MockMvc之间的行为差​​异

Question

我已经创建了一个Spring Boot应用程序，并且正在使用MockMvc来测试该应用程序。我的应用程序有一个拦截器，用于记录状态代码和响应内容的长度。我在运行Springboot应用程序与使用模拟MVC测试它时在行为上存在差异。

应用代码：

@RestController
@EnableAutoConfiguration
public class DemoApp{

public static void main(String[] args) {
    SpringApplication.run(DemoApp.class, args);
}

@RequestMapping(value = "/hello")
public String hello() {
    return "Hello World";
}

@RequestMapping(value = "/exception")
public String exception() throws FileNotFoundException {
    throw new FileNotFoundException();
}

拦截器代码：

@Component
public class MyInterceptor implements HandlerInterceptor {

private static final Logger LOGGER = LoggerFactory.getLogger(MyInterceptor.class);

public MyInterceptor() {
}

@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
        throws Exception {
    return true;
}

@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
        ModelAndView modelAndView) throws Exception {
}

@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler,
        Exception exception) throws Exception {
    LOGGER.info("Status Code:"+String.valueOf(response.getStatus()));
    LOGGER.info("Transfer Encoding:"+response.getHeader(HeaderConstants.TRANSFER_ENCODING));
    LOGGER.info("Content Length:"+response.getHeader(HeaderConstants.CONTENT_LENGTH));
}
}

测试用例：

private MockMvc mvc;

@Before
public void setup() {
    mvc = MockMvcBuilders.standaloneSetup(DemoApp.class).addInterceptors(MyInterceptor).build();
}


@SuppressWarnings("deprecation")
@Test
public void testException() throws Exception {

    try {
        mvc.perform(get("/exception").accept(MediaType.TEXT_PLAIN)).andExpect(status().is5xxServerError()).andDo(print());
        Assert.fail("Exception expected from server");
    } catch (Exception e) {
        /* NOOP */
    }
}

应用程序返回分块的状态代码500和Transfer-Encoding，而测试用例返回状态代码200，并且Transfer-Encoding API缺少/exception标头。

有人可以让我知道这是预期的行为还是我做错了什么？