我的问题与测试Spring @RestController有关,它也使用@ControllerAdvice和@ExceptionHandler。这是代码:
@ControllerAdvice class:
@ControllerAdvice
public class MyAppExceptionHandler {
@ExceptionHandler({ NoSuchEntityException.class })
@ResponseStatus(value = HttpStatus.NOT_FOUND)
public @ResponseBody
ErrorDTO handleNotFoundException(Exception ex) throws IOException {
return new ErrorDTO.Builder().setStatus(HttpStatus.NOT_FOUND)
.setCause(ex.getClass().getName())
.setThrowable(ex).build();
}
}
在应用程序中使用它时一切正常 - 使用JSON解释完美地获得404响应,但在测试期间尝试使用它时 - 会发生不好的事情。
我的测试班:
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = { WebConfig.class })
@WebAppConfiguration
public class SomeTest {
@Mock
private SomeService service;
@InjectMocks
private SomeController controller;
private MockMvc mvc;
private ExceptionHandlerExceptionResolver createExceptionResolver() {
ExceptionHandlerExceptionResolver exceptionResolver = new ExceptionHandlerExceptionResolver() {
@Override
protected ServletInvocableHandlerMethod getExceptionHandlerMethod(
HandlerMethod handlerMethod, Exception exception) {
Method method = new ExceptionHandlerMethodResolver(
MyAppExceptionHandler.class).resolveMethod(exception);
return new ServletInvocableHandlerMethod(
new MyAppExceptionHandler(), method);
}
};
exceptionResolver.afterPropertiesSet();
return exceptionResolver;
}
@Before
public void setup() {
MockitoAnnotations.initMocks(this);
mvc = MockMvcBuilders.standaloneSetup(controller)
.setHandlerExceptionResolvers(createExceptionResolver())
.build();
}
@Test
public void thatExceptionHappens() throws Exception {
when(service.get(10)).thenThrow(new NoSuchEntityException(Some.class, 10));
mvc.perform(get("/api/some/10")).andExpect(status().isNotFound());
}
}
尝试运行时:
2014-07-15 19:35:01.376 [main] ERROR com.package.SomeTest$1 - Failed to invoke @ExceptionHandler method: public com.package.ErrorDTO com.package.MyAppExceptionHandler.handleNotFoundException(java.lang.Exception) throws java.io.IOException
org.springframework.web.HttpMediaTypeNotAcceptableException: Could not find acceptable representation
我认为可能在测试我的@ExceptionHandler时没有加载MappingJackson2HttpMessageConverter(但是它在WebConfig.class中配置,并且在尝试执行典型测试时 - 没有抛出任何异常 - 一切正常)。
提前感谢您的帮助。
答案 0 :(得分:14)
我不确定这是否是最好的解决方案(我想听听另一个), 但这就是我如何解决你面临的问题:
将此行添加到createExceptionResolver()
:
exceptionResolver.getMessageConverters().add(
new MappingJackson2HttpMessageConverter());
这样的事情:
private ExceptionHandlerExceptionResolver createExceptionResolver() {
ExceptionHandlerExceptionResolver exceptionResolver = new ExceptionHandlerExceptionResolver() {
@Override
protected ServletInvocableHandlerMethod getExceptionHandlerMethod(
HandlerMethod handlerMethod, Exception exception) {
Method method = new ExceptionHandlerMethodResolver(
MyAppExceptionHandler.class).resolveMethod(exception);
return new ServletInvocableHandlerMethod(
new MyAppExceptionHandler(), method);
}
};
exceptionResolver.getMessageConverters().add(new MappingJackson2HttpMessageConverter());
exceptionResolver.afterPropertiesSet();
return exceptionResolver;
}
由于某些我不知道的原因,Spring没有加载我的 MappingJackson2HttpMessageConverter 。
那条线解决了我的问题。
答案 1 :(得分:3)
根据定义,MockMvcBuilders standaloneSetup是手动的,这意味着它不是像Spring配置中的@ControllerAdvice那样发现感兴趣的Spring bean,而是让您手动设置测试所需的内容。相反,standaloneSetup应该让你手动注册@ControllerAdvice bean。有一张发生这种情况的票。请参阅https://jira.spring.io/browse/SPR-12751。