Spring mvc SpringMVC控制器异常测试

我有以下代码

@RequestMapping(value = "admin/category/edit/{id}",method = RequestMethod.GET)
public String editForm(Model model,@PathVariable Long id) throws NotFoundException{
    Category category=categoryService.findOne(id);
    if(category==null){
        throw new NotFoundException();
    }

    model.addAttribute("category", category);
    return "edit";
}

我试图在抛出NotFoundException时进行单元测试，所以我编写如下代码

@Test(expected = NotFoundException.class)
public void editFormNotFoundTest() throws Exception{

    Mockito.when(categoryService.findOne(1L)).thenReturn(null);
    mockMvc.perform(get("/admin/category/edit/{id}",1L));
}

Mockito.when(categoryService.findOne(1L)).thenThrow(new NotFoundException("Message"));

但失败了。 有没有关于如何测试异常的建议

或者我应该在CategoryService中抛出异常，以便执行类似的操作

@Test(expected = NotFoundException.class)
public void editFormNotFoundTest() throws Exception{

    Mockito.when(categoryService.findOne(1L)).thenReturn(null);
    mockMvc.perform(get("/admin/category/edit/{id}",1L));
}

Mockito.when(categoryService.findOne(1L)).thenThrow(new NotFoundException("Message"));

---

我终于解决了。因为我在spring mvc控制器测试中使用独立设置，所以我需要在每个需要执行异常检查的控制器单元测试中创建HandlerExceptionResolver

mockMvc= MockMvcBuilders.standaloneSetup(adminCategoryController).setSingleView(view)
            .setValidator(validator()).setViewResolvers(viewResolver())
            .setHandlerExceptionResolvers(getSimpleMappingExceptionResolver()).build();

然后是要测试的代码

@Test
public void editFormNotFoundTest() throws Exception{

    Mockito.when(categoryService.findOne(1L)).thenReturn(null);
    mockMvc.perform(get("/admin/category/edit/{id}",1L))
            .andExpect(view().name("404s"))
            .andExpect(forwardedUrl("/WEB-INF/jsp/404s.jsp"));
}

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什么是getSimpleMappingExceptionResolver（）实现？我发现了以下内容：。看起来，org.springframework.web.servlet.handler.SimpleMappingExceptionResolver已经是一个Springclass@josete域名已更改