隔离控制器测试无法实例化Pageable

Question

我有一个Spring MVC控制器,它使用Spring-Data的分页支持:

@Controller
public class ModelController {

    private static final int DEFAULT_PAGE_SIZE = 50;

    @RequestMapping(value = "/models", method = RequestMethod.GET)
    public Page<Model> showModels(@PageableDefault(size = DEFAULT_PAGE_SIZE) Pageable pageable, @RequestParam(
            required = false) String modelKey) {

//..
        return models;
    }

}

我想使用漂亮的Spring MVC测试支持测试RequestMapping.为了使这些测试保持快速并与所有其他内容隔离开来,我不想创建完整的ApplicationContext:

public class ModelControllerWebTest {
    private MockMvc mockMvc;

    @Before
    public void setup() {
        ModelController controller = new ModelController();
        mockMvc = MockMvcBuilders.standaloneSetup(controller).build();
    }

    @Test
    public void reactsOnGetRequest() throws Exception {
        mockMvc.perform(get("/models")).andExpect(status().isOk());
    }

}

这种方法适用于其他控制器,它们不期望使用Pageable,但是有了这个,我得到了一个很好的长Spring堆栈跟踪.它抱怨无法实例化Pageable:

org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [org.springframework.data.domain.Pageable]: Specified class is an interface
at   
.... lots more lines

问题:如何更改我的测试,以便正确进行神奇的No-Request-Parameter-To-Pageable转换？

注意:在实际应用中,一切正常.

Answer 1

可分页的问题可以通过提供自定义参数处理程序来解决.如果设置了此项,您将在ViewResolver异常(循环)中运行.要避免这种情况,您必须设置ViewResolver(例如,匿名JSON ViewResolver类).

mockMvc = MockMvcBuilders.standaloneSetup(controller)
            .setCustomArgumentResolvers(new PageableHandlerMethodArgumentResolver())
            .setViewResolvers(new ViewResolver() {
                @Override
                public View resolveViewName(String viewName, Locale locale) throws Exception {
                    return new MappingJackson2JsonView();
                }
            })
            .build();

Answer 2

只需添加@EnableSpringDataWebSupport进行测试即可.而已.

Answer 3

对于春季启动，只需添加为我解决的ArgumentResolvers：

从触发错误的代码中：

this.mockMvc = MockMvcBuilders.standaloneSetup(weightGoalResource).build();

对此有效：

this.mockMvc = MockMvcBuilders.standaloneSetup(weightGoalResource)
            .setCustomArgumentResolvers(new PageableHandlerMethodArgumentResolver())
            .build();