由于找不到模型属性而通过了Spring MVC Controller测试

Question

I have created the Home Controller below. This controller fetches the 5 dummy posts I have created in the "PostRepository" class through PostService class.

@Controller
public class HomeController {

    @Autowired
    PostService postService;

    @RequestMapping("/")
    public String getHome(Model model){
        model.addAttribute("Post", postService);

        return "home";
    }
}

I have implemented the following test..

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = {WebConfig.class})
@WebAppConfiguration
public class ControllerTest {

    @Test //Test the Home Controller
    public void TestHomePage() throws Exception{
        HomeController homeController = new HomeController();
        MockMvc mockMvc = standaloneSetup(homeController).build();

        mockMvc.perform(get("/"))
                .andExpect(view().name("home"))
                .andExpect(model().attributeDoesNotExist("Post"));
    }

}

The test has successfully passed. But the attribute should exist.

Answer 1

You are mixing two incompatible features of Spring's testing support.

If you instantiate the controller within the test, you need to use MockMvcBuilders.standaloneSetup() .

If you are using the Spring TestContext Framework (ie, @ContextConfiguration , etc.), then you need to use MockMvcBuilders.webAppContextSetup() .

Thus, the following is the appropriate configuration for your test.

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = WebConfig.class)
@WebAppConfiguration
public class ControllerTest {

    @Autowired
    WebApplicationContext wac;

    @Autowired
    PostService postService;

    @Test
    public void TestHomePage2() throws Exception {
        MockMvc mockMvc = MockMvcBuilders.webAppContextSetup(wac).build();

        mockMvc.perform(get("/"))
                .andExpect(view().name("home"))
                .andExpect(model().attribute("Post",postService));
    }
}

Regards,

Sam ( author of the Spring TestContext Framework )

Answer 2

如果那是完整的代码，那么您就丢失了

@RunWith(SpringJUnit4ClassRunner.class)