Spring MVC controller Test - print the result JSON String

Question

Hi I have a Spring mvc controller

@RequestMapping(value = "/jobsdetails/{userId}", method = RequestMethod.GET)
@ResponseBody
public List<Jobs> jobsDetails(@PathVariable Integer userId,HttpServletResponse response) throws IOException {
    try {       
        Map<String, Object> queryParams=new LinkedHashMap<String, Object>(); 

        queryParams.put("userId", userId);

        jobs=jobsService.findByNamedQuery("findJobsByUserId", queryParams);

    } catch(Exception e) {
        logger.debug(e.getMessage());
        response.sendError(HttpServletResponse.SC_BAD_REQUEST);
    }
    return jobs;
}

I want to see how the JSON String will looks like when I run this. I wrote this test case

@RunWith(SpringJUnit4ClassRunner.class)
@WebAppConfiguration("classpath:webapptest")
@ContextConfiguration(locations = {"classpath:test-applicationcontext.xml"})
public class FindJobsControllerTest {
private MockMvc springMvc;

    @Autowired
    WebApplicationContext wContext;

    @Before
    public void init() throws Exception {
        springMvc = MockMvcBuilders.webAppContextSetup(wContext).build();
    }

    @Test
    public void documentsPollingTest() throws Exception {
        ResultActions resultActions = springMvc.perform(MockMvcRequestBuilders.get("/jobsdetails/2").accept(MediaType.APPLICATION_JSON));

        System.out.println(/* Print the JSON String */); //How ?
    }
}

How to get the JSON string?

I am using Spring 3, codehause Jackson 1.8.4

Solution 1

Try this code:

resultActions.andDo(MockMvcResultHandlers.print());

Solution 2

The trick is to use andReturn()

MvcResult result = springMvc.perform(MockMvcRequestBuilders
         .get("/jobsdetails/2").accept(MediaType.APPLICATION_JSON)).andReturn();

String content = result.getResponse().getContentAsString();

Solution 3

You can enable printing response of each test method when setting up the MockMvc instance.

springMvc = MockMvcBuilders.webAppContextSetup(wContext)
               .alwaysDo(MockMvcResultHandlers.print())
               .build();

Notice the .alwaysDo(MockMvcResultHandlers.print()) part of the above code. This way you can avoid applying print handler for each test method.

Solution 4

For me it worked when I used the code below:

ResultActions result =
     this.mockMvc.perform(post(resource).sessionAttr(Constants.SESSION_USER, user).param("parameter", "parameterValue"))
        .andExpect(status().isOk());
String content = result.andReturn().getResponse().getContentAsString();

And it worked !! :D

Hope I can help the other with my answer

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Comments

[jax]

Actually you can get the JSON response from the controller using .andReturn()

[funkygono]

Oh yes, that's true, I just saw this in your answer. I didn't know Spring offered so much mocks, that's very great.

[delucasvb]

Thank you for not just using print() but adding its class name, unlike many other search results!