Spring Junit with session object - not visible in Controller

Question

Simple Test class have the following:

@Autowired
private WebApplicationContext wac;
@Autowired
MockHttpSession session;
private MockMvc mockMvc;

@Before
public void before() {
    this.mockMvc = MockMvcBuilders.webAppContextSetup(this.wac).build();
}

@Test
public void testSetSomeType() throws Exception {
    this.session.putValue("PREV_PAGE_VAL", "FOO");
    System.out.println(this.session.getAttribute("PREV_PAGE_VAL")); //FOO is there, so far so good, but in the controller, its null
    RequestBuilder requestBuilder = MockMvcRequestBuilders.post("/setSomeType").param("someType", "ACCESS_ONLY").session(session)
                .accept(MediaType.parseMediaType("application/json;charset=UTF-8"));
    ResultActions result = this.mockMvc.perform(requestBuilder);
        result.andExpect(MockMvcResultMatchers.status().isOk());
}

..

And the Controller class has the following:

@RequestMapping(value = "/setSomeType", method = RequestMethod.POST)
public @ResponseBody AppResponse setSomeType(@RequestParam(value = "someType") final String someType, final HttpSession session) {
    //someType has "ACCESS_ONLY"
    //session.getAttribute("PREV_PAGE_VAL"); is null, expecting FOO
}

Question: Why is session not having the FOO? What is missing? ..

Answer 1

I don't think Spring can automatically link a MockHttpSession (I also don't know where you're autowiring it from).

You can add it manually.

RequestBuilder requestBuilder = MockMvcRequestBuilders.post("/setSomeType")
            .param("someType", "ACCESS_ONLY")
            .accept(MediaType.parseMediaType("application/json;charset=UTF-8"))
            .session(session);

Alternatively, you can use sessionAttr(String, Object) to add session attributes individually.