mockMvc - Test Error Message

Question

Does anybody have any tips, or does anybody know how I can test the "error message" returned by the HTTP response object?

@Autowired
private WebApplicationContext ctx;

private MockMvc mockMvc;

@Before
public void setUp() throws Exception {
    mockMvc = MockMvcBuilders.webAppContextSetup(ctx).build();
}

Response:

MockHttpServletResponse:
              Status = 200
       Error message = null
             Headers = {Content-Type=[application/json;charset=UTF-8]}
        Content type = application/json;charset=UTF-8

Answer 1

You can use the method status.reason().

For example:

     @Test      public void loginWithBadCredentials() {         this.mockMvc.perform(                 post("/rest/login")                         .contentType(MediaType.APPLICATION_JSON)                         .content("{\"username\": \"baduser\", \"password\": \"invalidPassword\"}")                 )                 .andDo(MockMvcResultHandlers.print())                 .andExpect(status().isUnauthorized())                 .andExpect(status().reason(containsString("Bad credentials")))                 .andExpect(unauthenticated());     }       MockHttpServletResponse:                   Status = 401            Error message = Authentication Failed: Bad credentials             Content type = null                     Body =             Forwarded URL = null           Redirected URL = null                  Cookies = [] 

Answer 2

Even simpler:

String error =  mockMvc...     .andExpect(status().isUnauthorized())     .andReturn().getResolvedException().getMessage();  assertTrue(StringUtils.contains(error, "Bad credentials")); 

Answer 3

This is the solution I found using JsonPath and MockMvc

this.mvc.perform(post(BASE_URL).contentType(MediaType.APPLICATION_JSON).content(responseJson)).andDo(print())
.andExpect(status().is5xxServerError())
.andExpect(jsonPath("$.message", is("There is an error while executing this test request ")));

Hope this helps.