Spring Controller testing with path variable in the URL returning 404

[Ron Foster]

Hello,  

I am trying to write a unit test for my Spring controller using MockMvc. The issue is that if I have path variable in the URL I end up getting a 404.

Here is my controller code:  

@RestController
public InfoController {
    @GetMapping("/colorNames/{colorFamily}")
    public ResponseEntity<List<ColorNameFamilyDTO>> getColorNamesByColorFamily(@PathVariable String colorFamily)
   {
     List<ColorNameFamilyDTO> colorInformations = service.getColorNamesByColorFamily(colorFamily.toUpperCase());   
     return ResponseEntity.ok(colorInformations);
   }
} 


@RunWith(SpringRunner.class)
@WebMvcTest(InfoController.class)
public class InfoControllerTest {
   @Autowired
   private MockMvc mockMvc;

  @MockBean
  private InfoService service;

   @Autowired
   private ObjectMapper objectMapper;

   @Test
   public void testGetColorNamesByFamily() throws Exception
   {
      List<ColorNameFamilyDTO> colorInformations = new ArrayList<>();
    Mockito.when(service.getColorNamesByColorFamily(Mockito.anyString()))
    .thenReturn(colorInformations);
    mockMvc.perform(get("/colorNames/{colorFamily}", "Blue")).andExpect(status().isOk());
   }
}

I've tried use param, content type JSON and also specifying the string in the path directly. What's going wrong? Please suggest. I am unable to test any end point containing path variables, the ones request params and request bodies go fine. I'm using SpringBoot 2.1.3.RELEASE and Java 8.


This is what I see in the console:

MockHttpServletRequest:
  HTTP Method = GET
  Request URI = /colorNames/Blue
   Parameters = {}
      Headers = [Content-Type:"text/plain"]
         Body = <no character encoding set>
  Session Attrs = {}

Handler:
         Type = com.controller.Controller
       Method = public org.springframework.http.ResponseEntity<java.util.List<com.dto.ColorNameFamilyDTO>> com.controller.getColorNamesByColorFamily(java.lang.String)

 Async:
 Async started = false
 Async result = null

Resolved Exception:
         Type = null

ModelAndView:
    View name = null
         View = null
        Model = null

FlashMap:
   Attributes = null

MockHttpServletResponse:
       Status = 404
Error message = null
      Headers = []
 Content type = null
         Body = 
Forwarded URL = null
Redirected URL = null
      Cookies = []

[Himai Minh]

Hi, Ron,
I am not sure what happen and I am not familiar with Junit 4's RunWith.
But one thing you can try is to add @AutoConfigureMvc to ingest the MockMvc.
I guess your MockMvc is null in your code.