@Autowire MockMvc - Spring Data Rest

Question

Given the Repository

public interface ResourceRepository extends CrudRepository<Resource, Long> { ... }

The following test code:

@WebMvcTest
@RunWith(SpringRunner.class)
public class RestResourceTests {

  @Autowired
  private MockMvc mockMvc;

  @Test
  public void create_ValidResource_Should201() {
    String requestJson = "...";

    mockMvc.perform(
      post("/resource")
        .content(requestJson)
        .contentType(MediaType.APPLICATION_JSON))
      .andExpect(status().isCreated()); // This fails with 404
  }

}

In order to fix the issue, I need to inject the WebApplicationContext and manually create the MockMvc object as follows:

@SpringBootTest
@RunWith(SpringRunner.class)
public class RestResourceTests {

  private MockMvc mockMvc;

  @Autowired
  private WebApplicationContext webApplicationContext;

  @Before
  public void setup() {
    this.mockMvc = webAppContextSetup(webApplicationContext).build();
  }

Is there a simpler way to achieve this?

Thanks!

That's how I've always done it. Usually I have one abstract class to setup the MockMvc instance since I also apply some security filters, and restdoc configurations. — aglassman, Feb 02 '18 at 19:53
can you set debug logging for spring web and/or post the controller too? Should be no real difference between the two. — Darren Forsythe, Feb 02 '18 at 19:57
Pure `@RestController` or `@Controller` instances work just fine, it's when you involve resources exposed through Spring Data Rest. — dardo, Feb 02 '18 at 19:58
There is no controller per se, I added an example Spring Data Repository — dardo, Feb 02 '18 at 20:19
Basically, if you use a `RestRepository`, you can't use `@WebMvcTest` to auto inject `MockMvc`, you need to inject `WebApplicationContext` and create the `MockMvc` manually. Given this is Spring Boot, it should 'just work'. — dardo, Feb 02 '18 at 23:18

score 10 · Accepted Answer · answered Feb 05 '18 at 15:52

I figured out a "clean" solution, but it feels like a bug to me.

@SpringBootTest
@RunWith(SpringRunner.class)
@AutoConfigureMockMvc // <-- this is the fix 
public class RestResourceTests {

  @Autowired
  private MockMvc mockMvc; // <-- now injects with repositories wired.

The reason I feel like this is a bug, the @WebMvcTest annotation already places the @AutoConfigureMockMvc annotation on the class under test.

It feels like @WebMvcTest isn't looking at the web components loaded with @RestRepository.

The documentation is very specific with that. – kinich49 Feb 23 '18 at 22:05 — kinich49, Feb 23 '18 at 22:05

@Autowire MockMvc - Spring Data Rest

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