multipartfile controller unit test for medium

controllerTest.java

@RunWith(SpringRunner.class)
@WebMvcTest(UserController.class)
public class UserControllerTest {
    @Autowired
    MockMvc mockMvc;

    @MockBean
    UserService userService;

    @Test
    public void test() throws Exception {
        UserCreateRequest request = new UserCreateRequest();
        request.setName("test");
        request.setBirthDate(new Date());
        request.setGender("male");

        MockMultipartFile file =
                new MockMultipartFile(
                        "file",
                        "test contract.pdf",
                        MediaType.APPLICATION_PDF_VALUE,
                        "<<pdf data>>".getBytes(StandardCharsets.UTF_8));

        ObjectMapper objectMapper = new ObjectMapper();

        MockMultipartFile metadata =
                new MockMultipartFile(
                        "request",
                        "request",
                        MediaType.APPLICATION_JSON_VALUE,
                        objectMapper.writeValueAsString(request).getBytes(StandardCharsets.UTF_8));

        mockMvc.perform(
                multipart("/users/")
                        .file(file)
                        .file(metadata)
                        .accept(MediaType.APPLICATION_JSON))
                .andExpect(status().isOk())
                .andExpect(content().string("testcontract.pdf"));
    }
}