test.java

@RunWith(SpringRunner.class)
@SpringBootTest
@AutoConfigureMockMvc
public class UserControllerTests {
  
  // injection 코드들 생략...
  
  @Test
  public void 인자가_아무것도_없을때_400() throws Exception {
    this.mockMvc.perform(post("/user/signup"))
        .andExpect(status().isBadRequest());
  }
  
  @Test
  public void 골뱅이가 없는 이메일_format_400() throws Exception {
    UserSaveDto userSaveDto = new UserSaveDto();
    userSaveDto.setUsername("hjh");
    userSaveDto.setAddress("seoul");
    userSaveDto.setPassword("123456");
    userSaveDto.setEmail("hjh544");
    userSaveDto.setProvider(Provider.create("test"));

    this.mockMvc.perform(
        post("/user/signup")
            .contentType(MediaType.APPLICATION_JSON_UTF8)
            .content(objectMapper.writeValueAsString(userSaveDto)))
        .andExpect(status().isBadRequest());
  }

}