Test

@RunWith(SpringJUnit4ClassRunner.class)
@SpringApplicationConfiguration(classes = Application.class)
@WebAppConfiguration
@IntegrationTest("server.port:0")
public class UserTest {

	@Autowired
	private WebApplicationContext webApplicationContext;
	
	@Autowired
	private UserRepository userRepository;
	
	@Autowired
	private UserInfoRepository userInfoRepository;
	
	private MockMvc mockMvc;
	
	@Before
	public void before(){
		this.mockMvc = MockMvcBuilders.webAppContextSetup(this.webApplicationContext).build();
	}
	
	@Test
	public void test() throws Exception {
		// create temporary user for test.
		User user = new User();
		user.setType(Type.User);
		
		UserInfo userInfo = new UserInfo();
		userInfo.setEmail("temporary_user@test.com");
		userInfo.setUser(user);
		
		user.setUserInfo(userInfo);
		// persist
		userRepository.save(user);
		
		// request post
		mockMvc.perform(
				post("/user")
				.param("email", "temporary_user@test.com")
				.contentType(MediaType.APPLICATION_JSON_UTF8_VALUE))
					.andDo(print());
	}
}

User

@Entity
@Table(name = "USER")
@Data
public class User {
	
  @Id
  @GeneratedValue(strategy = GenerationType.IDENTITY)
  @Column(name = "UNO")
  private Long userNo;
    
  @Column(name = "USER_TYPE")
  @Enumerated(EnumType.STRING)
  private USER_TYPE type; 
    
  @OneToOne(mappedBy = "user", cascade = CascadeType.ALL)
  private UserInfo userInfo;

}

UserInfo

@Entity
@Table(name = "USER_INFO")
@Data
public class UserInfo {
    
  @Id
  private Long userNo;
	
  @Column(name = "EMAIL")
  private String email;
    
  @MapsId
  @OneToOne(cascade = CascadeType.ALL)
  @JoinColumn(name = "UNO")
  private User user;
    
}