통합 테스트: @SpringBootTest

@SpringBootTest
@AutoConfigureMockMvc
@ActiveProfiles("test")
class UserControllerIntegrationTest {

    @Autowired MockMvc mockMvc;
    @Autowired ObjectMapper objectMapper;
    @Autowired UserRepository userRepository;

    @BeforeEach
    void setUp() {
        userRepository.deleteAll();
    }

    @Test
    void signup_returns_201() throws Exception {
        SignupRequest req = new SignupRequest(
            "alice@example.com", "Pass1234", "Alice"
        );

        mockMvc.perform(post("/api/users")
                .contentType(MediaType.APPLICATION_JSON)
                .content(objectMapper.writeValueAsString(req)))
            .andExpect(status().isCreated())
            .andExpect(jsonPath("$.email").value("alice@example.com"))
            .andExpect(jsonPath("$.name").value("Alice"))
            .andDo(print());
    }

    @Test
    void signup_invalid_email_returns_400() throws Exception {
        SignupRequest req = new SignupRequest(
            "invalid-email", "Pass1234", "Alice"
        );

        mockMvc.perform(post("/api/users")
                .contentType(MediaType.APPLICATION_JSON)
                .content(objectMapper.writeValueAsString(req)))
            .andExpect(status().isBadRequest())
            .andExpect(jsonPath("$.errors.email").exists());
    }
}

spring:
  datasource:
    url: jdbc:h2:mem:testdb
    driver-class-name: org.h2.Driver
    username: sa
    password:
  jpa:
    hibernate:
      ddl-auto: create-drop
    show-sql: true

@SpringBootTest(webEnvironment = WebEnvironment.RANDOM_PORT)
@ActiveProfiles("test")
class UserApiE2ETest {

    @Autowired TestRestTemplate restTemplate;
    @LocalServerPort int port;

    @Test
    void full_signup_flow() {
        SignupRequest req = new SignupRequest(
            "alice@example.com", "Pass1234", "Alice"
        );

        ResponseEntity<UserDto> response = restTemplate.postForEntity(
            "/api/users", req, UserDto.class
        );

        assertEquals(HttpStatus.CREATED, response.getStatusCode());
        assertEquals("alice@example.com", response.getBody().email());

        // 후속 — 등록된 사용자 조회
        ResponseEntity<UserDto> get = restTemplate.getForEntity(
            "/api/users/" + response.getBody().id(),
            UserDto.class
        );
        assertEquals(HttpStatus.OK, get.getStatusCode());
    }
}

@WebMvcTest(UserController.class)
class UserControllerTest {

    @Autowired MockMvc mockMvc;
    @MockBean UserService userService;
    @Autowired ObjectMapper objectMapper;

    @Test
    void getUser_returns_200() throws Exception {
        UserDto dto = new UserDto(1L, "alice@example.com", "Alice", "USER", LocalDateTime.now());
        when(userService.findById(1L)).thenReturn(dto);

        mockMvc.perform(get("/api/users/1"))
            .andExpect(status().isOk())
            .andExpect(jsonPath("$.email").value("alice@example.com"));
    }
}


// @DataJpaTest — Repository만
@DataJpaTest
class UserRepositoryTest {
    @Autowired UserRepository userRepository;

    @Test
    void findByEmail_returns_user() {
        User user = User.builder().email("alice@example.com").build();
        userRepository.save(user);

        Optional<User> found = userRepository.findByEmail("alice@example.com");
        assertTrue(found.isPresent());
    }
}