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Test: 테스트 작성
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‎src/main/java/com/back/domain/board/entity/PostCategory.java‎

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import lombok.Getter;
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import lombok.NoArgsConstructor;
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import java.util.ArrayList;
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import java.util.List;
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@Entity
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@OneToMany(mappedBy = "category", cascade = CascadeType.ALL, orphanRemoval = true)
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private List<PostCategoryMapping> postCategoryMappings;
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// -------------------- 생성자 --------------------
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public PostCategory(String name) {
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this.name = name;
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this.postCategoryMappings = new ArrayList<>();
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}
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}

‎src/test/java/com/back/domain/board/controller/PostControllerTest.java‎

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package com.back.domain.board.controller;
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import com.back.domain.board.dto.PostRequest;
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import com.back.domain.board.entity.PostCategory;
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import com.back.domain.board.repository.PostCategoryRepository;
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import com.back.domain.user.entity.User;
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import com.back.domain.user.entity.UserProfile;
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import com.back.domain.user.entity.UserStatus;
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import com.back.domain.user.repository.UserRepository;
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import com.back.fixture.TestJwtTokenProvider;
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import com.fasterxml.jackson.databind.ObjectMapper;
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import org.junit.jupiter.api.DisplayName;
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import org.junit.jupiter.api.Test;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
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import org.springframework.boot.test.context.SpringBootTest;
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import org.springframework.http.MediaType;
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import org.springframework.security.crypto.password.PasswordEncoder;
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import org.springframework.test.context.ActiveProfiles;
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import org.springframework.test.web.servlet.MockMvc;
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import org.springframework.test.web.servlet.ResultActions;
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import org.springframework.transaction.annotation.Transactional;
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import java.time.LocalDate;
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import java.util.List;
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import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;
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import static org.springframework.test.web.servlet.result.MockMvcResultHandlers.print;
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import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.*;
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@SpringBootTest
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@AutoConfigureMockMvc
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@ActiveProfiles("test")
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@Transactional
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class PostControllerTest {
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@Autowired
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private MockMvc mvc;
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@Autowired
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private UserRepository userRepository;
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@Autowired
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private PostCategoryRepository postCategoryRepository;
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@Autowired
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private TestJwtTokenProvider testJwtTokenProvider;
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@Autowired
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private PasswordEncoder passwordEncoder;
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@Autowired
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private ObjectMapper objectMapper;
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private String generateAccessToken(User user) {
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return testJwtTokenProvider.createAccessToken(user.getId(), user.getUsername(), user.getRole().name());
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}
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// ====================== 게시글 생성 테스트 ======================
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@Test
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@DisplayName("게시글 생성 성공 → 201 Created")
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void createPost_success() throws Exception {
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// given: 정상 유저 생성
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User user = User.createUser("writer", "[email protected]", passwordEncoder.encode("P@ssw0rd!"));
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user.setUserProfile(new UserProfile(user, "홍길동", null, "소개글", LocalDate.of(2000, 1, 1), 1000));
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user.setUserStatus(UserStatus.ACTIVE);
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userRepository.save(user);
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String accessToken = generateAccessToken(user);
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// 카테고리 등록
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PostCategory c1 = new PostCategory("공지사항");
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postCategoryRepository.save(c1);
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PostCategory c2 = new PostCategory("자유게시판");
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postCategoryRepository.save(c2);
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PostRequest request = new PostRequest("첫 번째 게시글", "안녕하세요, 첫 글입니다!", List.of(c1.getId(), c2.getId()));
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// when
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ResultActions resultActions = mvc.perform(
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post("/api/posts")
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.header("Authorization", "Bearer " + accessToken)
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.contentType(MediaType.APPLICATION_JSON)
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.content(objectMapper.writeValueAsString(request))
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).andDo(print());
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// then
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resultActions
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.andExpect(status().isCreated())
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.andExpect(jsonPath("$.success").value(true))
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.andExpect(jsonPath("$.code").value("SUCCESS_200"))
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.andExpect(jsonPath("$.data.title").value("첫 번째 게시글"))
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.andExpect(jsonPath("$.data.author.nickname").value("홍길동"))
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.andExpect(jsonPath("$.data.categories.length()").value(2));
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}
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@Test
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@DisplayName("존재하지 않는 사용자 → 404 Not Found")
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void createPost_userNotFound() throws Exception {
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// given: 토큰만 발급(실제 DB엔 없음)
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String fakeToken = testJwtTokenProvider.createAccessToken(999L, "ghost", "USER");
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PostRequest request = new PostRequest("제목", "내용", null);
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// when & then
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mvc.perform(post("/api/posts")
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.header("Authorization", "Bearer " + fakeToken)
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.contentType(MediaType.APPLICATION_JSON)
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.content(objectMapper.writeValueAsString(request)))
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.andDo(print())
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.andExpect(status().isNotFound())
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.andExpect(jsonPath("$.code").value("USER_001"))
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.andExpect(jsonPath("$.message").value("존재하지 않는 사용자입니다."));
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}
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@Test
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@DisplayName("존재하지 않는 카테고리 → 404 Not Found")
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void createPost_categoryNotFound() throws Exception {
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// given: 정상 유저
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User user = User.createUser("writer2", "[email protected]", passwordEncoder.encode("P@ssw0rd!"));
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user.setUserProfile(new UserProfile(user, "작성자", null, null, null, 0));
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user.setUserStatus(UserStatus.ACTIVE);
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userRepository.save(user);
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String accessToken = generateAccessToken(user);
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// 존재하지 않는 카테고리 ID
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PostRequest request = new PostRequest("제목", "내용", List.of(999L));
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// when & then
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mvc.perform(post("/api/posts")
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.header("Authorization", "Bearer " + accessToken)
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.contentType(MediaType.APPLICATION_JSON)
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.content(objectMapper.writeValueAsString(request)))
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.andDo(print())
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.andExpect(status().isNotFound())
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.andExpect(jsonPath("$.code").value("POST_003"))
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.andExpect(jsonPath("$.message").value("존재하지 않는 카테고리입니다."));
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}
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@Test
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@DisplayName("잘못된 요청(필드 누락) → 400 Bad Request")
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void createPost_badRequest() throws Exception {
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// given: 정상 유저 생성
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User user = User.createUser("writer", "[email protected]", passwordEncoder.encode("P@ssw0rd!"));
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user.setUserProfile(new UserProfile(user, "홍길동", null, "소개글", LocalDate.of(2000, 1, 1), 1000));
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user.setUserStatus(UserStatus.ACTIVE);
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userRepository.save(user);
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String accessToken = generateAccessToken(user);
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// given: title 누락
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String invalidJson = """
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{
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"content": "본문만 있음"
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}
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""";
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// when & then
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mvc.perform(post("/api/posts")
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.header("Authorization", "Bearer " + accessToken)
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.contentType(MediaType.APPLICATION_JSON)
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.content(invalidJson))
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.andDo(print())
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.andExpect(status().isBadRequest())
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.andExpect(jsonPath("$.code").value("COMMON_400"))
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.andExpect(jsonPath("$.message").value("잘못된 요청입니다."));
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}
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}

‎src/test/java/com/back/domain/board/service/PostServiceTest.java‎

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package com.back.domain.board.service;
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import com.back.domain.board.dto.PostRequest;
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import com.back.domain.board.dto.PostResponse;
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import com.back.domain.board.entity.PostCategory;
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import com.back.domain.board.repository.PostCategoryRepository;
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import com.back.domain.board.repository.PostRepository;
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import com.back.domain.user.entity.User;
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import com.back.domain.user.entity.UserProfile;
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import com.back.domain.user.entity.UserStatus;
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import com.back.domain.user.repository.UserRepository;
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import com.back.global.exception.CustomException;
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import com.back.global.exception.ErrorCode;
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import org.junit.jupiter.api.DisplayName;
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import org.junit.jupiter.api.Test;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.boot.test.context.SpringBootTest;
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import org.springframework.test.context.ActiveProfiles;
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import org.springframework.transaction.annotation.Transactional;
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import java.util.List;
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import static org.assertj.core.api.Assertions.*;
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@SpringBootTest
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@Transactional
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@ActiveProfiles("test")
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class PostServiceTest {
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@Autowired
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private PostService postService;
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@Autowired
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private PostRepository postRepository;
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@Autowired
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private UserRepository userRepository;
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@Autowired
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private PostCategoryRepository postCategoryRepository;
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// ====================== 게시글 생성 테스트 ======================
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@Test
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@DisplayName("게시글 생성 성공 - 카테고리 포함")
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void createPost_success_withCategories() {
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// given: 유저 + 카테고리 저장
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User user = User.createUser("writer", "[email protected]", "encodedPwd");
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user.setUserProfile(new UserProfile(user, "작성자", null, null, null, 0));
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user.setUserStatus(UserStatus.ACTIVE);
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userRepository.save(user);
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PostCategory category = new PostCategory("공지");
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postCategoryRepository.save(category);
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PostRequest request = new PostRequest("제목", "내용", List.of(category.getId()));
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// when
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PostResponse response = postService.createPost(request, user.getId());
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// then
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assertThat(response.title()).isEqualTo("제목");
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assertThat(response.content()).isEqualTo("내용");
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assertThat(response.author().nickname()).isEqualTo("작성자");
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assertThat(response.categories()).hasSize(1);
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assertThat(response.categories().get(0).name()).isEqualTo("공지");
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}
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@Test
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@DisplayName("게시글 생성 실패 - 존재하지 않는 유저")
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void createPost_fail_userNotFound() {
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// given
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PostRequest request = new PostRequest("제목", "내용", null);
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// when & then
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assertThatThrownBy(() -> postService.createPost(request, 999L))
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.isInstanceOf(CustomException.class)
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.hasMessage(ErrorCode.USER_NOT_FOUND.getMessage());
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}
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@Test
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@DisplayName("게시글 생성 실패 - 존재하지 않는 카테고리 ID 포함")
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void createPost_fail_categoryNotFound() {
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// given: 유저는 정상
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User user = User.createUser("writer2", "[email protected]", "encodedPwd");
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user.setUserProfile(new UserProfile(user, "작성자2", null, null, null, 0));
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user.setUserStatus(UserStatus.ACTIVE);
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userRepository.save(user);
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// 실제 저장 안 된 카테고리 ID 요청
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PostRequest request = new PostRequest("제목", "내용", List.of(100L, 200L));
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// when & then
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assertThatThrownBy(() -> postService.createPost(request, user.getId()))
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.isInstanceOf(CustomException.class)
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.hasMessage(ErrorCode.CATEGORY_NOT_FOUND.getMessage());
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}
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}

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