[kiworkshop#108] 범용게시판 만들기

- 범용게시판 CRUD 구현
- 서비스 테스트 작성

community-backend/app/app-monolith/src/main/java/org/kiworkshop/community/article/api/ArticleController.java

@@ -0,0 +1,37 @@
+package org.kiworkshop.community.article.api;
+
+import lombok.RequiredArgsConstructor;
+import org.kiworkshop.community.article.api.dto.ArticleRequestDto;
+import org.kiworkshop.community.article.api.dto.ArticleResponseDto;
+import org.kiworkshop.community.article.service.ArticleService;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+@RestController
+@RequestMapping("/article")
+@RequiredArgsConstructor
+public class ArticleController {
+    private final ArticleService articleService;
+
+    @GetMapping("/{id}")
+    public ResponseEntity<ArticleResponseDto> read(@PathVariable Long id) {
+        return ResponseEntity.ok(articleService.read(id));
+    }
+
+    @PostMapping
+    public ResponseEntity<Long> create(@RequestBody ArticleRequestDto articleRequestDto) {
+        return ResponseEntity.ok(articleService.create(articleRequestDto));
+    }
+
+    @DeleteMapping("/{id}")
+    public ResponseEntity<Void> delete(@PathVariable Long id) {
+        articleService.delete(id);
+        return ResponseEntity.ok().build();
+    }
+
+    @PutMapping("/{id}")
+    public ResponseEntity<Void> update(@PathVariable Long id, @RequestBody ArticleRequestDto articleRequestDto) {
+        articleService.update(id, articleRequestDto);
+        return ResponseEntity.ok().build();
+    }
+}

community-backend/app/app-monolith/src/main/java/org/kiworkshop/community/article/api/dto/ArticleRequestDto.java

@@ -0,0 +1,27 @@
+package org.kiworkshop.community.article.api.dto;
+
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import org.kiworkshop.community.article.entity.Article;
+
+@Getter
+@NoArgsConstructor
+public class ArticleRequestDto {
+    private String title;
+
+    @Builder
+    public ArticleRequestDto(String title, String content) {
+        this.title = title;
+        this.content = content;
+    }
+
+    private String content;
+
+    public Article toEntity() {
+        return Article.builder()
+                .title(title)
+                .content(content)
+                .build();
+    }
+}

community-backend/app/app-monolith/src/main/java/org/kiworkshop/community/article/api/dto/ArticleResponseDto.java

@@ -0,0 +1,26 @@
+package org.kiworkshop.community.article.api.dto;
+
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import org.kiworkshop.community.article.entity.Article;
+
+@Getter
+@NoArgsConstructor
+public class ArticleResponseDto {
+    private String title;
+    private String content;
+
+    @Builder
+    public ArticleResponseDto(String title, String content) {
+        this.title = title;
+        this.content = content;
+    }
+
+    public static ArticleResponseDto from(Article article) {
+        return ArticleResponseDto.builder()
+                .title(article.getTitle())
+                .content(article.getContent())
+                .build();
+    }
+}

community-backend/app/app-monolith/src/main/java/org/kiworkshop/community/article/entity/Article.java

@@ -0,0 +1,27 @@
+package org.kiworkshop.community.article.entity;
+
+import lombok.Builder;
+import lombok.Getter;
+import org.kiworkshop.community.common.domain.BaseEntity;
+
+import javax.persistence.Entity;
+
+@Entity
+@Getter
+public class Article extends BaseEntity {
+    private String title;
+    private String content;
+    private Long userId;
+
+    @Builder
+    public Article(String title, String content, Long userId) {
+        this.title = title;
+        this.content = content;
+        this.userId = userId;
+    }
+
+    public void update(Article article) {
+        this.title = article.title;
+        this.content = article.content;
+    }
+}

community-backend/app/app-monolith/src/main/java/org/kiworkshop/community/article/entity/ArticleRepository.java

@@ -0,0 +1,6 @@
+package org.kiworkshop.community.article.entity;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface ArticleRepository extends JpaRepository<Article, Long> {
+}

community-backend/app/app-monolith/src/main/java/org/kiworkshop/community/article/exception/ArticleException.java

@@ -0,0 +1,7 @@
+package org.kiworkshop.community.article.exception;
+
+public class ArticleException extends RuntimeException {
+    public ArticleException(String s) {
+        super(s);
+    }
+}

community-backend/app/app-monolith/src/main/java/org/kiworkshop/community/article/service/ArticleService.java

@@ -0,0 +1,38 @@
+package org.kiworkshop.community.article.service;
+
+import lombok.RequiredArgsConstructor;
+import org.kiworkshop.community.article.api.dto.ArticleRequestDto;
+import org.kiworkshop.community.article.api.dto.ArticleResponseDto;
+import org.kiworkshop.community.article.entity.Article;
+import org.kiworkshop.community.article.entity.ArticleRepository;
+import org.kiworkshop.community.article.exception.ArticleException;
+import org.springframework.stereotype.Service;
+
+@Service
+@RequiredArgsConstructor
+public class ArticleService {
+    private final ArticleRepository articleRepository;
+
+    public Long create(ArticleRequestDto articleRequestDto) {
+        Article article = articleRepository.save(articleRequestDto.toEntity());
+        return article.getId();
+    }
+
+    public ArticleResponseDto read(Long id) {
+        Article article = findById(id);
+        return ArticleResponseDto.from(article);
+    }
+
+    public void update(Long id, ArticleRequestDto articleRequestDto) {
+        Article article = findById(id);
+        article.update(articleRequestDto.toEntity());
+    }
+
+    public void delete(Long id) {
+        articleRepository.deleteById(id);
+    }
+
+    private Article findById(Long id) {
+        return articleRepository.findById(id).orElseThrow(() -> new ArticleException("게시물을 찾을 수 없습니다."));
+    }
+}

community-backend/app/app-monolith/src/test/java/org/kiworkshop/community/article/entity/ArticleTest.java

@@ -0,0 +1,15 @@
+package org.kiworkshop.community.article.entity;
+
+import org.springframework.test.util.ReflectionTestUtils;
+
+import java.time.ZonedDateTime;
+
+public class ArticleTest {
+    public static Article createArticleTestFixture() {
+        Article article = Article.builder().title("title").content("content").build();
+        ReflectionTestUtils.setField(article, "id", 1L);
+        ReflectionTestUtils.setField(article, "updatedAt", ZonedDateTime.now());
+        ReflectionTestUtils.setField(article, "createdAt", ZonedDateTime.now());
+        return article;
+    }
+}

community-backend/app/app-monolith/src/test/java/org/kiworkshop/community/article/service/ArticleServiceTest.java

@@ -0,0 +1,89 @@
+package org.kiworkshop.community.article.service;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.kiworkshop.community.article.api.dto.ArticleRequestDto;
+import org.kiworkshop.community.article.api.dto.ArticleResponseDto;
+import org.kiworkshop.community.article.entity.Article;
+import org.kiworkshop.community.article.entity.ArticleRepository;
+import org.kiworkshop.community.article.exception.ArticleException;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+import java.util.Optional;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.kiworkshop.community.article.entity.ArticleTest.createArticleTestFixture;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyLong;
+import static org.mockito.BDDMockito.given;
+import static org.mockito.BDDMockito.then;
+
+@ExtendWith(MockitoExtension.class)
+class ArticleServiceTest {
+    private ArticleService articleService;
+    @Mock
+    private ArticleRepository articleRepository;
+
+    @BeforeEach
+    void setUp() {
+        this.articleService = new ArticleService(articleRepository);
+    }
+
+    @Test
+    void create() {
+        //given
+        ArticleRequestDto articleRequestDto = ArticleRequestDto.builder().title("title").content("content").build();
+        Article article = createArticleTestFixture();
+        given(articleRepository.save(any(Article.class))).willReturn(article);
+        //when
+        Long id = articleService.create(articleRequestDto);
+        //then
+        assertThat(id).isNotNull();
+        then(articleRepository).should().save(any(Article.class));
+    }
+
+    @Test
+    void read() {
+        //given
+        Article article = createArticleTestFixture();
+        given(articleRepository.findById(anyLong())).willReturn(Optional.of(article));
+        //when
+        ArticleResponseDto articleResponseDto = articleService.read(1L);
+        //then
+        assertThat(articleResponseDto.getTitle()).isEqualTo(article.getTitle());
+        assertThat(articleResponseDto.getContent()).isEqualTo(article.getContent());
+        then(articleRepository).should().findById(anyLong());
+    }
+
+    @Test
+    void update() {
+        //given
+        ArticleRequestDto articleRequestDto = ArticleRequestDto.builder().title("title1").content("content1").build();
+        Article article = createArticleTestFixture();
+        given(articleRepository.findById(anyLong())).willReturn(Optional.of(article));
+        //when
+        articleService.update(1L, articleRequestDto);
+        //then
+        then(articleRepository).should().findById(anyLong());
+    }
+
+    @Test
+    void delete() {
+        //when
+        articleService.delete(1L);
+        //then
+        then(articleRepository).should().deleteById(anyLong());
+    }
+
+    @Test
+    void findByIdThrowsException() {
+        //given
+        ArticleRequestDto articleRequestDto = ArticleRequestDto.builder().title("title1").content("content1").build();
+        //when & then
+        assertThrows(ArticleException.class, () -> articleService.read(1L));
+        assertThrows(ArticleException.class, () -> articleService.update(1L, articleRequestDto));
+    }
+}