#24 - 게시글 서비스 로직의 테스트와 골격 잡기

* 게시글 검색하면 게시글 리스트 반환
* 게시글을 ID로 조회
* 게시글 생성
* 게시글 수정
* 게시글 삭제

* 수정 필요
필요한 dto 와 enum을 함께 작성했는데 반영 해야함

src/main/java/com/example/boardproject/domain/type/SearchType.java

@@ -0,0 +1,5 @@
+package com.example.boardproject.domain.type;
+
+public enum SearchType {
+    TITLE, CONTENT, ID, NICKNAME, HASHTAG
+}

src/main/java/com/example/boardproject/dto/ArticleDto.java

@@ -0,0 +1,20 @@
+package com.example.boardproject.dto;
+
+import java.time.LocalDateTime;
+
+public record ArticleDto(
+        LocalDateTime createdAt,
+        String createdBy,
+        String title,
+        String content,
+        String hashtag
+) {
+    public static ArticleDto of(LocalDateTime createdAt,
+                                String createdBy,
+                                String title,
+                                String content,
+                                String hashtag) {
+        return new ArticleDto(createdAt, createdBy, title, content, hashtag);
+    }
+
+}

src/main/java/com/example/boardproject/dto/ArticleUpdateDto.java

@@ -0,0 +1,11 @@
+package com.example.boardproject.dto;
+
+public record ArticleUpdateDto(
+        String title,
+        String content,
+        String hashtag
+) {
+    public static ArticleUpdateDto of(String title, String content, String hashtag) {
+        return new ArticleUpdateDto(title, content, hashtag);
+    }
+}

src/main/java/com/example/boardproject/service/ArticleService.java

@@ -0,0 +1,37 @@
+package com.example.boardproject.service;
+
+import com.example.boardproject.domain.type.SearchType;
+import com.example.boardproject.dto.ArticleDto;
+import com.example.boardproject.dto.ArticleUpdateDto;
+import com.example.boardproject.repository.ArticleRepository;
+import lombok.RequiredArgsConstructor;
+import org.springframework.data.domain.Page;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+@RequiredArgsConstructor
+@Transactional
+@Service
+public class ArticleService {
+
+    private final ArticleRepository articleRepository;
+
+    @Transactional(readOnly = true)
+    public Page<ArticleDto> searchArticles(SearchType title, String searchKeyword) {
+        return Page.empty();
+    }
+
+    @Transactional(readOnly = true)
+    public ArticleDto searchArticle(long articleId) {
+        return null;
+    }
+
+    public void saveArticle(ArticleDto dto) {
+    }
+
+    public void updateArticle(long articleId, ArticleUpdateDto dto) {
+    }
+
+    public void deleteArticle(long articleId) {
+    }
+}

src/test/java/com/example/boardproject/service/ArticleServiceTest.java

@@ -0,0 +1,97 @@
+package com.example.boardproject.service;
+
+import com.example.boardproject.domain.Article;
+import com.example.boardproject.domain.type.SearchType;
+import com.example.boardproject.dto.ArticleDto;
+import com.example.boardproject.dto.ArticleUpdateDto;
+import com.example.boardproject.repository.ArticleRepository;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+import org.springframework.data.domain.Page;
+
+import java.time.LocalDateTime;
+
+import static org.assertj.core.api.Assertions.*;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.BDDMockito.*;
+
+@DisplayName("비즈니스 로직 - 게시글")
+@ExtendWith(MockitoExtension.class)
+class ArticleServiceTest {
+
+    // sut: system under test
+    // @InjectMocks 은 온전히 생성자 주입은 어려움 Target: Field
+    @InjectMocks
+    private ArticleService sut;
+
+    @Mock
+    private ArticleRepository articleRepository;
+
+    @DisplayName("게시글을 검색하면, 게시글 리스트로 반환한다.")
+    @Test
+    void givenSearchParameters_whenSearchingArticles_thenReturnsArticleList() {
+        // Given
+
+        // When
+        Page<ArticleDto> articles = sut.searchArticles(SearchType.TITLE, "search keyword");
+
+        // Then
+        assertThat(articles).isNotNull();
+    }
+
+    @DisplayName("게시글을 조회하면, 게시글을 반환한다.")
+    @Test
+    void givenId_whenSearchingArticle_thenReturnsArticle() {
+        // Given
+
+        // When
+        ArticleDto article = sut.searchArticle(1L);
+
+        // Then
+        assertThat(article).isNotNull();
+    }
+
+    @DisplayName("게시글을 정보를 입력하면, 게시글을 생성한다.")
+    @Test
+    void givenArticleInfo_whenSavingArticle_thenSavesArticle() {
+        // Given
+        given(articleRepository.save(any(Article.class))).willReturn(null);
+
+        // When
+        sut.saveArticle(ArticleDto.of(LocalDateTime.now(), "Jm", "title", "content", "hashtag"));
+
+        // Then
+        then(articleRepository).should().save(any(Article.class));
+    }
+
+    @DisplayName("게시글을 ID와 수정 정보를 입력하면, 게시글을 수정한다.")
+    @Test
+    void givenArticleIdAndModifiedInfo_whenUpdatingArticle_thenUpdatesArticle() {
+        // Given
+        given(articleRepository.save(any(Article.class))).willReturn(null);
+
+        // When
+        sut.updateArticle(1L, ArticleUpdateDto.of("title", "content", "#java"));
+
+        // Then
+        then(articleRepository).should().save(any(Article.class));
+    }
+
+    @DisplayName("게시글을 ID를 입력하면, 게시글을 삭제한다.")
+    @Test
+    void givenArticleId_whenDeletingArticle_thenDeletesArticle() {
+        // Given
+        willDoNothing().given(articleRepository).delete(any(Article.class));
+
+        // When
+        sut.deleteArticle(1L);
+
+        // Then
+        then(articleRepository).should().delete(any(Article.class));
+    }
+
+}