modify: post repo 에서 query order 추가 및 post repo 계층 테스트 코드 작성 완

Author: Nuung

src/__test__/sum.test.ts

@@ -0,0 +1,145 @@
+import { Pool, QueryResult } from 'pg';
+import { PostRepository } from '@/repositories/post.repository';
+import { DBError } from '@/exception';
+
+jest.mock('pg');
+
+const mockPool: {
+  query: jest.Mock<Promise<QueryResult<Record<string, unknown>>>, unknown[]>;
+} = {
+  query: jest.fn(),
+};
+
+describe('PostRepository', () => {
+  let repo: PostRepository;
+
+  beforeEach(() => {
+    repo = new PostRepository(mockPool as unknown as Pool);
+  });
+
+  describe('findPostsByUserId', () => {
+    it('사용자의 게시글과 nextCursor를 반환해야 한다', async () => {
+      const mockPosts = [
+        { id: 1, post_released_at: '2025-03-01T00:00:00Z', daily_view_count: 10, daily_like_count: 5 },
+        { id: 2, post_released_at: '2025-03-02T00:00:00Z', daily_view_count: 20, daily_like_count: 15 },
+      ];
+
+      mockPool.query.mockResolvedValue({
+        rows: mockPosts,
+        rowCount: mockPosts.length,
+        command: '',
+        oid: 0,
+        fields: [],
+      } as QueryResult);
+
+      const result = await repo.findPostsByUserId(1, undefined, 'released_at', false);
+
+      expect(result.posts).toEqual(mockPosts);
+      expect(result).toHaveProperty('nextCursor');
+    });
+
+    it('정렬 순서를 보장해야 한다', async () => {
+      const mockPosts = [
+        { id: 2, post_released_at: '2025-03-02T00:00:00Z', daily_view_count: 20, daily_like_count: 15 },
+        { id: 1, post_released_at: '2025-03-01T00:00:00Z', daily_view_count: 10, daily_like_count: 5 },
+      ];
+
+      mockPool.query.mockResolvedValue({
+        rows: mockPosts,
+        rowCount: mockPosts.length,
+        command: '',
+        oid: 0,
+        fields: [],
+      } as QueryResult);
+
+      const result = await repo.findPostsByUserId(1, undefined, 'released_at', false);
+      expect(result.posts).toEqual(mockPosts);
+      expect(result.posts[0].id).toBeGreaterThan(result.posts[1].id);
+    });
+  });
+
+  describe('getTotalPostCounts', () => {
+    it('사용자의 총 게시글 수를 반환해야 한다', async () => {
+      mockPool.query.mockResolvedValue({
+        rows: [{ count: '10' }],
+        rowCount: 1,
+        command: '',
+        oid: 0,
+        fields: [],
+      } as QueryResult);
+
+      const count = await repo.getTotalPostCounts(1);
+      expect(count).toBe(10);
+    });
+  });
+
+  describe('에러 발생 시 처리', () => {
+    it('쿼리 실행 중 에러가 발생하면 DBError를 던져야 한다', async () => {
+      mockPool.query.mockRejectedValue(new Error('DB connection failed'));
+
+      await expect(repo.findPostsByUserId(1)).rejects.toThrow(DBError);
+      await expect(repo.getTotalPostCounts(1)).rejects.toThrow(DBError);
+    });
+  });
+
+  describe('getYesterdayAndTodayViewLikeStats', () => {
+    it('어제와 오늘의 조회수 및 좋아요 수를 반환해야 한다', async () => {
+      const mockStats = {
+        daily_view_count: 20,
+        daily_like_count: 15,
+        yesterday_views: 10,
+        yesterday_likes: 8,
+        last_updated_date: '2025-03-08T00:00:00Z',
+      };
+
+      mockPool.query.mockResolvedValue({
+        rows: [mockStats],
+        rowCount: 1,
+        command: '',
+        oid: 0,
+        fields: [],
+      } as QueryResult);
+
+      const result = await repo.getYesterdayAndTodayViewLikeStats(1);
+      expect(result).toEqual(mockStats);
+    });
+  });
+
+  describe('findPostByPostId', () => {
+    it('특정 post ID에 대한 통계를 반환해야 한다', async () => {
+      const mockStats = [
+        { date: '2025-03-08T00:00:00Z', daily_view_count: 50, daily_like_count: 30 },
+      ];
+
+      mockPool.query.mockResolvedValue({
+        rows: mockStats,
+        rowCount: mockStats.length,
+        command: '',
+        oid: 0,
+        fields: [],
+      } as QueryResult);
+
+      const result = await repo.findPostByPostId(1);
+      expect(result).toEqual(mockStats);
+    });
+  });
+
+  describe('findPostByPostUUID', () => {
+    it('특정 post UUID에 대한 통계를 반환해야 한다', async () => {
+      const mockStats = [
+        { date: '2025-03-08T00:00:00Z', daily_view_count: 50, daily_like_count: 30 },
+      ];
+
+      mockPool.query.mockResolvedValue({
+        rows: mockStats,
+        rowCount: mockStats.length,
+        command: '',
+        oid: 0,
+        fields: [],
+      } as QueryResult);
+
+      const result = await repo.findPostByPostUUID('uuid-1234', '2025-03-01', '2025-03-08');
+      expect(result).toEqual(mockStats);
+    });
+  });
+});

src/repositories/__test__/post.repository.test.ts

@@ -169,6 +169,7 @@ export class PostRepository {
         pds.daily_like_count
       FROM posts_postdailystatistics pds
       WHERE pds.post_id = $1
+      ORDER BY pds.date ASC
       `;
 
       const values: (number | string)[] = [postId];