Feature/#38 가격 하락률 기준 주식 리스트 조회 기능 구현 (#177)

boostcampwm-2024 · Nov 18, 2024 · 0d77901 · 0d77901
2 parents bcc9a09 + 6710d43
commit 0d77901
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Showing 3 changed files with 36 additions and 21 deletions.
diff --git a/packages/backend/src/stock/stock.controller.ts b/packages/backend/src/stock/stock.controller.ts
@@ -234,4 +234,10 @@ export class StockController {
   async getTopStocksByGainers(@LimitQuery(20) limit: number) {
     return await this.stockService.getTopStocksByGainers(limit);
   }
+
+  @Get('topLosers')
+  @ApiGetStocks('가격 하락률 기반 주식 리스트 조회 API')
+  async getTopStocksByLosers(@LimitQuery(20) limit: number) {
+    return await this.stockService.getTopStocksByLosers(limit);
+  }
 }
diff --git a/packages/backend/src/stock/stock.service.spec.ts b/packages/backend/src/stock/stock.service.spec.ts
@@ -278,23 +278,15 @@ describe('StockService 테스트', () => {
     expect(result).toBe(false);
   });
 
-  test('주식 조회수 기준 상위 데이터를 반환한다.', async () => {
-    const limit = 5;
+  test('주식 하락률 기준 상위 데이터를 반환한다.', async () => {
+    const limit = 20;
     // QueryBuilder Mock
     const queryBuilderMock = {
       leftJoin: jest.fn().mockReturnThis(),
       select: jest.fn().mockReturnThis(),
       orderBy: jest.fn().mockReturnThis(),
       limit: jest.fn().mockReturnThis(),
       getRawMany: jest.fn().mockResolvedValue([
-        {
-          id: 'A005930',
-          name: '삼성전자',
-          currentPrice: '100000.0',
-          changeRate: '2.5',
-          volume: '500000',
-          marketCap: '500000000000.00',
-        },
         {
           id: 'A051910',
           name: 'LG화학',
@@ -303,6 +295,14 @@ describe('StockService 테스트', () => {
           volume: '300000',
           marketCap: '20000000000.00',
         },
+        {
+          id: 'A005930',
+          name: '삼성전자',
+          currentPrice: '100000.0',
+          changeRate: '2.5',
+          volume: '500000',
+          marketCap: '500000000000.00',
+        },
       ]),
     };
 
@@ -315,25 +315,17 @@ describe('StockService 테스트', () => {
     const dataSource = createDataSourceMock(managerMock);
     const stockService = new StockService(dataSource as DataSource, logger);
 
-    const result = await stockService.getTopStocksByViews(limit);
+    const result = await stockService.getTopStocksByLosers(limit);
 
     expect(managerMock.getRepository).toHaveBeenCalledWith(Stock);
     expect(queryBuilderMock.orderBy).toHaveBeenCalledWith(
-      'stock.views',
-      'DESC',
+      'stockLiveData.changeRate',
+      'ASC',
     );
     expect(queryBuilderMock.limit).toHaveBeenCalledWith(limit);
     expect(queryBuilderMock.getRawMany).toHaveBeenCalled();
 
     expect(instanceToPlain(result)).toEqual([
-      {
-        id: 'A005930',
-        name: '삼성전자',
-        currentPrice: 100000.0,
-        changeRate: 2.5,
-        volume: 500000,
-        marketCap: '500000000000.00',
-      },
       {
         id: 'A051910',
         name: 'LG화학',
@@ -342,6 +334,14 @@ describe('StockService 테스트', () => {
         volume: 300000,
         marketCap: '20000000000.00',
       },
+      {
+        id: 'A005930',
+        name: '삼성전자',
+        currentPrice: 100000.0,
+        changeRate: 2.5,
+        volume: 500000,
+        marketCap: '500000000000.00',
+      },
     ]);
   });
 });
diff --git a/packages/backend/src/stock/stock.service.ts b/packages/backend/src/stock/stock.service.ts
@@ -154,4 +154,13 @@ export class StockService {
 
     return plainToInstance(StocksResponse, rawData);
   }
+
+  async getTopStocksByLosers(limit: number) {
+    const rawData = await this.StocksQuery()
+      .orderBy('stockLiveData.changeRate', 'ASC')
+      .limit(limit)
+      .getRawMany();
+
+    return plainToInstance(StocksResponse, rawData);
+  }
 }