✅ test: 즐겨찾기 등록 API 테스트 코드 작성 #237

BE/src/stock/bookmark/stock-bookmark.service.spec.ts

@@ -0,0 +1,66 @@
+import { Test } from '@nestjs/testing';
+import { BadRequestException } from '@nestjs/common';
+import { StockBookmarkRepository } from './stock-bookmark.repository';
+import { StockDetailService } from '../detail/stock-detail.service';
+import { StockBookmarkService } from './stock-bookmark.service';
+
+describe('stock bookmark test', () => {
+  let stockBookmarkService: StockBookmarkService;
+  let stockBookmarkRepository: StockBookmarkRepository;
+  let stockDetailService: StockDetailService;
+
+  beforeEach(async () => {
+    const mockStockBookmarkRepository = {
+      existsBy: jest.fn(),
+      create: jest.fn(),
+      insert: jest.fn(),
+    };
+    const mockStockDetailService = { getInquirePrice: jest.fn() };
+
+    const module = await Test.createTestingModule({
+      providers: [
+        StockBookmarkService,
+        {
+          provide: StockBookmarkRepository,
+          useValue: mockStockBookmarkRepository,
+        },
+        {
+          provide: StockDetailService,
+          useValue: mockStockDetailService,
+        },
+      ],
+    }).compile();
+
+    stockBookmarkService = module.get(StockBookmarkService);
+    stockBookmarkRepository = module.get(StockBookmarkRepository);
+    stockDetailService = module.get(StockDetailService);
+  });
+
+  it('즐겨찾기에 등록되지 않은 종목에 대해 즐겨찾기 등록할 경우, DB에 즐겨찾기가 추가된다.', async () => {
+    jest.spyOn(stockBookmarkRepository, 'existsBy').mockResolvedValue(false);
+
+    const createMock = jest.fn();
+    jest
+      .spyOn(stockBookmarkRepository, 'create')
+      .mockImplementation(createMock);
+
+    const saveMock = jest.fn();
+    jest.spyOn(stockBookmarkRepository, 'insert').mockImplementation(saveMock);
+
+    await stockBookmarkService.registerBookmark(1, '005930');
+
+    expect(createMock).toHaveBeenCalledWith({
+      user_id: 1,
+      stock_code: '005930',
+    });
+    expect(saveMock).toHaveBeenCalled();
+  });
+
+  it('즐겨찾기에 이미 등록된 종목에 대해 즐겨찾기 등록할 경우, BadRequest 예외가 발생한다.', async () => {
+    jest.spyOn(stockBookmarkRepository, 'existsBy').mockResolvedValue(true);
+
+    await expect(
+      stockBookmarkService.registerBookmark(1, '005930'),
+    ).rejects.toThrow(BadRequestException);
+  });
+});