Backend Testing Guide

后端测试编写指南

测试要求（强制）

职责边界：Backend Agent 是测试的编写者，QA Agent 是测试的验证者。

测试金字塔

单元测试编写

Service 层测试

// services/userService.test.ts
import { UserService } from './userService';
import { UserRepository } from '../repositories/userRepository';

jest.mock('../repositories/userRepository');

describe('UserService', () => {
  let userService: UserService;
  let userRepository: jest.Mocked<UserRepository>;

  beforeEach(() => {
    userRepository = new UserRepository() as jest.Mocked<UserRepository>;
    userService = new UserService(userRepository);
  });

  describe('getById', () => {
    it('returns user when found', async () => {
      const mockUser = { id: '1', name: 'Alice', email: '[email protected]' };
      userRepository.findById.mockResolvedValue(mockUser);

      const result = await userService.getById('1');