如何使用jest在typescript中模拟mongodb管理器

npm install --save-dev jest ts-jest @types/jest mongodb-memory-server

import { MongoClient } from 'mongodb';
import { MongoMemoryServer } from 'mongodb-memory-server';

describe('MongoDB Manager', () => {
  let mongoServer: MongoMemoryServer;
  let mongoClient: MongoClient;
  
  beforeAll(async () => {
    mongoServer = new MongoMemoryServer();
    const mongoUri = await mongoServer.getUri();
    mongoClient = new MongoClient(mongoUri);
    await mongoClient.connect();
  });

  afterAll(async () => {
    await mongoClient.close();
    await mongoServer.stop();
  });

  // 添加测试用例
});

npx jest mongodbManager.test.ts