如何在typescript-node项目中配置jest-mongodb(@shelf/jest-mongodb)？

npm install --save-dev jest @shelf/jest-mongodb

module.exports = {
  preset: 'ts-jest',
  testEnvironment: 'node',
  setupFilesAfterEnv: ['./node_modules/@shelf/jest-mongodb/setup.js'],
  transform: {
    '^.+\\.tsx?$': 'ts-jest',
  },
  moduleNameMapper: {
    '^@/(.*)$': '<rootDir>/src/$1',
  },
};

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

let mongoServer: MongoMemoryServer;
let connection: MongoClient;

beforeAll(async () => {
  mongoServer = new MongoMemoryServer();
  const mongoUri = await mongoServer.getUri();
  connection = await MongoClient.connect(mongoUri, {
    useNewUrlParser: true,
    useUnifiedTopology: true,
  });
});

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

test('example test', async () => {
  // 在这里编写测试代码，可以使用connection来访问临时的MongoDB服务器
});