Node端到端测试：Windows系统下异步beforeEach/afterEach钩子执行失败

这就帮你把这段测试代码和相关说明整理成规范的Markdown格式，方便你查看或分享：

注：以下为尽可能简化的复现代码示例，核心逻辑完整，可在OSX与Linux系统中正常运行

import { expect } from 'chai';
import { MongoClient, Db } from 'mongodb';
import { Application, Request } from 'express';
import { Server } from 'http';
import * as config from 'config';

describe('some test', () => {
  let Session:{ new(app:Application):Request } = require('supertest-session'),
      app:Application, server:Server, mongoClient:MongoClient, db:Db;
  befo...
});

内容的提问来源于stack exchange，提问作者Justin