如何执行涉及redis、socket.io和nodejs/express的单元测试？

npm install redis socket.io express mocha chai sinon supertest --save-dev

const chai = require('chai');
const sinon = require('sinon');
const supertest = require('supertest');
const redis = require('redis');
const io = require('socket.io-client');
const app = require('../app');

const expect = chai.expect;
const client = redis.createClient();
const socketURL = 'http://localhost:3000';

describe('Unit Tests', () => {
  let server;
  let socket;

  before((done) => {
    server = app.listen(3000, () => {
      socket = io.connect(socketURL);
      done();
    });
  });

  after((done) => {
    server.close();
    socket.disconnect();
    done();
  });

  beforeEach((done) => {
    // 清空Redis数据库或进行其他必要的准备工作
    client.flushdb();
    done();
  });

  it('should perform a unit test', (done) => {
    // 编写测试逻辑，使用chai、sinon和supertest进行断言和模拟请求
    // 示例：测试一个API接口
    supertest(server)
      .get('/api/data')
      .expect(200)
      .end((err, res) => {
        if (err) return done(err);
        expect(res.body).to.be.an('object');
        expect(res.body).to.have.property('data');
        done();
      });
  });
});

npm test