old_contents: 
  var expect = require('expect.js');
  var eio = require('../');
  
  describe('engine.io-client', function () {
    var open;
  
    before(function() {
      open = eio.prototype.open;
      // override Socket#open to not connect
      eio.prototype.open = function() {};
    });
  
    after(function() {
      eio.prototype.open = open;
    });
  
    it('should expose protocol number', function () {
      expect(eio.protocol).to.be.a('number');
    });
  
    it('should properly parse http uri without port', function() {
      var client = eio('http://localhost');
      expect(client.port).to.be('80');
    });
  
    it('should properly parse https uri without port', function() {
      var client = eio('https://localhost');
      expect(client.hostname).to.be('localhost');
      expect(client.port).to.be('443');
    });
  
    it('should properly parse wss uri without port', function() {
      var client = eio('wss://localhost');
      expect(client.hostname).to.be('localhost');
      expect(client.port).to.be('443');
    });
  
    it('should properly parse wss uri with port', function() {
      var client = eio('wss://localhost:2020');
      expect(client.hostname).to.be('localhost');
      expect(client.port).to.be('2020');
    });
  
    it('should properly parse a host without port', function() {
      var client = eio({ host: 'localhost' });
      expect(client.hostname).to.be('localhost');
      expect(client.port).to.be('80');
    });
  
    it('should properly parse a host with port', function() {
      var client = eio({ host: 'localhost', port: '8080' });
      expect(client.hostname).to.be('localhost');
      expect(client.port).to.be('8080');
    });
  
    it('should properly parse an IPv6 uri without port', function() {
      var client = eio('http://[::1]');
      expect(client.hostname).to.be('::1');
      expect(client.port).to.be('80');
    });
  
    it('should properly parse an IPv6 uri with port', function() {
      var client = eio('http://[::1]:8080');
      expect(client.hostname).to.be('::1');
      expect(client.port).to.be('8080');
    });
  
    it('should properly parse an IPv6 host without port (1/2)', function() {
      var client = eio({ host: '[::1]' });
      expect(client.hostname).to.be('::1');
      expect(client.port).to.be('80');
    });
  
    it('should properly parse an IPv6 host without port (2/2)', function() {
      var client = eio({ secure: true, host: '[::1]' });
      expect(client.hostname).to.be('::1');
      expect(client.port).to.be('443');
    });
  
    it('should properly parse an IPv6 host with port', function() {
      var client = eio({ host: '[::1]', port: '8080' });
      expect(client.hostname).to.be('::1');
      expect(client.port).to.be('8080');
    });
  
  });
  
new_contents: 
  var expect = require('expect.js');
  var eio = require('../');
  
  describe('engine.io-client', function () {
    var open;
  
    before(function() {
      open = eio.prototype.open;
      // override Socket#open to not connect
      eio.prototype.open = function() {};
    });
  
    after(function() {
      eio.prototype.open = open;
    });
  
    it('should expose protocol number', function () {
      expect(eio.protocol).to.be.a('number');
    });
  
    it('should properly parse http uri without port', function() {
      var client = eio('http://localhost');
      expect(client.port).to.be('80');
    });
  
    it('should properly parse https uri without port', function() {
      var client = eio('https://localhost');
      expect(client.hostname).to.be('localhost');
      expect(client.port).to.be('443');
    });
  
    it('should properly parse wss uri without port', function() {
      var client = eio('wss://localhost');
      expect(client.hostname).to.be('localhost');
      expect(client.port).to.be('443');
    });
  
    it('should properly parse wss uri with port', function() {
      var client = eio('wss://localhost:2020');
      expect(client.hostname).to.be('localhost');
      expect(client.port).to.be('2020');
    });
  
    it('should properly parse a host without port', function() {
      var client = eio({ host: 'localhost' });
      expect(client.hostname).to.be('localhost');
      expect(client.port).to.be('80');
    });
  
    it('should properly parse a host with port', function() {
      var client = eio({ host: 'localhost', port: '8080' });
      expect(client.hostname).to.be('localhost');
      expect(client.port).to.be('8080');
    });
  
    it('should properly parse an IPv6 uri without port', function() {
      var client = eio('http://[::1]');
      expect(client.hostname).to.be('::1');
      expect(client.port).to.be('80');
    });
  
    it('should properly parse an IPv6 uri with port', function() {
      var client = eio('http://[::1]:8080');
      expect(client.hostname).to.be('::1');
      expect(client.port).to.be('8080');
    });
  
    it('should properly parse an IPv6 host without port (1/2)', function() {
      var client = eio({ host: '[::1]' });
      expect(client.hostname).to.be('::1');
      expect(client.port).to.be('80');
    });
  
    it('should properly parse an IPv6 host without port (2/2)', function() {
      var client = eio({ secure: true, host: '[::1]' });
      expect(client.hostname).to.be('::1');
      expect(client.port).to.be('443');
    });
  
    it('should properly parse an IPv6 host with port', function() {
      var client = eio({ host: '[::1]', port: '8080' });
      expect(client.hostname).to.be('::1');
      expect(client.port).to.be('8080');
    });
  
    it('should properly parse an IPv6 host without brace', function() {
      var client = eio({ host: '::1' });
      expect(client.hostname).to.be('::1');
      expect(client.port).to.be('80');
    });
  });
  
subject: add a test