Node.js 无法在mocha测试中将socket.io-client连接到服务器

尝试将socket.io-client连接到节点服务器时，使用DEBUG时出现以下错误=*

mocha:runner run suite Chat Server Message Events +1ms 
  Message Events
socket.io-client:url parse http://localhost:5000 +1s
socket.io-client ignoring socket cache for http://localhost:5000 +0ms
socket.io-client:manager readyState closed +1ms
socket.io-client:manager opening http://localhost:5000 +2ms
engine.io-client:socket creating transport "websocket" +1ms
engine.io-client:socket setting transport websocket +7ms
socket.io-client:manager connect attempt will timeout after 20000 +1ms
socket.io-client:manager readyState opening +1ms

engine.io-client:socket socket error 
{"description":
  {"code":"ENOENT",
   "errno":"ENOENT",
   "syscall":"connect",
   "target":{"domain":null,
             "_events":{},
             "_maxListeners":10,
             "_socket":null,
             "_ultron":null,
             "_closeReceived":false,
             "bytesReceived":0,
             "readyState":0,
             "supports":{"binary":true},
             "extensions":{},
             "_isServer":false,
             "url":"ws://localhost:5000/socket.io/?EIO=3&transport=websocket",
             "protocolVersion":13,
             "binaryType":"buffer"}}} +2ms

当我在浏览器上使用socket.io-client，使用相同的套接字配置时，不会发生这种情况

以下是测试代码：

var server = require('myServer');
var io = require('socket.io-client');

var url = 'http://localhost:5000';
var options = {
  transports: ['websocket'],
  'force new connection': true
};

var sender;

describe("Server Test", function () {
  it('Should login user', function (done) {
    sender = io(url, options);
  });
});

以下是服务器代码：

var express = require('express');
var app = express();
var server = require('http').Server(app);
var io = require('socket.io')(server);

io.on('connection', function (socket) {
  console.log("connect");
});

server.listen(5000);

服务器工作正常。当scoket.io-client正在从浏览器运行而不是在测试中运行时，它会显示日志消息

---

有人能告诉我为什么会这样吗

因为您正在测试，所以可能在nodejs环境中定义了global.window。而代码行根本不期望它

您应该删除global.window对象或编写类似于

global.WebSocket=require（'ws'）或删除
传输：['websocket']