GH-177 test cooking

gistfile1.js

require('./common');
var http = require('http');

var server = http.createServer();
server.listen();

var engine = eio.attach(server, {
	allowUpgrades: true,
	transports: ['polling', 'websocket'],
	pingInterval:4000,
	pingTimeout: 8000
});
// disable websocket support
server.removeAllListeners('upgrade');

var port = server.address().port;
engine.on('connection', function (conn) {
	setTimeout(function() {
		conn.send('success');
	}, 1000);
});

var socket = new eioc.Socket('ws://localhost:%d'.s(port));
socket.on('error', function(e) {
	// fails before the fix
	if (e.description) expect(e.description).to.not.be(400);
});
socket.on('open', function () {
	// make sure we get the message after the fix
	socket.on('message', function (msg) {
		expect(msg).to.be('success');
		done();
	});
	// squid, or nginx proxies remove Upgrade: websocket, Connection: Upgrade headers,
	// transforming the ws request into http GET request.
	// this emulates that bad behavior
	var fakeProxyUrl = 'http://localhost:%d/engine.io/?EIO=2&transport=websocket&sid=%s'
		.s(port, socket.id);
	http.get(fakeProxyUrl);
});

This can be run in engine.io/test dir

Even if no race exists, be fair and listen messages before the fake GET.