socket.io/test/support/server.js

// this is a test server to support tests which make requests

var express = require('express');
var app = express();
var join = require('path').join;
var http = require('http').Server(app);
var server = require('engine.io').attach(http, {'pingInterval': 500});
var webpack = require('webpack');
var webpackMiddleWare = require('webpack-dev-middleware');

http.listen(process.env.ZUUL_PORT || 3000);

// server worker.js as raw file
app.use('/test/support', express.static(join(__dirname, 'public')));

// server engine.io.js via webpack
app.get('/test/support/engine.io.js',
        webpackMiddleWare(
          webpack(require('../../support/webpack.config.js')),
          {
            filename: 'engine.io.js',
            publicPath: './'
          }));

server.on('connection', function(socket){
  socket.send('hi');

  // Bounce any received messages back
  socket.on('message', function (data) {
    if (data === 'give binary') {
      var abv = new Int8Array(5);
      for (var i = 0; i < 5; i++) {
        abv[i] = i;
      }
      socket.send(abv);
      return;
    }

    socket.send(data);
  });
});