Test JavaScript code with jsdom and express (using node.js)

gistfile1.js

var jsdom = require("jsdom").jsdom;
var document = jsdom();
var window = document.parentWindow;

var express = require('express');
var app = express();

app.get('/', function(request, response) {
  var code = request.params.code || request.query.code;

  var func = new Function('window', code);
  response.json({
    result: func.call(window, window)
  });
});

app.listen(4730);