Using babel, jsdom and sinonChai with intellij/gulp

setupMocha.js

// Used to run mocha tests within intellij. Provide "--require setupMocha" to mocha to use this
require("babel/register");
var chai = require("chai");
var sinonChai = require("sinon-chai");
var jsdom = require("jsdom").jsdom;

global.document = jsdom("");
global.window = document.defaultView;
Object.keys(document.defaultView).forEach((property) => {
    if (typeof global[property] === "undefined") {
        global[property] = document.defaultView[property];
    }
});
global.navigator = {
    userAgent: "node.js"
};

chai.use(sinonChai);