http://www.terlici.com/2014/09/15/node-testing.html
http://www.redotheweb.com/2013/01/15/functional-testing-for-nodejs-using-mocha-and-zombie-js.html
http://alanhollis.com/node-js-testing-a-node-js-api-with-mocha-async-and-should/
http://dailyjs.com/2012/02/23/chai/
http://chaijs.com/api/assert/
http://chaijs.com/api/bdd/