gh.js

var request = require('request')
  , Promise = require('bluebird')
  , getAsync = Promise.promisify(request.get);

module.exports.getProfile = function getProfile(username) {
  return getAsync('https://api.github.com/users/' + username);
}

package.json

{
  "name": "mocking_demo",
  "version": "0.0.0",
  "description": "",
  "main": "gh.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "repository": {
    "type": "git",
    "url": "https://gist.github.com/11359213.git"
  },
  "author": "Bulkan Evcimen <[email protected]>",
  "license": "MIT",
  "bugs": {
    "url": "https://gist.github.com/11359213"
  },
  "homepage": "https://gist.github.com/11359213",
  "dependencies": {
    "bluebird": "^1.2.4",
    "chai": "^1.9.1",
    "sinon": "^1.9.1",
    "request": "^2.34.0",
    "mocha": "^1.18.2"
  }
}