package.json

{
  "scripts": {
    "start": "node server/index.js",
    "test": "mocha test --require test/setup.js --compilers js:babel-register",
  }
}

setup.js

import jsdom from 'jsdom';


global.document = jsdom.jsdom('');
global.window = document.defaultView;
global.alert = () => {};
global.navigator = window.navigator;