const chai = require('chai'); const sinon = require('sinon'); const sinonChai = require('sinon-chai'); const jsdom = require('jsdom').jsdom; global.expect = chai.expect; global.sinon = sinon; chai.use(sinonChai); // Set up JS DOM const exposedProperties = ['window', 'navigator', 'document']; global.document = jsdom( '', ); global.window = document.defaultView; Object.keys(document.defaultView).forEach(property => { if (typeof global[property] === 'undefined') { exposedProperties.push(property); global[property] = document.defaultView[property]; } }); global.navigator = { userAgent: 'node.js', }; documentRef = document;