cypress/packages/runner/lib/test-setup.js

'use strict'

var chai = require('chai')
var jsdom = require('jsdom').jsdom
var sinonChai = require('sinon-chai')

var exposedProperties = ['window', 'navigator', 'document']

// http://airbnb.io/enzyme/docs/guides/jsdom.html
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'
}

// enzyme, and therefore chai-enzyme, needs to be required after
// global.navigator is set up (https://github.com/airbnb/enzyme/issues/395)
var chaiEnzyme = require('chai-enzyme')

chai.use(chaiEnzyme())
chai.use(sinonChai)
global.expect = chai.expect

class Runnable {
  emit () {}
}

class Runner {
  emit () {}
  uncaught () {}
}

global.Mocha = { Runnable, Runner }
global.$Cypress = { create: () => {} }
global.io = { connect: () => { return { emit: () => {}, on: () => {} } } }