// Start with a webdriver instance:
var sw = require('selenium-webdriver');
var driver = new sw.Builder()
  .withCapabilities(sw.Capabilities.chrome())
  .build()

//optional timeout in ms to use with eventually (defaults to 1000)
var timeout = 15000;
//optional interval in ms to use when polling (defaults to 200)
var interval = 100;

// And then...
var chai = require('chai');
var chaiWebdriver = require('chai-webdriver-promised');
chai.use(chaiWebdriver(driver, timeout, interval));

// And you're good to go!
chai.describe('kitty test', function() {
  chai.before(function(done) {
    driver.get('http://github.com').then(done);
  });
  it('should not find a kitty', function() {
    return chai.expect('#site-container h1.heading').dom.to.not.contain.text("I'm a kitty!");
  });
});