package.json

{
  "dependencies": {
    "webdrivercss": "^1.1.3",
    "webdriverio": "^2.4.5"
  }
}

test.js

var webdriverio = require('webdriverio'),
    assert      = require('assert');

describe('Missing elements tests', function(){

    this.timeout(99999999);
    var client = {};

    before(function(done){
      client = webdriverio.remote({ desiredCapabilities: {browserName: 'phantomjs'} });
      client.init(done);
    });

    after(function(done) {
      client.end(done);
    });

    it('Should show all the elements on the page',function(done) {
      client
        .url('http://dev-moment.pantheon.io')
        .windowHandleSize({width: 1024, height: 768})
        .pause(5000)
        .saveScreenshot('./snapshot.png')
        .call(done);
    });
});