CasperJS missing flexbox properties workaround

_casper-tweak.scss

/*
	In favor of casper.js (regressive UI testing): a very tiny and hacky fix
	to get around the flexbox issues... Idea is to have this class put on the body
	when we're running phantomjs.

	@NOTE: There is only a class on the body 'body.casper-env' that is allowed to
				 make changes to minimize complexity.

	@NOTE: Only apply the casper-env fix when it's needed in the test env. ofcourse
         we still need (AND SHOULD) test without making any modifcations. This fix
         is purely and ONLY to compensate for missing phantomjs behavior - in no
         way the DOM should differ while testing and I'm aware of this, but there
         is no other way right now available untill phantomjs 2.5 is released which
				 enables all missings goods.

 */

body.casper-env {
  
  // do all the phantomjs compensations
 .some-flexbox-thing {
   display: block;
 }
  
}

casper-tweak.js

/*
  function 'confirmCasperTweaks' - returns if the casper tweak (.casper-env) is
                                   enabled on the current context. For more info
                                   on this 'polyfill', refer to the notes marked
                                   in 'scss/_casper-tweak.scss' for a disclaimer
                                   and usage rules. Invoke only binded to a casper
                                   context. (confirmCasperTweak.apply(casper|this)).

  @description   returns if we enabled our custom CasperJS tweak.
  @return        Boolean
 */
function confirmCasperTweak() {
  return this.evaluate(function() {
    return document.body.classList.contains('casper-env');
  });
}

// start the environment, set the .casper-env class to the body and confirm (with a 'notification' that it's enabled)
casper.start('localhost:8080').thenEvaluate(function() {
  document.body.classList.add('casper-env');
}).then(function() {
  var enabled_tweak = confirmCasperTweak.apply(this);
  if(enabled_tweak) this.echo('Casper tweaking is enabled.');
});

casper.run();