Ember async test helper for use with content editable

setElementHtml.js

export default Ember.Test.registerAsyncHelper('setElementHTML', function(app, selector, value) {
     return new Ember.Test.promise(function(resolve) {
         Ember.Test.adapter.asyncStart();
 
         Ember.$(selector).html(value);
         Ember.run.later(() => resolve(), 100);
 
         Ember.Test.adapter.asyncEnd();
     });
 });