An example async test helper to use while integration testing addings tags with a Select2 component in an ember application.

adding-autocomplete-token-test.js

import Ember from 'ember';
import startApp from '../helpers/start-app';
import '../helpers/complete-group-form-part-two';

var App;

module('Acceptance: AddingAutocompleteToken', {
  setup: function() {
    App = startApp();
  },
  teardown: function() {
    Ember.run(App, 'destroy');
  }
});

test('can create new token', function() {
  expect(1);
    
    visit('/autocomplete-form');
    
    autocompleteToken('Happy');
    autocompleteToken('Joy');

    andThen(function() {
      equal(find('.select2-search-choice').length, 2);
    });
});

autocomplete-token.js

import Ember from 'ember';

// register custom helper
Ember.Test.registerAsyncHelper('autocompleteToken', function(app, tag) {

  if (!tag) { tag = 'Test Tag'; }

  triggerEvent('input.select2-input', 'keydown');
  fillIn('input.select2-input', tag);
  triggerEvent('input.select2-input', 'keyup');
  triggerEvent('li.select2-result-selectable:first', 'mousedown');
  triggerEvent('li.select2-result-selectable:first', 'mouseup');

  return wait();
});