promise.js

promise = new Promise(funciton(resolve, reject) {
  setTimeout(function() {
    // good practice to run-loop here, but not totally required. Just for extra perf/consistency
    Ember.run(null, resolve, 'fullfillment value');
  })
})

// this queues a task to flush later, so it requires the run-loop
// in testing on master ember (Ember.testing = true) we just do it for you
promise.then(function() {

})