emberjs/ember.js — pull request #2343 by stefanpenner (2013-03-24 21:30:30+00:00)
Title: Ember.Application instances are now Deferreds. 

```javascript
app = Ember.Application.create()
app.then(function(){
// will fire when the appDidBoot
// very similar to #ready
});
```

can be used to prevent test runs
before the app is ready.

```javascript
before(function(done){
app.then(done);
});
```