emberjs/ember.js — pull request #3775 by rjackson (2013-11-20 20:00:13+00:00)
Title: [BUGFIX beta] Fix issue with Ember.Test.unregisterHelper.

* `Ember.Test.unregisterHelper` will currently error if the helper being
removed is found within `originalMethods`. The issue is that
`this.helperContainer` is not available from `Ember.Test` (it is in
`Ember.Application`).
* `orignalMethods` has been moved into a private property of the
`Ember.Application` instance (so that we can properly restore the
original value).
* Added a few tests for the behavior of `registerHelper` and
`unregisterHelper`.