Test#registerWaiter()

This allows ember-testing to play nicely with other asynchronous events, such as an application that is waiting for a CSS3 transition or an IndexDB transaction.

For example:

Ember.Test.registerWaiter(function() {
  return myPendingTransactions() == 0;
});

The context argument allows you to optionally specify the this with which your callback will be invoked.

For example:

Ember.Test.registerWaiter(MyDB, MyDB.hasPendingTransactions);