emberjs/ember.js — pull request #5252 by bantic (2014-07-27 21:08:51+00:00)
Title: Add test for more than two nested async helpers

In ember prior to commit 633cf453, if an acceptance test has more
than 2 async test helpers in an `andThen`, those later test helpers will
not fire in the proper order.

This bug is reported in #5251.

This test serves as a regression protection for the bug.