
Following OpenStack Style Guidelines: [1] http://docs.openstack.org/developer/hacking/#unit-tests-and-assertraises [H203] Unit test assertions tend to give better messages for more specific assertions. As a result, assertIsNone(...) is preferred over assertEqual(None, ...) and assertIs(..., None) Change-Id: If4db8872c4f5705c1fff017c4891626e9ce4d1e4