lingyongxu de3df0f2c4 Using assertIsNone() instead of assertEqual(None)
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: I6c43e4618d972c7c8b3925df6532c8b67930fdd7
2017-08-22 10:31:24 +08:00
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