py27 jobs failing due to mock_open after mock 1.1.4 released

[Sylvain Bauza]

2015-07-17 12:11:00.987 | ==============================
2015-07-17 12:11:00.987 | Failed 2 tests - output below:
2015-07-17 12:11:00.987 | ==============================
2015-07-17 12:11:00.987 |
2015-07-17 12:11:00.988 | nova.tests.unit.virt.hyperv.test_vhdutils.VHDUtilsTestCase.test_get_vhd_format_zero_length_file
2015-07-17 12:11:00.988 | -----------------------------------------------------------------------------------------------
2015-07-17 12:11:00.988 |
2015-07-17 12:11:00.988 | Captured traceback:
2015-07-17 12:11:00.988 | ~~~~~~~~~~~~~~~~~~~
2015-07-17 12:11:00.988 | Traceback (most recent call last):
2015-07-17 12:11:00.988 | File "nova/tests/unit/virt/hyperv/test_vhdutils.py", line 279, in test_get_vhd_format_zero_length_file
2015-07-17 12:11:00.988 | f.seek.assert_called_once_with(0, 2)
2015-07-17 12:11:00.988 | File "/home/jenkins/workspace/gate-nova-python27/.tox/py27/local/lib/python2.7/site-packages/mock/mock.py", line 947, in assert_called_once_with
2015-07-17 12:11:00.988 | raise AssertionError(msg)
2015-07-17 12:11:00.988 | AssertionError: Expected 'seek' to be called once. Called 0 times.
2015-07-17 12:11:00.989 |
2015-07-17 12:11:00.989 |
2015-07-17 12:11:00.989 | nova.tests.unit.virt.hyperv.test_vmops.VMOpsTestCase.test_get_console_output
2015-07-17 12:11:00.989 | ----------------------------------------------------------------------------
2015-07-17 12:11:00.989 |
2015-07-17 12:11:00.989 | Captured traceback:
2015-07-17 12:11:00.989 | ~~~~~~~~~~~~~~~~~~~
2015-07-17 12:11:00.989 | Traceback (most recent call last):
2015-07-17 12:11:00.989 | File "/home/jenkins/workspace/gate-nova-python27/.tox/py27/local/lib/python2.7/site-packages/mock/mock.py", line 1305, in patched
2015-07-17 12:11:00.989 | return func(*args, **keywargs)
2015-07-17 12:11:00.989 | File "nova/tests/unit/virt/hyperv/test_vmops.py", line 981, in test_get_console_output
2015-07-17 12:11:00.989 | self.assertEqual(self.FAKE_LOG * 2, instance_log)
2015-07-17 12:11:00.990 | File "/home/jenkins/workspace/gate-nova-python27/.tox/py27/local/lib/python2.7/site-packages/testtools/testcase.py", line 350, in assertEqual
2015-07-17 12:11:00.990 | self.assertThat(observed, matcher, message)
2015-07-17 12:11:00.990 | File "/home/jenkins/workspace/gate-nova-python27/.tox/py27/local/lib/python2.7/site-packages/testtools/testcase.py", line 435, in assertThat
2015-07-17 12:11:00.990 | raise mismatch_error
2015-07-17 12:11:00.990 | testtools.matchers._impl.MismatchError: 'fake_logfake_log' != 'fake_logfake_logfake_logfake_log'

http://logs.openstack.org/57/186757/13/check/gate-nova-python27/c75a463/console.html#_2015-07-17_12_11_00_988

Logstash is having 12 hours backlog now, unable to get a pattern.

[Matt Riedemann (mriedem)]

https://github.com/testing-cabal/mock/commit/e9db0161fc11eceba189a0cc161deefce57529a8 looks related.

[Matt Riedemann (mriedem)]

The upstream bug: https://github.com/testing-cabal/mock/issues/288

[Matt Riedemann (mriedem)]

g-r cap: https://review.openstack.org/#/c/203043/

[Matt Riedemann (mriedem)]

The g-r change merged and we have the sync in nova but it's still failng:

https://review.openstack.org/#/c/200708/

Something else is pulling in mock 1.1.4.

[Matt Riedemann (mriedem)]

mock 1.2 is out now with a revert of the original problem:

https://github.com/rbtcollins/mock/commit/31d3922237ae51bba54c891970c3a638feb36768