Add test for moxstubout

Add a test for moxstubout and update all of the python3-related
bits needed so the tests will pass there. Those changes are
based on Julien's work in https://review.openstack.org/#/c/55606

Change-Id: Ie7c41dbfbabfb3bcbd4e181b095aa2cf09345f5c

oslo/test/__init__.py

@@ -0,0 +1,14 @@
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+import six
+six.add_move(six.MovedModule('mox', 'mox', 'mox3.mox'))

oslo/test/moxstubout.py

@@ -16,7 +16,8 @@
 # under the License.
 
 import fixtures
-import mox
+
+from six.moves import mox
 
 
 class MoxStubout(fixtures.Fixture):

requirements-py3.txt

@@ -0,0 +1,4 @@
+fixtures>=0.3.14
+testtools>=0.9.32
+mock>=1.0
+mox3>=0.7.0

requirements.txt

@@ -1,3 +1,4 @@
 fixtures>=0.3.14
 testtools>=0.9.34
 mock>=1.0
+mox>=0.5.3

test-requirements-py3.txt

@@ -0,0 +1,15 @@
+hacking>=0.8.0,<0.9
+
+discover
+python-subunit
+testrepository>=0.0.17
+testscenarios>=0.4
+
+# when we can require tox>= 1.4, this can go into tox.ini:
+#  [testenv:cover]
+#  deps = {[testenv]deps} coverage
+coverage>=3.6
+
+# this is required for the docs build jobs
+sphinx>=1.1.2,<1.2
+oslosphinx

tests/unit/test_moxstubout.py

@@ -0,0 +1,32 @@
+# Copyright 2014 IBM Corp.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+from oslo.test import base
+from oslo.test import moxstubout
+
+
+class TestMoxStubout(base.BaseTestCase):
+
+    def _stubable(self):
+        pass
+
+    def test_basic_stubout(self):
+        f = self.useFixture(moxstubout.MoxStubout())
+        before = TestMoxStubout._stubable
+        f.mox.StubOutWithMock(TestMoxStubout, '_stubable')
+        after = TestMoxStubout._stubable
+        self.assertNotEqual(before, after)
+        f.cleanUp()
+        after2 = TestMoxStubout._stubable
+        self.assertEqual(before, after2)

tox.ini

@@ -8,6 +8,10 @@ deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
 commands = python setup.py testr --slowest --testr-args='{posargs}'
 
+[testenv:py33]
+deps = -r{toxinidir}/requirements-py3.txt
+       -r{toxinidir}/test-requirements-py3.txt
+
 [testenv:pep8]
 commands = flake8
 
@@ -23,3 +27,6 @@ commands = {posargs}
 show-source = True
 exclude = .tox,dist,doc,*.egg,build
 builtins = _
+
+[hacking]
+import_exceptions = six.moves.mox