Revert "Switch to unittest.mock from mock"

This reverts commit ffdf6f1.

Switching oslotest to unittest.mock has broken a bunch of other
projects because they were (incorrectly) relying on oslotest to
pull in third-party mock for them. Until we get everyone migrated,
let's hold off on doing this for oslotest.

Change-Id: I0bdca39686f3653a56f9e4a554662727e2dbaafd

lower-constraints.txt

@@ -15,6 +15,7 @@ keystoneauth1==3.4.0
 linecache2==1.0.0
 MarkupSafe==1.0
 mccabe==0.2.1
+mock==2.0.0
 netaddr==0.7.18
 openstackdocstheme==1.18.1
 oslo.config==5.2.0

oslotest/base.py

@@ -16,14 +16,14 @@
 """Common utilities used in testing"""
 
 import logging
-from unittest import mock
 
 import fixtures
 from oslotest import createfile
 from oslotest import log
 from oslotest import output
 from oslotest import timeout
 
+from six.moves import mock
 import testtools
 
 LOG = logging.getLogger(__name__)

oslotest/mock_fixture.py

@@ -15,9 +15,9 @@
 #    under the License.
 
 import functools
-from unittest import mock
 
 import fixtures
+import mock
 
 
 def _lazy_autospec_method(mocked_method, original_method, eat_self):
@@ -72,10 +72,8 @@ def __getattr__(self, name):
         original_attr = getattr(original_spec, name)
         if callable(original_attr):
             # lazily autospec callable attribute.
-            eat_self = mock._must_skip(
-                original_spec, name,
-                isinstance(original_spec, type)
-            )
+            eat_self = mock.mock._must_skip(original_spec, name,
+                                            isinstance(original_spec, type))
 
             _lazy_autospec_method(attr, original_attr, eat_self)
 
@@ -112,17 +110,15 @@ def setUp(self):
         super(MockAutospecFixture, self).setUp()
 
         # patch both external and internal usage of Mock / MagicMock.
-        self.useFixture(
-            fixtures.MonkeyPatch(
-                'unittest.mock.Mock',
-                _AutospecMock))
-        self.useFixture(
-            fixtures.MonkeyPatch(
-                'unittest.mock.MagicMock',
-                _AutospecMagicMock))
+        self.useFixture(fixtures.MonkeyPatch('mock.Mock', _AutospecMock))
+        self.useFixture(fixtures.MonkeyPatch('mock.mock.Mock', _AutospecMock))
+        self.useFixture(fixtures.MonkeyPatch('mock.MagicMock',
+                                             _AutospecMagicMock))
+        self.useFixture(fixtures.MonkeyPatch('mock.mock.MagicMock',
+                                             _AutospecMagicMock))
 
 
-class _patch(mock._patch):
+class _patch(mock.mock._patch):
     """Patch class with working autospec functionality.
 
     Currently, mock.patch functionality doesn't handle the autospec parameter
@@ -163,11 +159,8 @@ def __enter__(self):
         if autospec:
             target = self.getter()
             original_attr = getattr(target, self.attribute)
-            eat_self = mock._must_skip(
-                target,
-                self.attribute,
-                isinstance(target, type)
-            )
+            eat_self = mock.mock._must_skip(target, self.attribute,
+                                            isinstance(target, type))
 
             new = super(_patch, self).__enter__()
 
@@ -193,11 +186,11 @@ def wrapper(*args, **kwargs):
 
 def patch_mock_module():
     """Replaces the mock.patch class."""
-    mock._patch = _patch
+    mock.mock._patch = _patch
 
     # NOTE(claudiub): mock cannot autospec partial functions properly,
     # especially those created by LazyLoader objects (scheduler client),
     # as it will try to copy the partial function's __name__ (which they do
     # not have).
-    mock._copy_func_details = _safe_attribute_error_wrapper(
-        mock._copy_func_details)
+    mock.mock._copy_func_details = _safe_attribute_error_wrapper(
+        mock.mock._copy_func_details)

oslotest/tests/unit/test_base.py

@@ -17,10 +17,10 @@
 import logging
 import os
 import unittest
-from unittest import mock
 
 import fixtures
 import six
+from six.moves import mock
 import testtools
 
 from oslotest import base

oslotest/tests/unit/test_log.py

@@ -15,8 +15,8 @@
 #    under the License.
 
 import logging
-from unittest import mock
 
+from six.moves import mock
 import testtools
 
 from oslotest import log

oslotest/tests/unit/test_mock_fixture.py

@@ -13,8 +13,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+import mock
 import testtools
-from unittest import mock
 
 from oslotest import mock_fixture
 

oslotest/tests/unit/test_output.py

@@ -13,12 +13,12 @@
 #    under the License.
 
 import sys
-from unittest import mock
-
-import testtools
 
 from oslotest import output
 
+from six.moves import mock
+import testtools
+
 
 class CaptureOutputTest(testtools.TestCase):
 

oslotest/tests/unit/test_timeout.py

@@ -12,8 +12,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from unittest import mock
-
+from six.moves import mock
 import testtools
 
 from oslotest import timeout

requirements.txt

@@ -6,3 +6,4 @@ fixtures>=3.0.0 # Apache-2.0/BSD
 python-subunit>=1.0.0 # Apache-2.0/BSD
 six>=1.10.0 # MIT
 testtools>=2.2.0 # MIT
+mock>=2.0.0 # BSD