Use fixtures instead of deprecated mockpatch module

The mockpatch module of oslotest is deprecated since version 1.13
and may be removed in version 2.0. Use fixtures.Mock* classes instead.

Change-Id: I0ea834d41664efe84aa28ef2362467e2ad8b1928

# Copyright (c) 2014 Mirantis.
#
# 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 fixtures
from oslotest import base


class TestCase(base.BaseTestCase):
    """Test case base class for all unit tests."""

    def patch(self, obj, attr):
        """Returns a Mocked object on the patched attribute."""
        mockfixture = self.useFixture(fixtures.MockPatchObject(obj, attr))
        return mockfixture.mock


# Copyright (c) 2014 Mirantis.
#
# 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 oslotest import base
from oslotest import mockpatch


class TestCase(base.BaseTestCase):
    """Test case base class for all unit tests."""

    def patch(self, obj, attr):
        """Returns a Mocked object on the patched attribute."""
        mockfixture = self.useFixture(mockpatch.PatchObject(obj, attr))
        return mockfixture.mock
