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# Copyright (c) 2018 Intel Corporation
#
# 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 abc
import six

from oslo_config import cfg
from oslotest import base


CONF = cfg.CONF


@six.add_metaclass(abc.ABCMeta)
class BaseFunctionalTestCase(base.BaseTestCase):
    """Base class for functional tests."""

    def setUp(self):
        super(BaseFunctionalTestCase, self).setUp()

    def config(self, **kw):
        """Override some configuration values.

        The keyword arguments are the names of configuration options to
        override and their values.

        If a group argument is supplied, the overrides are applied to
        the specified configuration option group.

        All overrides are automatically cleared at the end of the current
        test by the fixtures cleanup process.
        """
        group = kw.pop('group', None)
        for k, v in kw.items():
            CONF.set_override(k, v, group)