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# 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 warnings
import fixtures
from sqlalchemy import exc as sqla_exc
class WarningsFixture(fixtures.Fixture):
"""Filters out warnings during test runs."""
def setUp(self):
super().setUp()
self._original_warning_filters = warnings.filters[:]
# NOTE(stephenfin): Make deprecation warnings only happen once.
# Otherwise this gets kind of crazy given the way that upstream python
# libs use this.
warnings.simplefilter('once', DeprecationWarning)
warnings.filterwarnings(
'error',
category=DeprecationWarning,
module='^keystone\\.',
)
# TODO(stephenfin): This will be fixed once we drop sqlalchemy-migrate
warnings.filterwarnings(
'ignore',
category=DeprecationWarning,
message=r"Using function/method 'db_version\(\)' is deprecated",
)
# TODO(stephenfin): Remove these when we drop support for
# sqlalchemy-migrate
warnings.filterwarnings(
'ignore',
category=sqla_exc.SADeprecationWarning,
module='migrate.versioning',
)
# TODO(stephenfin): We should filter on the specific RemovedIn20Warning
# warnings that affect us, so that we can slowly start addressing them
warnings.simplefilter('error', sqla_exc.SAWarning)
if hasattr(sqla_exc, 'RemovedIn20Warning'):
warnings.simplefilter('ignore', sqla_exc.RemovedIn20Warning)
self.addCleanup(self._reset_warning_filters)
def _reset_warning_filters(self):
warnings.filters[:] = self._original_warning_filters
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