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|
# fixtures: Fixtures with cleanups for testing and convenience.
#
# Licensed under either the Apache License, Version 2.0 or the BSD 3-clause
# license at the users choice. A copy of both licenses are available in the
# project source as Apache-2.0 and BSD. You may not use this file except in
# compliance with one of these two licences.
#
# Unless required by applicable law or agreed to in writing, software
# distributed under these licenses is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# license you chose for the specific language governing permissions and
# limitations under that license.
__all__ = [
'WarningsCapture',
'WarningsFilter',
]
import warnings
import fixtures
class WarningsCapture(fixtures.Fixture):
"""Capture warnings.
While ``WarningsCapture`` is active, warnings will be captured by
the fixture (so that they can be later analyzed).
:attribute captures: A list of warning capture ``WarningMessage`` objects.
"""
def _showwarning(self, *args, **kwargs):
self.captures.append(warnings.WarningMessage(*args, **kwargs))
def _setUp(self):
patch = fixtures.MonkeyPatch("warnings.showwarning", self._showwarning)
self.useFixture(patch)
self.captures = []
class WarningsFilter(fixtures.Fixture):
"""Configure warnings filters.
While ``WarningsFilter`` is active, warnings will be filtered per
configuration.
"""
def __init__(self, filters=None):
"""Create a WarningsFilter fixture.
:param filters: An optional list of dictionaries with arguments
corresponding to the arguments to
:py:func:`warnings.filterwarnings`. For example::
[
{
'action': 'ignore',
'message': 'foo',
'category': DeprecationWarning,
},
]
Order is important: entries closer to the front of the list
override entries later in the list, if both match a particular
warning.
Alternatively, you can configure warnings within the context of the
fixture.
See `the Python documentation`__ for more information.
__: https://docs.python.org/3/library/warnings.html#the-warnings-filter
"""
super().__init__()
self.filters = filters or []
def _setUp(self):
self._original_warning_filters = warnings.filters[:]
for filt in self.filters:
warnings.filterwarnings(**filt)
self.addCleanup(self._reset_warning_filters)
def _reset_warning_filters(self):
warnings.filters[:] = self._original_warning_filters
|
