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# fixtures: Fixtures with cleanups for testing and convenience.
#
# Copyright (c) 2010, Robert Collins <robertc@robertcollins.net>
#
# 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__ = [
'TestWithFixtures',
]
import unittest
from fixtures.fixture import gather_details
class TestWithFixtures(unittest.TestCase):
"""A TestCase with a helper function to use fixtures.
Normally used as a mix-in class to add useFixture.
Note that test classes such as testtools.TestCase which already have a
``useFixture`` method do not need this mixed in.
"""
def useFixture(self, fixture):
"""Use fixture in a test case.
The fixture will be setUp, and self.addCleanup(fixture.cleanUp) called.
:param fixture: The fixture to use.
:return: The fixture, after setting it up and scheduling a cleanup for
it.
"""
use_details = (
gather_details is not None and
getattr(self, "addDetail", None) is not None)
try:
fixture.setUp()
except:
if use_details:
# Capture the details now, in case the fixture goes away.
gather_details(fixture.getDetails(), self.getDetails())
raise
else:
self.addCleanup(fixture.cleanUp)
if use_details:
# Capture the details from the fixture during test teardown;
# this will evaluate the details before tearing down the
# fixture.
self.addCleanup(gather_details, fixture, self)
return fixture
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