election/openstack_election/tests/fixtures.py
Tony Breeds 51a07ff74f Add a testing fixture to capture outputs during test runs
And use the new fixture for all Election tests

Change-Id: I3b431f33f5f47db0e755670e4a5ef971dfdc8d04
2018-07-25 16:13:00 +10:00

49 lines
1.7 KiB
Python

# 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 __future__ import absolute_import
from __future__ import print_function
from __future__ import unicode_literals
import fixtures
import os
_TRUE_VALUES = ('True', 'true', '1', 'yes')
class OutputStreamCapture(fixtures.Fixture):
"""Capture output streams during tests.
This fixture captures errant printing to stderr / stdout during
the tests and lets us see those streams at the end of the test
runs instead. Useful to see what was happening during failed
tests.
"""
def setUp(self):
super(OutputStreamCapture, self).setUp()
if os.environ.get('OS_STDOUT_CAPTURE') in _TRUE_VALUES:
self.out = self.useFixture(fixtures.StringStream('stdout'))
self.useFixture(
fixtures.MonkeyPatch('sys.stdout', self.out.stream))
if os.environ.get('OS_STDERR_CAPTURE') in _TRUE_VALUES:
self.err = self.useFixture(fixtures.StringStream('stderr'))
self.useFixture(
fixtures.MonkeyPatch('sys.stderr', self.err.stream))
@property
def stderr(self):
return self.err._details["stderr"].as_text()
@property
def stdout(self):
return self.out._details["stdout"].as_text()