9e7c3e99eb
Add a fixture for controlling whether or not stdout and stderr are captured as the test runs. Blueprint oslotest-refactor-test-base-class Change-Id: Ifa8d991c1a8e3ec643e5350d09fcb3895ac8378e
56 lines
1.9 KiB
Python
56 lines
1.9 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.
|
|
|
|
import os
|
|
|
|
import fixtures
|
|
|
|
_TRUE_VALUES = ('True', 'true', '1', 'yes')
|
|
|
|
|
|
class CaptureOutput(fixtures.Fixture):
|
|
"""Optionally capture the output streams.
|
|
|
|
The behavior is managed through two environment variables. If
|
|
``OS_STDOUT_CAPTURE`` is true then stdout is captured and if
|
|
``OS_STDERR_CAPTURE`` is true then stderr is captured.
|
|
|
|
"True" values include ``True``, ``true``, ``1``, and ``yes``.
|
|
|
|
.. py:attribute:: stdout
|
|
|
|
The ``stream`` attribute from a :class:`StringStream` instance
|
|
replacing stdout.
|
|
|
|
.. py:attribute:: stderr
|
|
|
|
The ``stream`` attribute from a :class:`StringStream` instance
|
|
replacing stderr.
|
|
|
|
"""
|
|
|
|
def __init__(self):
|
|
super(CaptureOutput, self).__init__()
|
|
self.stdout = None
|
|
self.stderr = None
|
|
|
|
def setUp(self):
|
|
super(CaptureOutput, self).setUp()
|
|
if os.environ.get('OS_STDOUT_CAPTURE') in _TRUE_VALUES:
|
|
self._stdout_fixture = fixtures.StringStream('stdout')
|
|
self.stdout = self.useFixture(self._stdout_fixture).stream
|
|
self.useFixture(fixtures.MonkeyPatch('sys.stdout', self.stdout))
|
|
if os.environ.get('OS_STDERR_CAPTURE') in _TRUE_VALUES:
|
|
self._stderr_fixture = fixtures.StringStream('stderr')
|
|
self.stderr = self.useFixture(self._stderr_fixture).stream
|
|
self.useFixture(fixtures.MonkeyPatch('sys.stderr', self.stderr))
|