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OpenStack Study: test.py

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# vim: tabstop=4 shiftwidth=4 softtabstop=4

# Copyright (c) 2013 Hewlett-Packard Development Company, L.P.

# All Rights Reserved.

#

# 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.

"""Common utilities used in testing"""

import os

import fixtures

import testtools

_TRUE_VALUES = ('True', 'true', '1', 'yes')

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class BaseTestCase(testtools.TestCase):

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    def setUp(self):

        super(BaseTestCase, self).setUp()

        self._set_timeout()

        self._fake_output()

        self.useFixture(fixtures.FakeLogger('glance.openstack.common'))

        self.useFixture(fixtures.NestedTempfile())

        self.useFixture(fixtures.TempHomeDir())

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    def _set_timeout(self):

        test_timeout = os.environ.get('OS_TEST_TIMEOUT', 0)

        try:

            test_timeout = int(test_timeout)

        except ValueError:

            # If timeout value is invalid do not set a timeout.

            test_timeout = 0

        if test_timeout > 0:

            self.useFixture(fixtures.Timeout(test_timeout, gentle=True))

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    def _fake_output(self):

        if os.environ.get('OS_STDOUT_CAPTURE') in _TRUE_VALUES:

            stdout = self.useFixture(fixtures.StringStream('stdout')).stream

            self.useFixture(fixtures.MonkeyPatch('sys.stdout', stdout))

        if os.environ.get('OS_STDERR_CAPTURE') in _TRUE_VALUES:

            stderr = self.useFixture(fixtures.StringStream('stderr')).stream

            self.useFixture(fixtures.MonkeyPatch('sys.stderr', stderr))