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# fixtures: Fixtures with cleanups for testing and convenience.
#
# Copyright (c) 2010, 2011, 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.
import os
import testtools
from fixtures import EnvironmentVariable, TestWithFixtures
class TestEnvironmentVariable(testtools.TestCase, TestWithFixtures):
def test_setup_ignores_missing(self):
fixture = EnvironmentVariable('FIXTURES_TEST_VAR')
os.environ.pop('FIXTURES_TEST_VAR', '')
self.useFixture(fixture)
self.assertEqual(None, os.environ.get('FIXTURES_TEST_VAR'))
def test_setup_sets_when_missing(self):
fixture = EnvironmentVariable('FIXTURES_TEST_VAR', 'bar')
os.environ.pop('FIXTURES_TEST_VAR', '')
self.useFixture(fixture)
self.assertEqual('bar', os.environ.get('FIXTURES_TEST_VAR'))
def test_setup_deletes(self):
fixture = EnvironmentVariable('FIXTURES_TEST_VAR')
os.environ['FIXTURES_TEST_VAR'] = 'foo'
self.useFixture(fixture)
self.assertEqual(None, os.environ.get('FIXTURES_TEST_VAR'))
def test_setup_overrides(self):
fixture = EnvironmentVariable('FIXTURES_TEST_VAR', 'bar')
os.environ['FIXTURES_TEST_VAR'] = 'foo'
self.useFixture(fixture)
self.assertEqual('bar', os.environ.get('FIXTURES_TEST_VAR'))
def test_cleanup_deletes_when_missing(self):
fixture = EnvironmentVariable('FIXTURES_TEST_VAR')
os.environ.pop('FIXTURES_TEST_VAR', '')
with fixture:
os.environ['FIXTURES_TEST_VAR'] = 'foo'
self.assertEqual(None, os.environ.get('FIXTURES_TEST_VAR'))
def test_cleanup_deletes_when_set(self):
fixture = EnvironmentVariable('FIXTURES_TEST_VAR', 'bar')
os.environ.pop('FIXTURES_TEST_VAR', '')
with fixture:
os.environ['FIXTURES_TEST_VAR'] = 'foo'
self.assertEqual(None, os.environ.get('FIXTURES_TEST_VAR'))
def test_cleanup_restores_when_missing(self):
fixture = EnvironmentVariable('FIXTURES_TEST_VAR')
os.environ['FIXTURES_TEST_VAR'] = 'bar'
with fixture:
os.environ.pop('FIXTURES_TEST_VAR', '')
self.assertEqual('bar', os.environ.get('FIXTURES_TEST_VAR'))
def test_cleanup_restores_when_set(self):
fixture = EnvironmentVariable('FIXTURES_TEST_VAR')
os.environ['FIXTURES_TEST_VAR'] = 'bar'
with fixture:
os.environ['FIXTURES_TEST_VAR'] = 'quux'
self.assertEqual('bar', os.environ.get('FIXTURES_TEST_VAR'))
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