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# Copyright (c) 2020 OpenStack Foundation.
# 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.
"""Test the cache handler module"""
import os
from unittest import mock
import fixtures
import oslo_config
from oslotest import base as test_base
from oslo_policy import _cache_handler as _ch
class CacheHandlerTest(test_base.BaseTestCase):
def setUp(self):
super().setUp()
self.tmpdir = self.useFixture(fixtures.TempDir())
def test_read_cached_file(self):
file_cache = {}
path = os.path.join(self.tmpdir.path, 'tmpfile')
with open(path, 'w+') as fp:
fp.write('test')
reloaded, data = _ch.read_cached_file(file_cache, path)
self.assertEqual('test', data)
self.assertTrue(reloaded)
reloaded, data = _ch.read_cached_file(file_cache, path)
self.assertEqual('test', data)
self.assertFalse(reloaded)
reloaded, data = _ch.read_cached_file(
file_cache, path, force_reload=True)
self.assertEqual('test', data)
self.assertTrue(reloaded)
def test_read_cached_file_with_updates(self):
file_cache = {}
path = os.path.join(self.tmpdir.path, 'tmpfile')
with open(path, 'w+') as fp:
fp.write('test')
reloaded, data = _ch.read_cached_file(file_cache, path)
# update the timestamps
times = (os.stat(path).st_atime + 1, os.stat(path).st_mtime + 1)
os.utime(path, times)
reloaded, data = _ch.read_cached_file(file_cache, path)
self.assertTrue(reloaded)
@mock.patch.object(_ch, 'LOG')
def test_reloading_cache_with_permission_denied(self, mock_log):
file_cache = {}
path = os.path.join(self.tmpdir.path, 'tmpfile')
with open(path, 'w+') as fp:
fp.write('test')
os.chmod(path, 000)
self.assertRaises(
oslo_config.cfg.ConfigFilesPermissionDeniedError,
_ch.read_cached_file, file_cache, path)
mock_log.error.assert_called_once()
@mock.patch.object(_ch, 'LOG')
def test_reloading_on_removed_file(self, mock_log):
file_cache = {}
# don't actually create the file
path = os.path.join(self.tmpdir.path, 'tmpfile')
reloaded, data = _ch.read_cached_file(file_cache, path)
self.assertEqual({}, data)
self.assertTrue(reloaded)
mock_log.error.assert_called_once()
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