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# Copyright (c) 2013 Hewlett-Packard Development Company, L.P.
#
# 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 json
import os
import fixtures
import testtools
from testtools import matchers
from os_collect_config import cache
class DummyConf:
def __init__(self, cachedir):
class CONFobj:
def __init__(self, cachedir):
self.cachedir = cachedir
self.CONF = CONFobj(cachedir)
class TestCache(testtools.TestCase):
def setUp(self):
super().setUp()
cache_root = self.useFixture(fixtures.TempDir())
self.cache_dir = os.path.join(cache_root.path, 'cache')
self.useFixture(fixtures.MonkeyPatch('os_collect_config.cache.cfg',
DummyConf(self.cache_dir)))
def tearDown(self):
super().tearDown()
def test_cache(self):
# Never seen, so changed is expected.
(changed, path) = cache.store('foo', {'a': 1})
self.assertTrue(changed)
self.assertTrue(os.path.exists(self.cache_dir))
self.assertTrue(os.path.exists(path))
orig_path = '%s.orig' % path
self.assertTrue(os.path.exists(orig_path))
last_path = '%s.last' % path
self.assertFalse(os.path.exists(last_path))
# .orig exists now but not .last so this will shortcut to changed
(changed, path) = cache.store('foo', {'a': 2})
self.assertTrue(changed)
orig_path = '%s.orig' % path
with open(path) as now:
with open(orig_path) as then:
self.assertNotEqual(now.read(), then.read())
# Saves the current copy as .last
cache.commit('foo')
last_path = '%s.last' % path
self.assertTrue(os.path.exists(last_path))
# We committed this already, so we should have no changes
(changed, path) = cache.store('foo', {'a': 2})
self.assertFalse(changed)
cache.commit('foo')
# Fully exercising the line-by-line matching now that a .last exists
(changed, path) = cache.store('foo', {'a': 3})
self.assertTrue(changed)
self.assertTrue(os.path.exists(path))
# And the meta list
list_path = cache.store_meta_list('foo_list', ['foo'])
self.assertTrue(os.path.exists(list_path))
with open(list_path) as list_file:
list_list = json.loads(list_file.read())
self.assertThat(list_list, matchers.IsInstance(list))
self.assertIn(path, list_list)
def test_cache_ignores_json_inequality(self):
content1 = '{"a": "value-a", "b": "value-b"}'
content2 = '{"b": "value-b", "a": "value-a"}'
value1 = json.loads(content1)
value2 = json.loads(content2)
self.assertEqual(value1, value2)
(changed, path) = cache.store('content', value1)
self.assertTrue(changed)
cache.commit('content')
(changed, path) = cache.store('content', value1)
self.assertFalse(changed)
(changed, path) = cache.store('content', value2)
self.assertFalse(changed)
def test_commit_no_cache(self):
self.assertIsNone(cache.commit('neversaved'))
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