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# -*- coding: utf-8 -*-
# Copyright (C) 2013 Rackspace Hosting 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.
import contextlib
import os
import shutil
import tempfile
from oslo_utils import uuidutils
import testscenarios
from taskflow import exceptions as exc
from taskflow.persistence import backends
from taskflow.persistence.backends import impl_dir
from taskflow.persistence import models
from taskflow import test
from taskflow.tests.unit.persistence import base
class DirPersistenceTest(testscenarios.TestWithScenarios,
test.TestCase, base.PersistenceTestMixin):
scenarios = [
('no_cache', {'max_cache_size': None}),
('one', {'max_cache_size': 1}),
('tiny', {'max_cache_size': 256}),
('medimum', {'max_cache_size': 512}),
('large', {'max_cache_size': 1024}),
]
def _get_connection(self):
return self.backend.get_connection()
def setUp(self):
super(DirPersistenceTest, self).setUp()
self.path = tempfile.mkdtemp()
self.backend = impl_dir.DirBackend({
'path': self.path,
'max_cache_size': self.max_cache_size,
})
with contextlib.closing(self._get_connection()) as conn:
conn.upgrade()
def tearDown(self):
super(DirPersistenceTest, self).tearDown()
if self.path and os.path.isdir(self.path):
shutil.rmtree(self.path)
self.path = None
self.backend = None
def _check_backend(self, conf):
with contextlib.closing(backends.fetch(conf)) as be:
self.assertIsInstance(be, impl_dir.DirBackend)
def test_dir_backend_invalid_cache_size(self):
for invalid_size in [-1024, 0, -1]:
conf = {
'path': self.path,
'max_cache_size': invalid_size,
}
self.assertRaises(ValueError, impl_dir.DirBackend, conf)
def test_dir_backend_cache_overfill(self):
if self.max_cache_size is not None:
# Ensure cache never goes past the desired max size...
books_ids_made = []
with contextlib.closing(self._get_connection()) as conn:
for i in range(0, int(1.5 * self.max_cache_size)):
lb_name = 'book-%s' % (i)
lb_id = uuidutils.generate_uuid()
lb = models.LogBook(name=lb_name, uuid=lb_id)
self.assertRaises(exc.NotFound, conn.get_logbook, lb_id)
conn.save_logbook(lb)
books_ids_made.append(lb_id)
self.assertLessEqual(self.backend.file_cache.currsize,
self.max_cache_size)
# Also ensure that we can still read all created books...
with contextlib.closing(self._get_connection()) as conn:
for lb_id in books_ids_made:
lb = conn.get_logbook(lb_id)
self.assertIsNotNone(lb)
def test_dir_backend_entry_point(self):
self._check_backend(dict(connection='dir:', path=self.path))
def test_dir_backend_name(self):
self._check_backend(dict(connection='dir', # no colon
path=self.path))
def test_file_backend_entry_point(self):
self._check_backend(dict(connection='file:', path=self.path))
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