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# Copyright (c) 2010-2012 OpenStack, LLC.
#
# 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 unittest
from ConfigParser import NoSectionError, NoOptionError
from webob import Request
from swift.common.middleware import memcache
from swift.common.memcached import MemcacheRing
class FakeApp(object):
def __call__(self, env, start_response):
return env
class ExcConfigParser(object):
def read(self, path):
raise Exception('read called with %r' % path)
class EmptyConfigParser(object):
def read(self, path):
return False
class SetConfigParser(object):
def read(self, path):
return True
def get(self, section, option):
if section == 'memcache':
if option == 'memcache_servers':
return '1.2.3.4:5'
elif option == 'memcache_serialization_support':
return '2'
else:
raise NoOptionError(option)
else:
raise NoSectionError(option)
def start_response(*args):
pass
class TestCacheMiddleware(unittest.TestCase):
def setUp(self):
self.app = memcache.MemcacheMiddleware(FakeApp(), {})
def test_cache_middleware(self):
req = Request.blank('/something', environ={'REQUEST_METHOD': 'GET'})
resp = self.app(req.environ, start_response)
self.assertTrue('swift.cache' in resp)
self.assertTrue(isinstance(resp['swift.cache'], MemcacheRing))
def test_conf_default_read(self):
orig_parser = memcache.ConfigParser
memcache.ConfigParser = ExcConfigParser
exc = None
try:
app = memcache.MemcacheMiddleware(FakeApp(), {})
except Exception, err:
exc = err
finally:
memcache.ConfigParser = orig_parser
self.assertEquals(str(exc),
"read called with '/etc/swift/memcache.conf'")
def test_conf_set_no_read(self):
orig_parser = memcache.ConfigParser
memcache.ConfigParser = ExcConfigParser
exc = None
try:
app = memcache.MemcacheMiddleware(
FakeApp(), {'memcache_servers': '1.2.3.4:5',
'memcache_serialization_support': '2'})
except Exception, err:
exc = err
finally:
memcache.ConfigParser = orig_parser
self.assertEquals(exc, None)
def test_conf_default(self):
orig_parser = memcache.ConfigParser
memcache.ConfigParser = EmptyConfigParser
try:
app = memcache.MemcacheMiddleware(FakeApp(), {})
finally:
memcache.ConfigParser = orig_parser
self.assertEquals(app.memcache_servers, '127.0.0.1:11211')
def test_conf_from_extra_conf(self):
orig_parser = memcache.ConfigParser
memcache.ConfigParser = SetConfigParser
try:
app = memcache.MemcacheMiddleware(FakeApp(), {})
finally:
memcache.ConfigParser = orig_parser
self.assertEquals(app.memcache_servers, '1.2.3.4:5')
def test_conf_from_inline_conf(self):
orig_parser = memcache.ConfigParser
memcache.ConfigParser = SetConfigParser
try:
app = memcache.MemcacheMiddleware(
FakeApp(), {'memcache_servers': '6.7.8.9:10'})
finally:
memcache.ConfigParser = orig_parser
self.assertEquals(app.memcache_servers, '6.7.8.9:10')
if __name__ == '__main__':
unittest.main()
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