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# coding: utf-8
import mock
import os
from beaker.cache import clsmap, Cache, util
from beaker.middleware import CacheMiddleware, SessionMiddleware
from beaker.exceptions import InvalidCacheBackendError
from nose import SkipTest
import unittest
try:
from webtest import TestApp
except ImportError:
TestApp = None
try:
from beaker.ext import memcached
client = memcached._load_client()
except InvalidCacheBackendError:
raise SkipTest("an appropriate memcached backend is not installed")
mc_url = '127.0.0.1:11211'
c =client.Client([mc_url])
c.set('x', 'y')
if not c.get('x'):
raise SkipTest("Memcached is not running at %s" % mc_url)
def teardown():
import shutil
shutil.rmtree('./cache', True)
def simple_session_app(environ, start_response):
session = environ['beaker.session']
sess_id = environ.get('SESSION_ID')
if environ['PATH_INFO'].startswith('/invalid'):
# Attempt to access the session
id = session.id
session['value'] = 2
else:
if sess_id:
session = session.get_by_id(sess_id)
if not session:
start_response('200 OK', [('Content-type', 'text/plain')])
return ["No session id of %s found." % sess_id]
if not session.has_key('value'):
session['value'] = 0
session['value'] += 1
if not environ['PATH_INFO'].startswith('/nosave'):
session.save()
start_response('200 OK', [('Content-type', 'text/plain')])
return ['The current value is: %d, session id is %s' % (session['value'],
session.id)]
def simple_app(environ, start_response):
extra_args = {}
clear = False
if environ.get('beaker.clear'):
clear = True
extra_args['type'] = 'ext:memcached'
extra_args['url'] = mc_url
extra_args['data_dir'] = './cache'
cache = environ['beaker.cache'].get_cache('testcache', **extra_args)
if clear:
cache.clear()
try:
value = cache.get_value('value')
except:
value = 0
cache.set_value('value', value+1)
start_response('200 OK', [('Content-type', 'text/plain')])
return ['The current value is: %s' % cache.get_value('value')]
def using_none_app(environ, start_response):
extra_args = {}
clear = False
if environ.get('beaker.clear'):
clear = True
extra_args['type'] = 'ext:memcached'
extra_args['url'] = mc_url
extra_args['data_dir'] = './cache'
cache = environ['beaker.cache'].get_cache('testcache', **extra_args)
if clear:
cache.clear()
try:
value = cache.get_value('value')
except:
value = 10
cache.set_value('value', None)
start_response('200 OK', [('Content-type', 'text/plain')])
return ['The current value is: %s' % value]
def cache_manager_app(environ, start_response):
cm = environ['beaker.cache']
cm.get_cache('test')['test_key'] = 'test value'
start_response('200 OK', [('Content-type', 'text/plain')])
yield "test_key is: %s\n" % cm.get_cache('test')['test_key']
cm.get_cache('test').clear()
try:
test_value = cm.get_cache('test')['test_key']
except KeyError:
yield "test_key cleared"
else:
yield "test_key wasn't cleared, is: %s\n" % \
cm.get_cache('test')['test_key']
@util.skip_if(lambda: TestApp is None, "webtest not installed")
def test_session():
app = TestApp(SessionMiddleware(simple_session_app, data_dir='./cache', type='ext:memcached', url=mc_url))
res = app.get('/')
assert 'current value is: 1' in res
res = app.get('/')
assert 'current value is: 2' in res
res = app.get('/')
assert 'current value is: 3' in res
@util.skip_if(lambda: TestApp is None, "webtest not installed")
def test_session_invalid():
app = TestApp(SessionMiddleware(simple_session_app, data_dir='./cache', type='ext:memcached', url=mc_url))
res = app.get('/invalid', headers=dict(Cookie='beaker.session.id=df7324911e246b70b5781c3c58328442; Path=/'))
assert 'current value is: 2' in res
def test_has_key():
cache = Cache('test', data_dir='./cache', url=mc_url, type='ext:memcached')
o = object()
cache.set_value("test", o)
assert cache.has_key("test")
assert "test" in cache
assert not cache.has_key("foo")
assert "foo" not in cache
cache.remove_value("test")
assert not cache.has_key("test")
def test_dropping_keys():
cache = Cache('test', data_dir='./cache', url=mc_url, type='ext:memcached')
cache.set_value('test', 20)
cache.set_value('fred', 10)
assert cache.has_key('test')
assert 'test' in cache
assert cache.has_key('fred')
# Directly nuke the actual key, to simulate it being removed by memcached
cache.namespace.mc.delete('test_test')
assert not cache.has_key('test')
assert cache.has_key('fred')
# Nuke the keys dict, it might die, who knows
cache.namespace.mc.delete('test:keys')
assert cache.has_key('fred')
# And we still need clear to work, even if it won't work well
cache.clear()
def test_deleting_keys():
cache = Cache('test', data_dir='./cache', url=mc_url, type='ext:memcached')
cache.set_value('test', 20)
# Nuke the keys dict, it might die, who knows
cache.namespace.mc.delete('test:keys')
assert cache.has_key('test')
# make sure we can still delete keys even though our keys dict got nuked
del cache['test']
assert not cache.has_key('test')
def test_has_key_multicache():
cache = Cache('test', data_dir='./cache', url=mc_url, type='ext:memcached')
o = object()
cache.set_value("test", o)
assert cache.has_key("test")
assert "test" in cache
cache = Cache('test', data_dir='./cache', url=mc_url, type='ext:memcached')
assert cache.has_key("test")
def test_unicode_keys():
cache = Cache('test', data_dir='./cache', url=mc_url, type='ext:memcached')
o = object()
cache.set_value(u'hiŏ', o)
assert u'hiŏ' in cache
assert u'hŏa' not in cache
cache.remove_value(u'hiŏ')
assert u'hiŏ' not in cache
def test_spaces_in_unicode_keys():
cache = Cache('test', data_dir='./cache', url=mc_url, type='ext:memcached')
o = object()
cache.set_value(u'hi ŏ', o)
assert u'hi ŏ' in cache
assert u'hŏa' not in cache
cache.remove_value(u'hi ŏ')
assert u'hi ŏ' not in cache
def test_spaces_in_keys():
cache = Cache('test', data_dir='./cache', url=mc_url, type='ext:memcached')
cache.set_value("has space", 24)
assert cache.has_key("has space")
assert 24 == cache.get_value("has space")
cache.set_value("hasspace", 42)
assert cache.has_key("hasspace")
assert 42 == cache.get_value("hasspace")
@util.skip_if(lambda: TestApp is None, "webtest not installed")
def test_increment():
app = TestApp(CacheMiddleware(simple_app))
res = app.get('/', extra_environ={'beaker.clear':True})
assert 'current value is: 1' in res
res = app.get('/')
assert 'current value is: 2' in res
res = app.get('/')
assert 'current value is: 3' in res
app = TestApp(CacheMiddleware(simple_app))
res = app.get('/', extra_environ={'beaker.clear':True})
assert 'current value is: 1' in res
res = app.get('/')
assert 'current value is: 2' in res
res = app.get('/')
assert 'current value is: 3' in res
@util.skip_if(lambda: TestApp is None, "webtest not installed")
def test_cache_manager():
app = TestApp(CacheMiddleware(cache_manager_app))
res = app.get('/')
assert 'test_key is: test value' in res
assert 'test_key cleared' in res
@util.skip_if(lambda: TestApp is None, "webtest not installed")
def test_store_none():
app = TestApp(CacheMiddleware(using_none_app))
res = app.get('/', extra_environ={'beaker.clear':True})
assert 'current value is: 10' in res
res = app.get('/')
assert 'current value is: None' in res
class TestPylibmcInit(unittest.TestCase):
def setUp(self):
from beaker.ext import memcached
try:
import pylibmc as memcache
except:
import memcache
memcached._client_libs['pylibmc'] = memcached.pylibmc = memcache
from contextlib import contextmanager
class ThreadMappedPool(dict):
"a mock of pylibmc's ThreadMappedPool"
def __init__(self, master):
self.master = master
@contextmanager
def reserve(self):
yield self.master
memcache.ThreadMappedPool = ThreadMappedPool
def test_uses_pylibmc_client(self):
from beaker.ext import memcached
cache = Cache('test', data_dir='./cache',
memcache_module='pylibmc',
url=mc_url, type="ext:memcached")
assert isinstance(cache.namespace, memcached.PyLibMCNamespaceManager)
def test_dont_use_pylibmc_client(self):
from beaker.ext.memcached import _load_client
load_mock = mock.Mock()
load_mock.return_value = _load_client('memcache')
with mock.patch('beaker.ext.memcached._load_client', load_mock):
cache = Cache('test', data_dir='./cache', url=mc_url, type="ext:memcached")
assert not isinstance(cache.namespace, memcached.PyLibMCNamespaceManager)
assert isinstance(cache.namespace, memcached.MemcachedNamespaceManager)
def test_client(self):
cache = Cache('test', data_dir='./cache', url=mc_url, type="ext:memcached")
o = object()
cache.set_value("test", o)
assert cache.has_key("test")
assert "test" in cache
assert not cache.has_key("foo")
assert "foo" not in cache
cache.remove_value("test")
assert not cache.has_key("test")
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