/usr/lib/python2.7/dist-packages/celery/tests/backends/test_cache.py is in python-celery 3.1.20-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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import sys
import types
from contextlib import contextmanager
from kombu.utils.encoding import str_to_bytes
from celery import signature
from celery import states
from celery import group
from celery.backends.cache import CacheBackend, DummyClient
from celery.exceptions import ImproperlyConfigured
from celery.five import items, string, text_t
from celery.utils import uuid
from celery.tests.case import (
AppCase, Mock, mask_modules, patch, reset_modules,
)
PY3 = sys.version_info[0] == 3
class SomeClass(object):
def __init__(self, data):
self.data = data
class test_CacheBackend(AppCase):
def setup(self):
self.tb = CacheBackend(backend='memory://', app=self.app)
self.tid = uuid()
def test_no_backend(self):
self.app.conf.CELERY_CACHE_BACKEND = None
with self.assertRaises(ImproperlyConfigured):
CacheBackend(backend=None, app=self.app)
def test_mark_as_done(self):
self.assertEqual(self.tb.get_status(self.tid), states.PENDING)
self.assertIsNone(self.tb.get_result(self.tid))
self.tb.mark_as_done(self.tid, 42)
self.assertEqual(self.tb.get_status(self.tid), states.SUCCESS)
self.assertEqual(self.tb.get_result(self.tid), 42)
def test_is_pickled(self):
result = {'foo': 'baz', 'bar': SomeClass(12345)}
self.tb.mark_as_done(self.tid, result)
# is serialized properly.
rindb = self.tb.get_result(self.tid)
self.assertEqual(rindb.get('foo'), 'baz')
self.assertEqual(rindb.get('bar').data, 12345)
def test_mark_as_failure(self):
try:
raise KeyError('foo')
except KeyError as exception:
self.tb.mark_as_failure(self.tid, exception)
self.assertEqual(self.tb.get_status(self.tid), states.FAILURE)
self.assertIsInstance(self.tb.get_result(self.tid), KeyError)
def test_apply_chord(self):
tb = CacheBackend(backend='memory://', app=self.app)
gid, res = uuid(), [self.app.AsyncResult(uuid()) for _ in range(3)]
tb.apply_chord(group(app=self.app), (), gid, {}, result=res)
@patch('celery.result.GroupResult.restore')
def test_on_chord_part_return(self, restore):
tb = CacheBackend(backend='memory://', app=self.app)
deps = Mock()
deps.__len__ = Mock()
deps.__len__.return_value = 2
restore.return_value = deps
task = Mock()
task.name = 'foobarbaz'
self.app.tasks['foobarbaz'] = task
task.request.chord = signature(task)
gid, res = uuid(), [self.app.AsyncResult(uuid()) for _ in range(3)]
task.request.group = gid
tb.apply_chord(group(app=self.app), (), gid, {}, result=res)
self.assertFalse(deps.join_native.called)
tb.on_chord_part_return(task, 'SUCCESS', 10)
self.assertFalse(deps.join_native.called)
tb.on_chord_part_return(task, 'SUCCESS', 10)
deps.join_native.assert_called_with(propagate=True, timeout=3.0)
deps.delete.assert_called_with()
def test_mget(self):
self.tb.set('foo', 1)
self.tb.set('bar', 2)
self.assertDictEqual(self.tb.mget(['foo', 'bar']),
{'foo': 1, 'bar': 2})
def test_forget(self):
self.tb.mark_as_done(self.tid, {'foo': 'bar'})
x = self.app.AsyncResult(self.tid, backend=self.tb)
x.forget()
self.assertIsNone(x.result)
def test_process_cleanup(self):
self.tb.process_cleanup()
def test_expires_as_int(self):
tb = CacheBackend(backend='memory://', expires=10, app=self.app)
self.assertEqual(tb.expires, 10)
def test_unknown_backend_raises_ImproperlyConfigured(self):
with self.assertRaises(ImproperlyConfigured):
CacheBackend(backend='unknown://', app=self.app)
class MyMemcachedStringEncodingError(Exception):
pass
class MemcachedClient(DummyClient):
def set(self, key, value, *args, **kwargs):
if PY3:
key_t, must_be, not_be, cod = bytes, 'string', 'bytes', 'decode'
else:
key_t, must_be, not_be, cod = text_t, 'bytes', 'string', 'encode'
if isinstance(key, key_t):
raise MyMemcachedStringEncodingError(
'Keys must be {0}, not {1}. Convert your '
'strings using mystring.{2}(charset)!'.format(
must_be, not_be, cod))
return super(MemcachedClient, self).set(key, value, *args, **kwargs)
class MockCacheMixin(object):
@contextmanager
def mock_memcache(self):
memcache = types.ModuleType('memcache')
memcache.Client = MemcachedClient
memcache.Client.__module__ = memcache.__name__
prev, sys.modules['memcache'] = sys.modules.get('memcache'), memcache
try:
yield True
finally:
if prev is not None:
sys.modules['memcache'] = prev
@contextmanager
def mock_pylibmc(self):
pylibmc = types.ModuleType('pylibmc')
pylibmc.Client = MemcachedClient
pylibmc.Client.__module__ = pylibmc.__name__
prev = sys.modules.get('pylibmc')
sys.modules['pylibmc'] = pylibmc
try:
yield True
finally:
if prev is not None:
sys.modules['pylibmc'] = prev
class test_get_best_memcache(AppCase, MockCacheMixin):
def test_pylibmc(self):
with self.mock_pylibmc():
with reset_modules('celery.backends.cache'):
from celery.backends import cache
cache._imp = [None]
self.assertEqual(cache.get_best_memcache()[0].__module__,
'pylibmc')
def test_memcache(self):
with self.mock_memcache():
with reset_modules('celery.backends.cache'):
with mask_modules('pylibmc'):
from celery.backends import cache
cache._imp = [None]
self.assertEqual(cache.get_best_memcache()[0]().__module__,
'memcache')
def test_no_implementations(self):
with mask_modules('pylibmc', 'memcache'):
with reset_modules('celery.backends.cache'):
from celery.backends import cache
cache._imp = [None]
with self.assertRaises(ImproperlyConfigured):
cache.get_best_memcache()
def test_cached(self):
with self.mock_pylibmc():
with reset_modules('celery.backends.cache'):
from celery.backends import cache
cache._imp = [None]
cache.get_best_memcache()[0](behaviors={'foo': 'bar'})
self.assertTrue(cache._imp[0])
cache.get_best_memcache()[0]()
def test_backends(self):
from celery.backends.cache import backends
with self.mock_memcache():
for name, fun in items(backends):
self.assertTrue(fun())
class test_memcache_key(AppCase, MockCacheMixin):
def test_memcache_unicode_key(self):
with self.mock_memcache():
with reset_modules('celery.backends.cache'):
with mask_modules('pylibmc'):
from celery.backends import cache
cache._imp = [None]
task_id, result = string(uuid()), 42
b = cache.CacheBackend(backend='memcache', app=self.app)
b.store_result(task_id, result, status=states.SUCCESS)
self.assertEqual(b.get_result(task_id), result)
def test_memcache_bytes_key(self):
with self.mock_memcache():
with reset_modules('celery.backends.cache'):
with mask_modules('pylibmc'):
from celery.backends import cache
cache._imp = [None]
task_id, result = str_to_bytes(uuid()), 42
b = cache.CacheBackend(backend='memcache', app=self.app)
b.store_result(task_id, result, status=states.SUCCESS)
self.assertEqual(b.get_result(task_id), result)
def test_pylibmc_unicode_key(self):
with reset_modules('celery.backends.cache'):
with self.mock_pylibmc():
from celery.backends import cache
cache._imp = [None]
task_id, result = string(uuid()), 42
b = cache.CacheBackend(backend='memcache', app=self.app)
b.store_result(task_id, result, status=states.SUCCESS)
self.assertEqual(b.get_result(task_id), result)
def test_pylibmc_bytes_key(self):
with reset_modules('celery.backends.cache'):
with self.mock_pylibmc():
from celery.backends import cache
cache._imp = [None]
task_id, result = str_to_bytes(uuid()), 42
b = cache.CacheBackend(backend='memcache', app=self.app)
b.store_result(task_id, result, status=states.SUCCESS)
self.assertEqual(b.get_result(task_id), result)
|