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from django.db import transaction
from django.test import TestCase, override_settings
from cacheops import cached_as, no_invalidation, invalidate_obj, invalidate_model, invalidate_all
from cacheops.conf import settings
from cacheops.signals import cache_read, cache_invalidated
from .utils import BaseTestCase, make_inc
from .models import Post, Category, Local, DbAgnostic, DbBinded
class SettingsTests(TestCase):
def test_context_manager(self):
self.assertTrue(settings.CACHEOPS_ENABLED)
with self.settings(CACHEOPS_ENABLED=False):
self.assertFalse(settings.CACHEOPS_ENABLED)
@override_settings(CACHEOPS_ENABLED=False)
def test_decorator(self):
self.assertFalse(settings.CACHEOPS_ENABLED)
@override_settings(CACHEOPS_ENABLED=False)
class ClassOverrideSettingsTests(TestCase):
def test_class(self):
self.assertFalse(settings.CACHEOPS_ENABLED)
class SignalsTests(BaseTestCase):
def setUp(self):
super(SignalsTests, self).setUp()
def set_signal(signal=None, **kwargs):
self.signal_calls.append(kwargs)
self.signal_calls = []
cache_read.connect(set_signal, dispatch_uid=1, weak=False)
def tearDown(self):
super(SignalsTests, self).tearDown()
cache_read.disconnect(dispatch_uid=1)
def test_queryset(self):
# Miss
test_model = Category.objects.create(title="foo")
Category.objects.cache().get(id=test_model.id)
self.assertEqual(self.signal_calls, [{'sender': Category, 'func': None, 'hit': False}])
# Hit
self.signal_calls = []
Category.objects.cache().get(id=test_model.id) # hit
self.assertEqual(self.signal_calls, [{'sender': Category, 'func': None, 'hit': True}])
def test_queryset_empty(self):
list(Category.objects.cache().filter(pk__in=[]))
self.assertEqual(self.signal_calls, [{'sender': Category, 'func': None, 'hit': False}])
def test_cached_as(self):
get_calls = make_inc(cached_as(Category.objects.filter(title='test')))
func = get_calls.__wrapped__
# Miss
self.assertEqual(get_calls(), 1)
self.assertEqual(self.signal_calls, [{'sender': None, 'func': func, 'hit': False}])
# Hit
self.signal_calls = []
self.assertEqual(get_calls(), 1)
self.assertEqual(self.signal_calls, [{'sender': None, 'func': func, 'hit': True}])
def test_invalidation_signal(self):
def set_signal(signal=None, **kwargs):
signal_calls.append(kwargs)
signal_calls = []
cache_invalidated.connect(set_signal, dispatch_uid=1, weak=False)
invalidate_all()
invalidate_model(Post)
c = Category.objects.create(title='Hey')
self.assertEqual(signal_calls, [
{'sender': None, 'obj_dict': None},
{'sender': Post, 'obj_dict': None},
{'sender': Category, 'obj_dict': {'id': c.pk, 'title': 'Hey'}},
])
class LockingTests(BaseTestCase):
def test_lock(self):
import random
import threading
from .utils import ThreadWithReturnValue
from before_after import before
@cached_as(Post, lock=True, timeout=60)
def func():
return random.random()
results = []
locked = threading.Event()
thread = [None]
def second_thread():
def _target():
try:
with before('redis.Redis.brpoplpush', lambda *a, **kw: locked.set()):
results.append(func())
except Exception:
locked.set()
raise
thread[0] = ThreadWithReturnValue(target=_target)
thread[0].start()
assert locked.wait(1) # Wait until right before the block
with before('random.random', second_thread):
results.append(func())
thread[0].join()
self.assertEqual(results[0], results[1])
class NoInvalidationTests(BaseTestCase):
fixtures = ['basic']
def _template(self, invalidate):
post = Post.objects.cache().get(pk=1)
invalidate(post)
with self.assertNumQueries(0):
Post.objects.cache().get(pk=1)
def test_context_manager(self):
def invalidate(post):
with no_invalidation:
invalidate_obj(post)
self._template(invalidate)
def test_decorator(self):
self._template(no_invalidation(invalidate_obj))
def test_nested(self):
def invalidate(post):
with no_invalidation:
with no_invalidation:
pass
invalidate_obj(post)
self._template(invalidate)
def test_in_transaction(self):
with transaction.atomic():
post = Post.objects.cache().get(pk=1)
with no_invalidation:
post.save()
with self.assertNumQueries(0):
Post.objects.cache().get(pk=1)
class LocalGetTests(BaseTestCase):
def setUp(self):
Local.objects.create(pk=1)
super(LocalGetTests, self).setUp()
def test_unhashable_args(self):
Local.objects.cache().get(pk__in=[1, 2])
class DbAgnosticTests(BaseTestCase):
databases = ('default', 'slave')
def test_db_agnostic_by_default(self):
list(DbAgnostic.objects.cache())
with self.assertNumQueries(0, using='slave'):
list(DbAgnostic.objects.cache().using('slave'))
def test_db_agnostic_disabled(self):
list(DbBinded.objects.cache())
with self.assertNumQueries(1, using='slave'):
list(DbBinded.objects.cache().using('slave'))
def test_model_family():
from cacheops.utils import model_family
from .models import Abs, Concrete1, AbsChild, Concrete2
from .models import NoProfile, NoProfileProxy, AbsNoProfile, NoProfileChild
from .models import ParentId, ParentStr, Mess, MessChild
# Abstract models do not have family, children of an abstract model are not a family
assert model_family(Abs) == set()
assert model_family(Concrete1) == {Concrete1}
assert model_family(AbsChild) == set()
assert model_family(Concrete2) == {Concrete2}
# Everything in but an abstract model
assert model_family(NoProfile) == {NoProfile, NoProfileProxy, NoProfileChild}
assert model_family(NoProfileProxy) == {NoProfile, NoProfileProxy, NoProfileChild}
assert model_family(AbsNoProfile) == set()
assert model_family(NoProfileChild) == {NoProfile, NoProfileProxy, NoProfileChild}
# The worst of multiple inheritance
assert model_family(Mess) == {Mess, MessChild, ParentId, ParentStr}
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