synapse/tests/storage/test__base.py
Erik Johnston d8866d7277 Caches should be bound to instances.
Before, caches were global and so different instances of the stores
would share caches. This caused problems in the unit tests.
2015-06-03 14:45:17 +01:00

196 lines
4.5 KiB
Python

# -*- coding: utf-8 -*-
# Copyright 2015 OpenMarket Ltd
#
# 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.
from tests import unittest
from twisted.internet import defer
from synapse.storage._base import Cache, cached
class CacheTestCase(unittest.TestCase):
def setUp(self):
self.cache = Cache("test")
def test_empty(self):
failed = False
try:
self.cache.get("foo")
except KeyError:
failed = True
self.assertTrue(failed)
def test_hit(self):
self.cache.prefill("foo", 123)
self.assertEquals(self.cache.get("foo"), 123)
def test_invalidate(self):
self.cache.prefill("foo", 123)
self.cache.invalidate("foo")
failed = False
try:
self.cache.get("foo")
except KeyError:
failed = True
self.assertTrue(failed)
def test_eviction(self):
cache = Cache("test", max_entries=2)
cache.prefill(1, "one")
cache.prefill(2, "two")
cache.prefill(3, "three") # 1 will be evicted
failed = False
try:
cache.get(1)
except KeyError:
failed = True
self.assertTrue(failed)
cache.get(2)
cache.get(3)
def test_eviction_lru(self):
cache = Cache("test", max_entries=2, lru=True)
cache.prefill(1, "one")
cache.prefill(2, "two")
# Now access 1 again, thus causing 2 to be least-recently used
cache.get(1)
cache.prefill(3, "three")
failed = False
try:
cache.get(2)
except KeyError:
failed = True
self.assertTrue(failed)
cache.get(1)
cache.get(3)
class CacheDecoratorTestCase(unittest.TestCase):
@defer.inlineCallbacks
def test_passthrough(self):
class A(object):
@cached()
def func(self, key):
return key
a = A()
self.assertEquals((yield a.func("foo")), "foo")
self.assertEquals((yield a.func("bar")), "bar")
@defer.inlineCallbacks
def test_hit(self):
callcount = [0]
class A(object):
@cached()
def func(self, key):
callcount[0] += 1
return key
a = A()
yield a.func("foo")
self.assertEquals(callcount[0], 1)
self.assertEquals((yield a.func("foo")), "foo")
self.assertEquals(callcount[0], 1)
@defer.inlineCallbacks
def test_invalidate(self):
callcount = [0]
class A(object):
@cached()
def func(self, key):
callcount[0] += 1
return key
a = A()
yield a.func("foo")
self.assertEquals(callcount[0], 1)
a.func.invalidate("foo")
yield a.func("foo")
self.assertEquals(callcount[0], 2)
def test_invalidate_missing(self):
class A(object):
@cached()
def func(self, key):
return key
A().func.invalidate("what")
@defer.inlineCallbacks
def test_max_entries(self):
callcount = [0]
class A(object):
@cached(max_entries=10)
def func(self, key):
callcount[0] += 1
return key
a = A()
for k in range(0, 12):
yield a.func(k)
self.assertEquals(callcount[0], 12)
# There must have been at least 2 evictions, meaning if we calculate
# all 12 values again, we must get called at least 2 more times
for k in range(0,12):
yield a.func(k)
self.assertTrue(callcount[0] >= 14,
msg="Expected callcount >= 14, got %d" % (callcount[0]))
@defer.inlineCallbacks
def test_prefill(self):
callcount = [0]
class A(object):
@cached()
def func(self, key):
callcount[0] += 1
return key
a = A()
a.func.prefill("foo", 123)
self.assertEquals((yield a.func("foo")), 123)
self.assertEquals(callcount[0], 0)