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# -*- 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 cached
class CacheDecoratorTestCase(unittest.TestCase):
@defer.inlineCallbacks
def test_passthrough(self):
@cached()
def func(self, key):
return key
self.assertEquals((yield func(self, "foo")), "foo")
self.assertEquals((yield func(self, "bar")), "bar")
@defer.inlineCallbacks
def test_hit(self):
callcount = [0]
@cached()
def func(self, key):
callcount[0] += 1
return key
yield func(self, "foo")
self.assertEquals(callcount[0], 1)
self.assertEquals((yield func(self, "foo")), "foo")
self.assertEquals(callcount[0], 1)
@defer.inlineCallbacks
def test_invalidate(self):
callcount = [0]
@cached()
def func(self, key):
callcount[0] += 1
return key
yield func(self, "foo")
self.assertEquals(callcount[0], 1)
func.invalidate("foo")
yield func(self, "foo")
self.assertEquals(callcount[0], 2)
def test_invalidate_missing(self):
@cached()
def func(self, key):
return key
func.invalidate("what")
@defer.inlineCallbacks
def test_max_entries(self):
callcount = [0]
@cached(max_entries=10)
def func(self, key):
callcount[0] += 1
return key
for k in range(0,12):
yield func(self, 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 func(self, k)
self.assertTrue(callcount[0] >= 14,
msg="Expected callcount >= 14, got %d" % (callcount[0]))
@defer.inlineCallbacks
def test_prefill(self):
callcount = [0]
@cached()
def func(self, key):
callcount[0] += 1
return key
func.prefill("foo", 123)
self.assertEquals((yield func(self, "foo")), 123)
self.assertEquals(callcount[0], 0)
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