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d8866d7277
Before, caches were global and so different instances of the stores would share caches. This caused problems in the unit tests.
197 lines
4.5 KiB
Python
197 lines
4.5 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2015 OpenMarket Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from tests import unittest
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from twisted.internet import defer
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from synapse.storage._base import Cache, cached
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class CacheTestCase(unittest.TestCase):
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def setUp(self):
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self.cache = Cache("test")
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def test_empty(self):
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failed = False
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try:
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self.cache.get("foo")
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except KeyError:
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failed = True
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self.assertTrue(failed)
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def test_hit(self):
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self.cache.prefill("foo", 123)
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self.assertEquals(self.cache.get("foo"), 123)
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def test_invalidate(self):
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self.cache.prefill("foo", 123)
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self.cache.invalidate("foo")
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failed = False
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try:
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self.cache.get("foo")
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except KeyError:
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failed = True
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self.assertTrue(failed)
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def test_eviction(self):
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cache = Cache("test", max_entries=2)
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cache.prefill(1, "one")
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cache.prefill(2, "two")
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cache.prefill(3, "three") # 1 will be evicted
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failed = False
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try:
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cache.get(1)
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except KeyError:
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failed = True
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self.assertTrue(failed)
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cache.get(2)
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cache.get(3)
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def test_eviction_lru(self):
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cache = Cache("test", max_entries=2, lru=True)
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cache.prefill(1, "one")
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cache.prefill(2, "two")
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# Now access 1 again, thus causing 2 to be least-recently used
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cache.get(1)
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cache.prefill(3, "three")
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failed = False
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try:
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cache.get(2)
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except KeyError:
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failed = True
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self.assertTrue(failed)
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cache.get(1)
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cache.get(3)
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class CacheDecoratorTestCase(unittest.TestCase):
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@defer.inlineCallbacks
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def test_passthrough(self):
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class A(object):
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@cached()
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def func(self, key):
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return key
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a = A()
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self.assertEquals((yield a.func("foo")), "foo")
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self.assertEquals((yield a.func("bar")), "bar")
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@defer.inlineCallbacks
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def test_hit(self):
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callcount = [0]
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class A(object):
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@cached()
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def func(self, key):
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callcount[0] += 1
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return key
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a = A()
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yield a.func("foo")
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self.assertEquals(callcount[0], 1)
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self.assertEquals((yield a.func("foo")), "foo")
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self.assertEquals(callcount[0], 1)
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@defer.inlineCallbacks
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def test_invalidate(self):
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callcount = [0]
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class A(object):
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@cached()
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def func(self, key):
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callcount[0] += 1
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return key
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a = A()
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yield a.func("foo")
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self.assertEquals(callcount[0], 1)
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a.func.invalidate("foo")
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yield a.func("foo")
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self.assertEquals(callcount[0], 2)
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def test_invalidate_missing(self):
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class A(object):
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@cached()
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def func(self, key):
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return key
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A().func.invalidate("what")
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@defer.inlineCallbacks
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def test_max_entries(self):
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callcount = [0]
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class A(object):
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@cached(max_entries=10)
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def func(self, key):
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callcount[0] += 1
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return key
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a = A()
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for k in range(0, 12):
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yield a.func(k)
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self.assertEquals(callcount[0], 12)
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# There must have been at least 2 evictions, meaning if we calculate
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# all 12 values again, we must get called at least 2 more times
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for k in range(0,12):
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yield a.func(k)
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self.assertTrue(callcount[0] >= 14,
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msg="Expected callcount >= 14, got %d" % (callcount[0]))
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@defer.inlineCallbacks
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def test_prefill(self):
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callcount = [0]
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class A(object):
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@cached()
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def func(self, key):
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callcount[0] += 1
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return key
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a = A()
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a.func.prefill("foo", 123)
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self.assertEquals((yield a.func("foo")), 123)
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self.assertEquals(callcount[0], 0)
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