mirror of
https://github.com/element-hq/synapse
synced 2024-07-15 05:54:06 +00:00
138 lines
3.8 KiB
Python
138 lines
3.8 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2020 The Matrix.org Foundation C.I.C.
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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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import unittest
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from functools import partial
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from twisted.internet import defer
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from synapse.util.caches.deferred_cache import DeferredCache
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class DeferredCacheTestCase(unittest.TestCase):
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def test_empty(self):
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cache = DeferredCache("test")
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failed = False
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try:
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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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cache = DeferredCache("test")
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cache.prefill("foo", 123)
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self.assertEquals(cache.get("foo"), 123)
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def test_invalidate(self):
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cache = DeferredCache("test")
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cache.prefill(("foo",), 123)
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cache.invalidate(("foo",))
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failed = False
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try:
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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_invalidate_all(self):
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cache = DeferredCache("testcache")
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callback_record = [False, False]
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def record_callback(idx):
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callback_record[idx] = True
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# add a couple of pending entries
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d1 = defer.Deferred()
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cache.set("key1", d1, partial(record_callback, 0))
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d2 = defer.Deferred()
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cache.set("key2", d2, partial(record_callback, 1))
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# lookup should return observable deferreds
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self.assertFalse(cache.get("key1").has_called())
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self.assertFalse(cache.get("key2").has_called())
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# let one of the lookups complete
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d2.callback("result2")
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# for now at least, the cache will return real results rather than an
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# observabledeferred
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self.assertEqual(cache.get("key2"), "result2")
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# now do the invalidation
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cache.invalidate_all()
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# lookup should return none
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self.assertIsNone(cache.get("key1", None))
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self.assertIsNone(cache.get("key2", None))
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# both callbacks should have been callbacked
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self.assertTrue(callback_record[0], "Invalidation callback for key1 not called")
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self.assertTrue(callback_record[1], "Invalidation callback for key2 not called")
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# letting the other lookup complete should do nothing
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d1.callback("result1")
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self.assertIsNone(cache.get("key1", None))
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def test_eviction(self):
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cache = DeferredCache(
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"test", max_entries=2, apply_cache_factor_from_config=False
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)
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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 = DeferredCache(
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"test", max_entries=2, apply_cache_factor_from_config=False
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)
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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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