2015-12-23 12:48:03 +01:00
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# -*- coding: utf-8 -*-
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2016-01-07 05:26:29 +01:00
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# Copyright 2015, 2016 OpenMarket Ltd
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2015-12-23 12:48:03 +01:00
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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 .. import unittest
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from synapse.util.caches.snapshot_cache import SnapshotCache
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from twisted.internet.defer import Deferred
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2016-02-19 16:34:38 +01:00
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2015-12-23 12:48:03 +01:00
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class SnapshotCacheTestCase(unittest.TestCase):
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def setUp(self):
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self.cache = SnapshotCache()
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self.cache.DURATION_MS = 1
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def test_get_set(self):
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# Check that getting a missing key returns None
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self.assertEquals(self.cache.get(0, "key"), None)
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# Check that setting a key with a deferred returns
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# a deferred that resolves when the initial deferred does
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d = Deferred()
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set_result = self.cache.set(0, "key", d)
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self.assertIsNotNone(set_result)
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self.assertFalse(set_result.called)
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# Check that getting the key before the deferred has resolved
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# returns a deferred that resolves when the initial deferred does.
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get_result_at_10 = self.cache.get(10, "key")
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self.assertIsNotNone(get_result_at_10)
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self.assertFalse(get_result_at_10.called)
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# Check that the returned deferreds resolve when the initial deferred
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# does.
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d.callback("v")
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self.assertTrue(set_result.called)
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self.assertTrue(get_result_at_10.called)
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# Check that getting the key after the deferred has resolved
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# before the cache expires returns a resolved deferred.
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get_result_at_11 = self.cache.get(11, "key")
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self.assertIsNotNone(get_result_at_11)
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self.assertTrue(get_result_at_11.called)
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# Check that getting the key after the deferred has resolved
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# after the cache expires returns None
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get_result_at_12 = self.cache.get(12, "key")
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self.assertIsNone(get_result_at_12)
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