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authorMark Haines <mark.haines@matrix.org>2015-12-23 11:48:03 +0000
committerMark Haines <mark.haines@matrix.org>2015-12-23 11:48:03 +0000
commit7fa71e32670aa0ed2b49d04fd3c66a72e8fbc1cf (patch)
tree4dfce06d1cba69874edb0475c9102892e28723fb /tests/util/test_snapshot_cache.py
parentMove the doc string to the public facing method (diff)
downloadsynapse-7fa71e32670aa0ed2b49d04fd3c66a72e8fbc1cf.tar.xz
Add a unit test for the snapshot cache
Diffstat (limited to 'tests/util/test_snapshot_cache.py')
-rw-r--r--tests/util/test_snapshot_cache.py60
1 files changed, 60 insertions, 0 deletions
diff --git a/tests/util/test_snapshot_cache.py b/tests/util/test_snapshot_cache.py
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+++ b/tests/util/test_snapshot_cache.py
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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 .. import unittest
+
+from synapse.util.caches.snapshot_cache import SnapshotCache
+from twisted.internet.defer import Deferred
+
+class SnapshotCacheTestCase(unittest.TestCase):
+
+    def setUp(self):
+        self.cache = SnapshotCache()
+        self.cache.DURATION_MS = 1
+
+    def test_get_set(self):
+        # Check that getting a missing key returns None
+        self.assertEquals(self.cache.get(0, "key"), None)
+
+        # Check that setting a key with a deferred returns
+        # a deferred that resolves when the initial deferred does
+        d = Deferred()
+        set_result = self.cache.set(0, "key", d)
+        self.assertIsNotNone(set_result)
+        self.assertFalse(set_result.called)
+
+        # Check that getting the key before the deferred has resolved
+        # returns a deferred that resolves when the initial deferred does.
+        get_result_at_10 = self.cache.get(10, "key")
+        self.assertIsNotNone(get_result_at_10)
+        self.assertFalse(get_result_at_10.called)
+
+        # Check that the returned deferreds resolve when the initial deferred
+        # does.
+        d.callback("v")
+        self.assertTrue(set_result.called)
+        self.assertTrue(get_result_at_10.called)
+
+        # Check that getting the key after the deferred has resolved
+        # before the cache expires returns a resolved deferred.
+        get_result_at_11 = self.cache.get(11, "key")
+        self.assertIsNotNone(get_result_at_11)
+        self.assertTrue(get_result_at_11.called)
+
+        # Check that getting the key after the deferred has resolved
+        # after the cache expires returns None
+        get_result_at_12 = self.cache.get(12, "key")
+        self.assertIsNone(get_result_at_12)