diff --git a/tests/util/test_dict_cache.py b/tests/util/test_dict_cache.py
new file mode 100644
index 0000000000..54ff26cd97
--- /dev/null
+++ b/tests/util/test_dict_cache.py
@@ -0,0 +1,101 @@
+# -*- 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 twisted.internet import defer
+from tests import unittest
+
+from synapse.util.caches.dictionary_cache import DictionaryCache
+
+
+class DictCacheTestCase(unittest.TestCase):
+
+ def setUp(self):
+ self.cache = DictionaryCache("foobar")
+
+ def test_simple_cache_hit_full(self):
+ key = "test_simple_cache_hit_full"
+
+ v = self.cache.get(key)
+ self.assertEqual((False, {}), v)
+
+ seq = self.cache.sequence
+ test_value = {"test": "test_simple_cache_hit_full"}
+ self.cache.update(seq, key, test_value, full=True)
+
+ c = self.cache.get(key)
+ self.assertEqual(test_value, c.value)
+
+ def test_simple_cache_hit_partial(self):
+ key = "test_simple_cache_hit_partial"
+
+ seq = self.cache.sequence
+ test_value = {
+ "test": "test_simple_cache_hit_partial"
+ }
+ self.cache.update(seq, key, test_value, full=True)
+
+ c = self.cache.get(key, ["test"])
+ self.assertEqual(test_value, c.value)
+
+ def test_simple_cache_miss_partial(self):
+ key = "test_simple_cache_miss_partial"
+
+ seq = self.cache.sequence
+ test_value = {
+ "test": "test_simple_cache_miss_partial"
+ }
+ self.cache.update(seq, key, test_value, full=True)
+
+ c = self.cache.get(key, ["test2"])
+ self.assertEqual({}, c.value)
+
+ def test_simple_cache_hit_miss_partial(self):
+ key = "test_simple_cache_hit_miss_partial"
+
+ seq = self.cache.sequence
+ test_value = {
+ "test": "test_simple_cache_hit_miss_partial",
+ "test2": "test_simple_cache_hit_miss_partial2",
+ "test3": "test_simple_cache_hit_miss_partial3",
+ }
+ self.cache.update(seq, key, test_value, full=True)
+
+ c = self.cache.get(key, ["test2"])
+ self.assertEqual({"test2": "test_simple_cache_hit_miss_partial2"}, c.value)
+
+ def test_multi_insert(self):
+ key = "test_simple_cache_hit_miss_partial"
+
+ seq = self.cache.sequence
+ test_value_1 = {
+ "test": "test_simple_cache_hit_miss_partial",
+ }
+ self.cache.update(seq, key, test_value_1, full=False)
+
+ seq = self.cache.sequence
+ test_value_2 = {
+ "test2": "test_simple_cache_hit_miss_partial2",
+ }
+ self.cache.update(seq, key, test_value_2, full=False)
+
+ c = self.cache.get(key)
+ self.assertEqual(
+ {
+ "test": "test_simple_cache_hit_miss_partial",
+ "test2": "test_simple_cache_hit_miss_partial2",
+ },
+ c.value
+ )
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