diff --git a/tests/replication/slave/storage/_base.py b/tests/replication/slave/storage/_base.py
new file mode 100644
index 0000000000..0f525a8943
--- /dev/null
+++ b/tests/replication/slave/storage/_base.py
@@ -0,0 +1,57 @@
+# Copyright 2016 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.replication.slave.storage.events import SlavedEventStore
+
+from mock import Mock, NonCallableMock
+from tests.utils import setup_test_homeserver
+from synapse.replication.resource import ReplicationResource
+
+
+class BaseSlavedStoreTestCase(unittest.TestCase):
+ @defer.inlineCallbacks
+ def setUp(self):
+ self.hs = yield setup_test_homeserver(
+ "blue",
+ http_client=None,
+ replication_layer=Mock(),
+ ratelimiter=NonCallableMock(spec_set=[
+ "send_message",
+ ]),
+ )
+ self.hs.get_ratelimiter().send_message.return_value = (True, 0)
+
+ self.replication = ReplicationResource(self.hs)
+
+ self.master_store = self.hs.get_datastore()
+ self.slaved_store = SlavedEventStore(self.hs.get_db_conn(), self.hs)
+ self.event_id = 0
+
+ @defer.inlineCallbacks
+ def replicate(self):
+ streams = self.slaved_store.stream_positions()
+ result = yield self.replication.replicate(streams, 100)
+ yield self.slaved_store.process_replication(result)
+
+ @defer.inlineCallbacks
+ def check(self, method, args, expected_result=None):
+ master_result = yield getattr(self.master_store, method)(*args)
+ slaved_result = yield getattr(self.slaved_store, method)(*args)
+ self.assertEqual(master_result, slaved_result)
+ if expected_result is not None:
+ self.assertEqual(master_result, expected_result)
+ self.assertEqual(slaved_result, expected_result)
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