diff --git a/tests/replication/tcp/__init__.py b/tests/replication/tcp/__init__.py
new file mode 100644
index 0000000000..1453d04571
--- /dev/null
+++ b/tests/replication/tcp/__init__.py
@@ -0,0 +1,14 @@
+# -*- coding: utf-8 -*-
+# Copyright 2019 New Vector 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.
diff --git a/tests/replication/tcp/streams/__init__.py b/tests/replication/tcp/streams/__init__.py
new file mode 100644
index 0000000000..1453d04571
--- /dev/null
+++ b/tests/replication/tcp/streams/__init__.py
@@ -0,0 +1,14 @@
+# -*- coding: utf-8 -*-
+# Copyright 2019 New Vector 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.
diff --git a/tests/replication/tcp/streams/_base.py b/tests/replication/tcp/streams/_base.py
new file mode 100644
index 0000000000..38b368a972
--- /dev/null
+++ b/tests/replication/tcp/streams/_base.py
@@ -0,0 +1,74 @@
+# -*- coding: utf-8 -*-
+# Copyright 2019 New Vector 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 synapse.replication.tcp.commands import ReplicateCommand
+from synapse.replication.tcp.protocol import ClientReplicationStreamProtocol
+from synapse.replication.tcp.resource import ReplicationStreamProtocolFactory
+
+from tests import unittest
+from tests.server import FakeTransport
+
+
+class BaseStreamTestCase(unittest.HomeserverTestCase):
+ """Base class for tests of the replication streams"""
+ def prepare(self, reactor, clock, hs):
+ # build a replication server
+ server_factory = ReplicationStreamProtocolFactory(self.hs)
+ self.streamer = server_factory.streamer
+ server = server_factory.buildProtocol(None)
+
+ # build a replication client, with a dummy handler
+ self.test_handler = TestReplicationClientHandler()
+ self.client = ClientReplicationStreamProtocol(
+ "client", "test", clock, self.test_handler
+ )
+
+ # wire them together
+ self.client.makeConnection(FakeTransport(server, reactor))
+ server.makeConnection(FakeTransport(self.client, reactor))
+
+ def replicate(self):
+ """Tell the master side of replication that something has happened, and then
+ wait for the replication to occur.
+ """
+ self.streamer.on_notifier_poke()
+ self.pump(0.1)
+
+ def replicate_stream(self, stream, token="NOW"):
+ """Make the client end a REPLICATE command to set up a subscription to a stream"""
+ self.client.send_command(ReplicateCommand(stream, token))
+
+
+class TestReplicationClientHandler(object):
+ """Drop-in for ReplicationClientHandler which just collects RDATA rows"""
+ def __init__(self):
+ self.received_rdata_rows = []
+
+ def get_streams_to_replicate(self):
+ return {}
+
+ def get_currently_syncing_users(self):
+ return []
+
+ def update_connection(self, connection):
+ pass
+
+ def finished_connecting(self):
+ pass
+
+ def on_rdata(self, stream_name, token, rows):
+ for r in rows:
+ self.received_rdata_rows.append(
+ (stream_name, token, r)
+ )
diff --git a/tests/replication/tcp/streams/test_receipts.py b/tests/replication/tcp/streams/test_receipts.py
new file mode 100644
index 0000000000..9aa9dfe82e
--- /dev/null
+++ b/tests/replication/tcp/streams/test_receipts.py
@@ -0,0 +1,46 @@
+# -*- coding: utf-8 -*-
+# Copyright 2019 New Vector 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 synapse.replication.tcp.streams import ReceiptsStreamRow
+
+from tests.replication.tcp.streams._base import BaseStreamTestCase
+
+USER_ID = "@feeling:blue"
+ROOM_ID = "!room:blue"
+EVENT_ID = "$event:blue"
+
+
+class ReceiptsStreamTestCase(BaseStreamTestCase):
+ def test_receipt(self):
+ # make the client subscribe to the receipts stream
+ self.replicate_stream("receipts", "NOW")
+
+ # tell the master to send a new receipt
+ self.get_success(
+ self.hs.get_datastore().insert_receipt(
+ ROOM_ID, "m.read", USER_ID, [EVENT_ID], {"a": 1}
+ )
+ )
+ self.replicate()
+
+ # there should be one RDATA command
+ rdata_rows = self.test_handler.received_rdata_rows
+ self.assertEqual(1, len(rdata_rows))
+ self.assertEqual(rdata_rows[0][0], "receipts")
+ row = rdata_rows[0][2] # type: ReceiptsStreamRow
+ self.assertEqual(ROOM_ID, row.room_id)
+ self.assertEqual("m.read", row.receipt_type)
+ self.assertEqual(USER_ID, row.user_id)
+ self.assertEqual(EVENT_ID, row.event_id)
+ self.assertEqual({"a": 1}, row.data)
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