diff --git a/tests/handlers/test_admin.py b/tests/handlers/test_admin.py
new file mode 100644
index 0000000000..fc37c4328c
--- /dev/null
+++ b/tests/handlers/test_admin.py
@@ -0,0 +1,210 @@
+# -*- coding: utf-8 -*-
+# Copyright 2019 The Matrix.org Foundation C.I.C.
+#
+# 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 collections import Counter
+
+from mock import Mock
+
+import synapse.api.errors
+import synapse.handlers.admin
+import synapse.rest.admin
+import synapse.storage
+from synapse.api.constants import EventTypes
+from synapse.rest.client.v1 import login, room
+
+from tests import unittest
+
+
+class ExfiltrateData(unittest.HomeserverTestCase):
+ servlets = [
+ synapse.rest.admin.register_servlets_for_client_rest_resource,
+ login.register_servlets,
+ room.register_servlets,
+ ]
+
+ def prepare(self, reactor, clock, hs):
+ self.admin_handler = hs.get_handlers().admin_handler
+
+ self.user1 = self.register_user("user1", "password")
+ self.token1 = self.login("user1", "password")
+
+ self.user2 = self.register_user("user2", "password")
+ self.token2 = self.login("user2", "password")
+
+ def test_single_public_joined_room(self):
+ """Test that we write *all* events for a public room
+ """
+ room_id = self.helper.create_room_as(
+ self.user1, tok=self.token1, is_public=True
+ )
+ self.helper.send(room_id, body="Hello!", tok=self.token1)
+ self.helper.join(room_id, self.user2, tok=self.token2)
+ self.helper.send(room_id, body="Hello again!", tok=self.token1)
+
+ writer = Mock()
+
+ self.get_success(self.admin_handler.export_user_data(self.user2, writer))
+
+ writer.write_events.assert_called()
+
+ # Since we can see all events there shouldn't be any extremities, so no
+ # state should be written
+ writer.write_state.assert_not_called()
+
+ # Collect all events that were written
+ written_events = []
+ for (called_room_id, events), _ in writer.write_events.call_args_list:
+ self.assertEqual(called_room_id, room_id)
+ written_events.extend(events)
+
+ # Check that the right number of events were written
+ counter = Counter(
+ (event.type, getattr(event, "state_key", None)) for event in written_events
+ )
+ self.assertEqual(counter[(EventTypes.Message, None)], 2)
+ self.assertEqual(counter[(EventTypes.Member, self.user1)], 1)
+ self.assertEqual(counter[(EventTypes.Member, self.user2)], 1)
+
+ def test_single_private_joined_room(self):
+ """Tests that we correctly write state when we can't see all events in
+ a room.
+ """
+ room_id = self.helper.create_room_as(self.user1, tok=self.token1)
+ self.helper.send_state(
+ room_id,
+ EventTypes.RoomHistoryVisibility,
+ body={"history_visibility": "joined"},
+ tok=self.token1,
+ )
+ self.helper.send(room_id, body="Hello!", tok=self.token1)
+ self.helper.join(room_id, self.user2, tok=self.token2)
+ self.helper.send(room_id, body="Hello again!", tok=self.token1)
+
+ writer = Mock()
+
+ self.get_success(self.admin_handler.export_user_data(self.user2, writer))
+
+ writer.write_events.assert_called()
+
+ # Since we can't see all events there should be one extremity.
+ writer.write_state.assert_called_once()
+
+ # Collect all events that were written
+ written_events = []
+ for (called_room_id, events), _ in writer.write_events.call_args_list:
+ self.assertEqual(called_room_id, room_id)
+ written_events.extend(events)
+
+ # Check that the right number of events were written
+ counter = Counter(
+ (event.type, getattr(event, "state_key", None)) for event in written_events
+ )
+ self.assertEqual(counter[(EventTypes.Message, None)], 1)
+ self.assertEqual(counter[(EventTypes.Member, self.user1)], 1)
+ self.assertEqual(counter[(EventTypes.Member, self.user2)], 1)
+
+ def test_single_left_room(self):
+ """Tests that we don't see events in the room after we leave.
+ """
+ room_id = self.helper.create_room_as(self.user1, tok=self.token1)
+ self.helper.send(room_id, body="Hello!", tok=self.token1)
+ self.helper.join(room_id, self.user2, tok=self.token2)
+ self.helper.send(room_id, body="Hello again!", tok=self.token1)
+ self.helper.leave(room_id, self.user2, tok=self.token2)
+ self.helper.send(room_id, body="Helloooooo!", tok=self.token1)
+
+ writer = Mock()
+
+ self.get_success(self.admin_handler.export_user_data(self.user2, writer))
+
+ writer.write_events.assert_called()
+
+ # Since we can see all events there shouldn't be any extremities, so no
+ # state should be written
+ writer.write_state.assert_not_called()
+
+ written_events = []
+ for (called_room_id, events), _ in writer.write_events.call_args_list:
+ self.assertEqual(called_room_id, room_id)
+ written_events.extend(events)
+
+ # Check that the right number of events were written
+ counter = Counter(
+ (event.type, getattr(event, "state_key", None)) for event in written_events
+ )
+ self.assertEqual(counter[(EventTypes.Message, None)], 2)
+ self.assertEqual(counter[(EventTypes.Member, self.user1)], 1)
+ self.assertEqual(counter[(EventTypes.Member, self.user2)], 2)
+
+ def test_single_left_rejoined_private_room(self):
+ """Tests that see the correct events in private rooms when we
+ repeatedly join and leave.
+ """
+ room_id = self.helper.create_room_as(self.user1, tok=self.token1)
+ self.helper.send_state(
+ room_id,
+ EventTypes.RoomHistoryVisibility,
+ body={"history_visibility": "joined"},
+ tok=self.token1,
+ )
+ self.helper.send(room_id, body="Hello!", tok=self.token1)
+ self.helper.join(room_id, self.user2, tok=self.token2)
+ self.helper.send(room_id, body="Hello again!", tok=self.token1)
+ self.helper.leave(room_id, self.user2, tok=self.token2)
+ self.helper.send(room_id, body="Helloooooo!", tok=self.token1)
+ self.helper.join(room_id, self.user2, tok=self.token2)
+ self.helper.send(room_id, body="Helloooooo!!", tok=self.token1)
+
+ writer = Mock()
+
+ self.get_success(self.admin_handler.export_user_data(self.user2, writer))
+
+ writer.write_events.assert_called_once()
+
+ # Since we joined/left/joined again we expect there to be two gaps.
+ self.assertEqual(writer.write_state.call_count, 2)
+
+ written_events = []
+ for (called_room_id, events), _ in writer.write_events.call_args_list:
+ self.assertEqual(called_room_id, room_id)
+ written_events.extend(events)
+
+ # Check that the right number of events were written
+ counter = Counter(
+ (event.type, getattr(event, "state_key", None)) for event in written_events
+ )
+ self.assertEqual(counter[(EventTypes.Message, None)], 2)
+ self.assertEqual(counter[(EventTypes.Member, self.user1)], 1)
+ self.assertEqual(counter[(EventTypes.Member, self.user2)], 3)
+
+ def test_invite(self):
+ """Tests that pending invites get handled correctly.
+ """
+ room_id = self.helper.create_room_as(self.user1, tok=self.token1)
+ self.helper.send(room_id, body="Hello!", tok=self.token1)
+ self.helper.invite(room_id, self.user1, self.user2, tok=self.token1)
+
+ writer = Mock()
+
+ self.get_success(self.admin_handler.export_user_data(self.user2, writer))
+
+ writer.write_events.assert_not_called()
+ writer.write_state.assert_not_called()
+ writer.write_invite.assert_called_once()
+
+ args = writer.write_invite.call_args[0]
+ self.assertEqual(args[0], room_id)
+ self.assertEqual(args[1].content["membership"], "invite")
+ self.assertTrue(args[2]) # Assert there is at least one bit of state
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