diff --git a/tests/rest/client/v1/test_rooms.py b/tests/rest/client/v1/test_rooms.py
index 1ca7fa742f..9cb505f316 100644
--- a/tests/rest/client/v1/test_rooms.py
+++ b/tests/rest/client/v1/test_rooms.py
@@ -29,6 +29,7 @@ import synapse.rest.admin
from synapse.api.constants import EventContentFields, EventTypes, Membership
from synapse.handlers.pagination import PurgeStatus
from synapse.rest.client.v1 import login, profile, room
+from synapse.rest.client.v2_alpha import account
from synapse.util.stringutils import random_string
from tests import unittest
@@ -1597,3 +1598,135 @@ class LabelsTestCase(unittest.HomeserverTestCase):
)
return event_id
+
+
+class ContextTestCase(unittest.HomeserverTestCase):
+
+ servlets = [
+ synapse.rest.admin.register_servlets_for_client_rest_resource,
+ room.register_servlets,
+ login.register_servlets,
+ account.register_servlets,
+ ]
+
+ def make_homeserver(self, reactor, clock):
+ self.hs = self.setup_test_homeserver()
+
+ return self.hs
+
+ def prepare(self, reactor, clock, homeserver):
+ self.user_id = self.register_user("user", "password")
+ self.tok = self.login("user", "password")
+ self.room_id = self.helper.create_room_as(self.user_id, tok=self.tok)
+
+ self.other_user_id = self.register_user("user2", "password")
+ self.other_tok = self.login("user2", "password")
+
+ self.helper.invite(self.room_id, self.user_id, self.other_user_id, tok=self.tok)
+ self.helper.join(self.room_id, self.other_user_id, tok=self.other_tok)
+
+ def test_erased_sender(self):
+ """Test that an erasure request results in the requester's events being hidden
+ from any new member of the room.
+ """
+
+ # Send a bunch of events in the room.
+
+ self.helper.send(self.room_id, "message 1", tok=self.tok)
+ self.helper.send(self.room_id, "message 2", tok=self.tok)
+ event_id = self.helper.send(self.room_id, "message 3", tok=self.tok)["event_id"]
+ self.helper.send(self.room_id, "message 4", tok=self.tok)
+ self.helper.send(self.room_id, "message 5", tok=self.tok)
+
+ # Check that we can still see the messages before the erasure request.
+
+ request, channel = self.make_request(
+ "GET",
+ '/rooms/%s/context/%s?filter={"types":["m.room.message"]}'
+ % (self.room_id, event_id),
+ access_token=self.tok,
+ )
+ self.render(request)
+ self.assertEqual(channel.code, 200, channel.result)
+
+ events_before = channel.json_body["events_before"]
+
+ self.assertEqual(len(events_before), 2, events_before)
+ self.assertEqual(
+ events_before[0].get("content", {}).get("body"),
+ "message 2",
+ events_before[0],
+ )
+ self.assertEqual(
+ events_before[1].get("content", {}).get("body"),
+ "message 1",
+ events_before[1],
+ )
+
+ self.assertEqual(
+ channel.json_body["event"].get("content", {}).get("body"),
+ "message 3",
+ channel.json_body["event"],
+ )
+
+ events_after = channel.json_body["events_after"]
+
+ self.assertEqual(len(events_after), 2, events_after)
+ self.assertEqual(
+ events_after[0].get("content", {}).get("body"),
+ "message 4",
+ events_after[0],
+ )
+ self.assertEqual(
+ events_after[1].get("content", {}).get("body"),
+ "message 5",
+ events_after[1],
+ )
+
+ # Deactivate the first account and erase the user's data.
+
+ deactivate_account_handler = self.hs.get_deactivate_account_handler()
+ self.get_success(
+ deactivate_account_handler.deactivate_account(self.user_id, erase_data=True)
+ )
+
+ # Invite another user in the room. This is needed because messages will be
+ # pruned only if the user wasn't a member of the room when the messages were
+ # sent.
+
+ invited_user_id = self.register_user("user3", "password")
+ invited_tok = self.login("user3", "password")
+
+ self.helper.invite(
+ self.room_id, self.other_user_id, invited_user_id, tok=self.other_tok
+ )
+ self.helper.join(self.room_id, invited_user_id, tok=invited_tok)
+
+ # Check that a user that joined the room after the erasure request can't see
+ # the messages anymore.
+
+ request, channel = self.make_request(
+ 'GET',
+ '/rooms/%s/context/%s?filter={"types":["m.room.message"]}'
+ % (self.room_id, event_id),
+ access_token=invited_tok,
+ )
+ self.render(request)
+ self.assertEqual(channel.code, 200, channel.result)
+
+ events_before = channel.json_body["events_before"]
+
+ self.assertEqual(len(events_before), 2, events_before)
+ self.assertDictEqual(events_before[0].get("content"), {}, events_before[0])
+ self.assertDictEqual(events_before[1].get("content"), {}, events_before[1])
+
+ self.assertDictEqual(
+ channel.json_body["event"].get("content"), {}, channel.json_body["event"]
+ )
+
+ events_after = channel.json_body["events_after"]
+
+ self.assertEqual(len(events_after), 2, events_after)
+ self.assertDictEqual(events_after[0].get("content"), {}, events_after[0])
+ self.assertEqual(events_after[1].get("content"), {}, events_after[1])
+
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