1 files changed, 92 insertions, 0 deletions
diff --git a/tests/rest/admin/test_server_notice.py b/tests/rest/admin/test_server_notice.py
index a53463c9ba..dbcba2663c 100644
--- a/tests/rest/admin/test_server_notice.py
+++ b/tests/rest/admin/test_server_notice.py
@@ -409,6 +409,98 @@ class ServerNoticeTestCase(unittest.HomeserverTestCase):
         # second room has new ID
         self.assertNotEqual(first_room_id, second_room_id)
 
+    @override_config({"server_notices": {"system_mxid_localpart": "notices"}})
+    def test_update_notice_user_name_when_changed(self) -> None:
+        """
+        Tests that existing server notices user name in room is updated after
+        server notice config changes.
+        """
+        server_notice_request_content = {
+            "user_id": self.other_user,
+            "content": {"msgtype": "m.text", "body": "test msg one"},
+        }
+
+        self.make_request(
+            "POST",
+            self.url,
+            access_token=self.admin_user_tok,
+            content=server_notice_request_content,
+        )
+
+        # simulate a change in server config after a server restart.
+        new_display_name = "new display name"
+        self.server_notices_manager._config.servernotices.server_notices_mxid_display_name = (
+            new_display_name
+        )
+        self.server_notices_manager.get_or_create_notice_room_for_user.cache.invalidate_all()
+
+        self.make_request(
+            "POST",
+            self.url,
+            access_token=self.admin_user_tok,
+            content=server_notice_request_content,
+        )
+
+        invited_rooms = self._check_invite_and_join_status(self.other_user, 1, 0)
+        notice_room_id = invited_rooms[0].room_id
+        self.helper.join(
+            room=notice_room_id, user=self.other_user, tok=self.other_user_token
+        )
+
+        notice_user_state_in_room = self.helper.get_state(
+            notice_room_id,
+            "m.room.member",
+            self.other_user_token,
+            state_key="@notices:test",
+        )
+        self.assertEqual(notice_user_state_in_room["displayname"], new_display_name)
+
+    @override_config({"server_notices": {"system_mxid_localpart": "notices"}})
+    def test_update_notice_user_avatar_when_changed(self) -> None:
+        """
+        Tests that existing server notices user avatar in room is updated when is
+        different from the one in homeserver config.
+        """
+        server_notice_request_content = {
+            "user_id": self.other_user,
+            "content": {"msgtype": "m.text", "body": "test msg one"},
+        }
+
+        self.make_request(
+            "POST",
+            self.url,
+            access_token=self.admin_user_tok,
+            content=server_notice_request_content,
+        )
+
+        # simulate a change in server config after a server restart.
+        new_avatar_url = "test/new-url"
+        self.server_notices_manager._config.servernotices.server_notices_mxid_avatar_url = (
+            new_avatar_url
+        )
+        self.server_notices_manager.get_or_create_notice_room_for_user.cache.invalidate_all()
+
+        self.make_request(
+            "POST",
+            self.url,
+            access_token=self.admin_user_tok,
+            content=server_notice_request_content,
+        )
+
+        invited_rooms = self._check_invite_and_join_status(self.other_user, 1, 0)
+        notice_room_id = invited_rooms[0].room_id
+        self.helper.join(
+            room=notice_room_id, user=self.other_user, tok=self.other_user_token
+        )
+
+        notice_user_state = self.helper.get_state(
+            notice_room_id,
+            "m.room.member",
+            self.other_user_token,
+            state_key="@notices:test",
+        )
+        self.assertEqual(notice_user_state["avatar_url"], new_avatar_url)
+
     def _check_invite_and_join_status(
         self, user_id: str, expected_invites: int, expected_memberships: int
     ) -> List[RoomsForUser]: