diff --git a/tests/storage/test_roommember.py b/tests/storage/test_roommember.py
index 240b02cb9f..ceec690285 100644
--- a/tests/storage/test_roommember.py
+++ b/tests/storage/test_roommember.py
@@ -23,6 +23,7 @@ from synapse.util import Clock
from tests import unittest
from tests.server import TestHomeServer
+from tests.test_utils import event_injection
class RoomMemberStoreTestCase(unittest.HomeserverTestCase):
@@ -157,6 +158,75 @@ class RoomMemberStoreTestCase(unittest.HomeserverTestCase):
# Check that alice's display name is now None
self.assertEqual(row[0]["display_name"], None)
+ def test_room_is_locally_forgotten(self):
+ """Test that when the last local user has forgotten a room it is known as forgotten."""
+ # join two local and one remote user
+ self.room = self.helper.create_room_as(self.u_alice, tok=self.t_alice)
+ self.get_success(
+ event_injection.inject_member_event(self.hs, self.room, self.u_bob, "join")
+ )
+ self.get_success(
+ event_injection.inject_member_event(
+ self.hs, self.room, self.u_charlie.to_string(), "join"
+ )
+ )
+ self.assertFalse(
+ self.get_success(self.store.is_locally_forgotten_room(self.room))
+ )
+
+ # local users leave the room and the room is not forgotten
+ self.get_success(
+ event_injection.inject_member_event(
+ self.hs, self.room, self.u_alice, "leave"
+ )
+ )
+ self.get_success(
+ event_injection.inject_member_event(self.hs, self.room, self.u_bob, "leave")
+ )
+ self.assertFalse(
+ self.get_success(self.store.is_locally_forgotten_room(self.room))
+ )
+
+ # first user forgets the room, room is not forgotten
+ self.get_success(self.store.forget(self.u_alice, self.room))
+ self.assertFalse(
+ self.get_success(self.store.is_locally_forgotten_room(self.room))
+ )
+
+ # second (last local) user forgets the room and the room is forgotten
+ self.get_success(self.store.forget(self.u_bob, self.room))
+ self.assertTrue(
+ self.get_success(self.store.is_locally_forgotten_room(self.room))
+ )
+
+ def test_join_locally_forgotten_room(self):
+ """Tests if a user joins a forgotten room the room is not forgotten anymore."""
+ self.room = self.helper.create_room_as(self.u_alice, tok=self.t_alice)
+ self.assertFalse(
+ self.get_success(self.store.is_locally_forgotten_room(self.room))
+ )
+
+ # after leaving and forget the room, it is forgotten
+ self.get_success(
+ event_injection.inject_member_event(
+ self.hs, self.room, self.u_alice, "leave"
+ )
+ )
+ self.get_success(self.store.forget(self.u_alice, self.room))
+ self.assertTrue(
+ self.get_success(self.store.is_locally_forgotten_room(self.room))
+ )
+
+ # after rejoin the room is not forgotten anymore
+ self.get_success(
+ event_injection.inject_member_event(
+ self.hs, self.room, self.u_alice, "join"
+ )
+ )
+ self.assertFalse(
+ self.get_success(self.store.is_locally_forgotten_room(self.room))
+ )
+
class CurrentStateMembershipUpdateTestCase(unittest.HomeserverTestCase):
def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
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