def test_set_room_new_room(self) -> None:
"""Test manipulating rooms in system."""
room1 = Room(id='10')
room2 = Room(id='11')
room3 = Room(id='12')
system = System(rooms=[room1, room2])
system.set_room(room3.id, room3)
self.assertEqual(3, len(system.rooms))
def test_set_room_existing_room(self) -> None:
"""Test manipulating rooms in system."""
room1 = Room(id='10')
room2 = Room(id='11')
room3 = Room(id='11')
system = System(rooms=[room1, room2])
system.set_room(room3.id, room3)
self.assertEqual(2, len(system.rooms))
self.assertEqual(room3, system._rooms[room2.id])