def test_person(self) -> None:
sut = PersonName('Janet', 'Not a Girl')
person = Person('1')
sut.person = person
self.assertEquals(person, sut.person)
self.assertCountEqual([sut], person.names)
sut.person = None
self.assertIsNone(sut.person)
self.assertCountEqual([], person.names)
def test_person_should_sync_references(self):
sut = PersonName('Janet', 'Not a Girl')
person = Person('1')
sut.person = person
self.assertEquals(person, sut.person)
self.assertCountEqual([sut], person.names)
sut.person = None
self.assertIsNone(sut.person)
self.assertCountEqual([], person.names)
