def test_get_siblings(self):
member = Member(5, "Dummy", "Male")
mother = Member(9, "Mother", "Female")
son = Member(7, "Son", "Male")
daughter = Member(7, "Daughter", "Female")
self.assertEqual(member.get_siblings(), [])
member.mother = mother
self.assertEqual(member.get_siblings(), [])
mother.children.extend([member, son, daughter])
member.mother = mother
siblings = member.get_siblings()
self.assertEqual(len(siblings), 2)
def test_get_maternal_grandmother(self):
member = Member(9, "Newmember", "Male")
mother = Member(10, "Newmember_mother", "Female")
grandmother = Member(11, "Newmember_grandmother", "Female")
# error cases
self.assertEqual(member.get_paternal_grandmother(), None)
member.mother = mother
self.assertEqual(member.get_paternal_grandmother(), None)
member.mother.mother = grandmother
self.assertEqual(member.get_maternal_grandmother(), grandmother)