def test_case_index_default_relationship(self):
        case_index = CaseIndex(tag='mother')
        self.assertEqual(case_index.relationship, 'child')
CaseIndex relationship should default to "child"
dataset/ETHPy150Open dimagi/commcare-hq/corehq/apps/app_manager/tests/test_extension_case.py/CaseIndexTests.test_case_index_default_relationship