def test_mutating_nested_container_attribute_does_not_persist(self):
nca = t2.NestedContainerAttributes()
nca.int_set_vector.append({1})
self.assertEqual(nca.int_set_vector, [])
def test_setting_nested_container_attribute_overwrites(self):
nca = t2.NestedContainerAttributes()
nca.int_set_vector = [{1}, {2}, {3}]
nca.int_set_vector = [{4}]
self.assertEqual(nca.int_set_vector, [{4}])