def test_no_to_list_when_circular(self): head = ListNode.build_circular([i for i in range(21)]) self.assertFalse(head.to_list())
def test_is_circular_true(self): head = ListNode.build_circular([i for i in range(666)]) self.assertTrue(head.is_circular())
def test_is_circular_three_node_true(self): head = ListNode.build_circular([1, 2, 3]) self.assertTrue(head.is_circular())