def test_123(self):
input = [1, 2, 3]
linked_list = ListNode.build(input)
output = linked_list.to_list()
self.assertEqual(input, output)
def test_empty_input_array(self):
linked_list = ListNode.build([])
output = ListNode(None)
self.assertEqual(linked_list, output)
def test_empty_input_array_with_non_empty(self):
linked_list = ListNode.build([1, 2, 3])
output = ListNode(None)
self.assertNotEqual(linked_list, output)
def test_longer_inequality(self):
input = [1, 2, 'b', 8, 'xyz', 3.14]
linked_list = ListNode.build(input)
linked_list2 = ListNode.build(input[0:1])
self.assertNotEqual(linked_list, linked_list2)
def test_large(self):
input = [2**30, -30**5, 8**16, 100 * 1000000]
linked_list = ListNode.build(input)
output = linked_list.to_list()
self.assertEqual(input, output)
def test_string(self):
input = ['this', 'is', 'a', 'string', 'test']
linked_list = ListNode.build(input)
output = linked_list.to_list()
self.assertEqual(input, output)
def test_minus8634(self):
input = [-8, -9, -3, -4]
linked_list = ListNode.build(input)
output = linked_list.to_list()
self.assertEqual(input, output)
def test_is_circular_three_node_false(self):
head = ListNode.build([1, 2, 3])
self.assertFalse(head.is_circular())