def test_delete(self):
cll = CircleLinkedList()
cll.add(12)
cll.add(99)
cll.add(37)
cll.add(66)
cll.add(44)
cll.delete(37)
self.assertEqual([12, 99], cll.traverse())
self.assertEqual([66, 44], cll.traverse(66))
self.assertEqual([99, 12], cll.traverse_back())
self.assertEqual([44, 66], cll.traverse_back(44))
self.assertEqual([12, 99, 66, 44], cll.get_link_values())
self.assertEqual(4, cll.count_links())
def test_traverse_back(self):
cll = CircleLinkedList()
cll.add(12)
cll.add(99)
cll.add(37)
self.assertEqual([37, 99, 12], cll.traverse_back())
self.assertEqual(3, cll.count_links())
def test_traverse_back_from(self):
cll = CircleLinkedList()
cll.add(12)
cll.add(99)
cll.add(37)
cll.add(66)
cll.add(44)
self.assertEqual([66, 37, 99, 12], cll.traverse_back(66))
self.assertEqual(5, cll.count_links())
def test_update(self):
cll = CircleLinkedList()
cll.add(12)
cll.add(99)
cll.add(37)
cll.add(66)
cll.update(99, 88)
traverse_expected = [12, 88, 37, 66]
self.assertEqual(traverse_expected, cll.traverse())
traverse_expected.reverse()
self.assertEqual(traverse_expected, cll.traverse_back())
# items_expected = [12, 37, 66, 88]
# self.assertEqual(items_expected, cll.get_link_values())
self.assertEqual(4, cll.count_links())