def test_get_index(self):
linked_list = LinkedList()
langs = ['python', 'java', 'ruby', 'php', 'go']
for lang in langs:
linked_list.add_last(lang)
self.assertEqual(len(langs), linked_list.size())
self.assertEqual(langs[3], linked_list.get_index(3).item)
def test_add_two_elements_to_end_of_linked_list(self):
linked_list = LinkedList()
linked_list.add_last('python')
linked_list.add_last('ruby')
self.assertEqual('python', linked_list.get_first().item)
self.assertEqual('ruby', linked_list.get_last().item)
self.assertEqual(2, linked_list.size())
def test_add_five_elements_to_end_and_iterate_linked_list(self):
linked_list = LinkedList()
langs = ['python', 'java', 'ruby', 'php', 'go']
for lang in langs:
linked_list.add_last(lang)
self.assertEqual(len(langs), linked_list.size())
for node in linked_list:
self.assertIn(node.item, langs)
