def setUp(self): self.ls = LinkedList2() self.node_1 = Node(1) self.node_2 = Node(2) self.node_3 = Node(3) self.ls.add_in_tail(self.node_2) self.ls.add_in_tail(self.node_3)
def test_add_in_head_of_empty_list(self): self.ls = LinkedList2() self.ls.add_in_head(self.node_1) self.assertEqual(self.ls.head, self.node_1) self.assertIsNone(self.ls.head.prev) self.assertIsNone(self.ls.head.next) self.assertEqual(self.ls.tail, self.node_1) self.assertIsNone(self.ls.tail.next)
def test_add_in_head_of_list_with_single_element(self): self.ls = LinkedList2() self.ls.add_in_tail(self.node_2) self.ls.add_in_head(self.node_1) self.assertEqual(self.ls.head, self.node_1) self.assertEqual(self.ls.tail, self.node_2) self.assertEqual(self.ls.head.next, self.node_2) self.assertEqual(self.ls.tail.prev, self.node_1) self.assertIsNone(self.ls.head.prev) self.assertIsNone(self.ls.tail.next)
def test_delete_first_middle_last_values(self): self.ls = LinkedList2() node_1_1 = Node(1) node_1_2 = Node(1) node_1_3 = Node(1) node_2 = Node(2) node_3 = Node(3) self.ls.add_in_tail(node_1_1) self.ls.add_in_tail(node_2) self.ls.add_in_tail(node_1_2) self.ls.add_in_tail(node_3) self.ls.add_in_tail(node_1_3) self.ls.delete(1, True) self.assertEqual(self.ls.head, node_2) self.assertIsNone(self.ls.head.prev) self.assertEqual(self.ls.head.next, node_3) self.assertEqual(node_3.prev, node_2) self.assertEqual(self.ls.tail, node_3) self.assertIsNone(self.ls.tail.next)
def setUp(self): self.ls = LinkedList2() self.node_1 = Node(1) self.node_2 = Node(2) self.node_3 = Node(3)
def test_length_of_empty_list(self): self.ls = LinkedList2() length = self.ls.len() self.assertEqual(length, 0)
def test_clean_empty_list(self): self.ls = LinkedList2() self.ls.clean() self.assertIsNone(self.ls.head) self.assertIsNone(self.ls.tail)