def test_delete_node(self):
"""
Tests that a Node can delete itself
"""
node = Node(1)
node.insert_after(2)
next = node.next
node.insert_before(5)
prev = node.prev
node.delete()
self.assertEqual(next.prev.value, 5)
self.assertEqual(prev.next.value, 2)
def test_node_delete(self):
node_1 = Node(3)
node_2 = Node(4)
node_3 = Node(5)
node_1.next = node_2
node_2.next = node_3
node_2.prev = node_1
node_3.prev = node_2
node_2.delete()
self.assertEqual(node_1.next, node_3)
self.assertEqual(node_3.prev, node_1)
