def test_insert(self):
linkedList = LinkedList()
linkedList.insert(10)
linkedList.insert(12)
linkedList.insert(13)
self.assertEqual(linkedList.size(), 3)
def test_insert_and_remove(self):
linkedList = LinkedList()
linkedList.insert(10)
linkedList.remove(10)
self.assertEqual(linkedList.size(),0)
