def test_7(self):
""" Check that length returns the size of queue """
q = Queue()
n1 = Node(1)
n2 = Node(2)
q.enqueue(n1)
q.enqueue(n2)
self.assertEqual(q.length(), 2)
def test_8(self):
""" Check that length returns 0 if no nodes """
q = Queue()
self.assertEqual(q.length(), 0)