def test_interleaved(self): queue = ContrivedQueue() queue.enqueue('first') self.assertEqual('first', queue.dequeue()) queue.enqueue('second') queue.enqueue('third') self.assertEqual('second', queue.dequeue()) self.assertEqual('third', queue.dequeue())
def test_index_errors(self): queue = ContrivedQueue() with self.assertRaises(IndexError): queue.dequeue() queue.enqueue(5) queue.dequeue() with self.assertRaises(IndexError): queue.dequeue()