public void QueueSchedulerPushPollSynchronized()
        {
            QueueDuplicateRemovedScheduler scheduler = new QueueDuplicateRemovedScheduler();
            ISpider spider = new DefaultSpider("test", new Site());

            Parallel.For(0, 1000, new ParallelOptions() { MaxDegreeOfParallelism = 30 }, i =>
            {
                scheduler.Push(new Request("http://www.a.com", 1, null));
                scheduler.Push(new Request("http://www.a.com", 1, null));
                scheduler.Push(new Request("http://www.a.com", 1, null));

                scheduler.Push(new Request("http://www.b.com", 1, null));

                scheduler.Push(new Request($"http://www.{i.ToString()}.com", 1, null));
            });

            Parallel.For(0, 1000, new ParallelOptions() { MaxDegreeOfParallelism = 30 }, i =>
            {
                scheduler.Poll();
            });

            long left = scheduler.GetLeftRequestsCount();
            long total = scheduler.GetTotalRequestsCount();

            Assert.AreEqual(left, 2);
            Assert.AreEqual(total, 1002);
        }
        public void QueueSchedulerPoll()
        {
            QueueDuplicateRemovedScheduler scheduler = new QueueDuplicateRemovedScheduler();
            ISpider spider = new DefaultSpider("test", new Site());
            scheduler.Push(new Request("http://www.a.com", 1, null));
            scheduler.Push(new Request("http://www.a.com", 1, null));
            scheduler.Push(new Request("http://www.a.com", 1, null));

            scheduler.Push(new Request("http://www.b.com", 1, null));

            var request = scheduler.Poll();
            Assert.AreEqual(request.Url, "http://www.a.com");

            long left = scheduler.GetLeftRequestsCount();
            long total = scheduler.GetTotalRequestsCount();

            Assert.AreEqual(left, 1);
            Assert.AreEqual(total, 2);
        }