public void EnqueueClearTest()
        {
            var queue = new QueueFifoConcurrent <int>(limit: 3, QueueOption.None);

            queue.Enqueue(1);
            queue.Enqueue(1);
            queue.Enqueue(1);
            queue.Count.ShouldBe(3);
            queue.Clear();
            queue.Count.ShouldBe(0);
        }