public void peek_doesnt_change_limit()
        {
            var queue = new FixedSizeQueue <int>(testArray.Length, testArray);
            int limit = queue.Limit;

            queue.Peek();
            Assert.AreEqual(limit, queue.Limit);
        }
        public void peek_doesnt_change_size()
        {
            var queue = new FixedSizeQueue <int>(testArray.Length, testArray);
            int size  = queue.Count;

            queue.Peek();
            Assert.AreEqual(size, queue.Count);
        }
        public void peek_expected_value()
        {
            var queue = new FixedSizeQueue <int>(testArray.Length, testArray);

            Assert.AreEqual(queue.Peek(), testArray[0]);
        }