public void PancakeSort_1()
        {
            var solution = new _0969_PancakeSorting();
            var result   = solution.PancakeSort(new int[] { 3, 2, 4, 1 });

            AssertHelper.AssertList(new int[] { 3, 4, 2, 3, 1, 2 }, result);
        }
        public void PancakeSort_2()
        {
            var solution = new _0969_PancakeSorting();
            var result   = solution.PancakeSort(new int[] { 1, 2, 3 });

            Assert.AreEqual(0, result.Count);
        }