public void Test1()
        {
            int[] data = new int[5] {
                1, 2, 3, 4, 5
            };

            int[] actual = LeftRotation.RotLeft(data, 4);

            Assert.Equal(new int[5] {
                5, 1, 2, 3, 4
            }, actual);
        }
        public void Test3()
        {
            int[] data = new int[6] {
                1, 2, 3, 4, 5, 6
            };

            int[] actual = LeftRotation.RotLeft(data, 3);

            Assert.Equal(new int[6] {
                4, 5, 6, 1, 2, 3
            }, actual);
        }