public void TestArray()
        {
            int[] dataArray             = new int[] { 7, 1, 5, 3, 6, 4 };
            BestTimeToBuyAndSellStock c = new BestTimeToBuyAndSellStock();
            int profit = c.GetMaxProfit(dataArray);

            Assert.AreEqual(5, profit);
        }
        public void TestArrayWithTwoItem()
        {
            int[] dataArray             = new int[] { 1, 4 };
            BestTimeToBuyAndSellStock c = new BestTimeToBuyAndSellStock();
            int profit = c.GetMaxProfit(dataArray);

            Assert.AreEqual(3, profit);
        }