public void GetOpenOrderTest(string symbol, int pageIndex, int pageSize, string sortBy, int tradeType)
        {
            var    result = client.GetOpenOrderAsync(symbol, pageIndex, pageSize, sortBy, tradeType).Result;
            string strret = JsonConvert.SerializeObject(result, Formatting.Indented);

            Console.WriteLine(strret);
            Assert.Equal("ok", result.status);
        }