public HttpResponseMessage GetOilPriceTrend(DateTime startDateISO8601, DateTime endDateISO8601)
        {
            OilPriceManager oilPriceManager = new OilPriceManager();

            var    l          = oilPriceManager.GetOilPriceTrend(startDateISO8601, endDateISO8601);
            string resultjson = JsonConvert.SerializeObject(
                new {
                prices = l
            }
                );

            return(Request.CreateResponse(HttpStatusCode.OK, resultjson));
        }
        public void OilPriceTrend()
        {
            bool res = false;

            try
            {
                DateTime startDateISO8601 = DateTimeOffset.Parse("2020-01-01T00:00").DateTime;

                DateTime endDateISO8601 = DateTimeOffset.Parse("2020-01-05T00:00").DateTime;

                OilPriceManager oilPriceManager = new OilPriceManager();

                var l = oilPriceManager.GetOilPriceTrend(startDateISO8601, endDateISO8601);
                res = true;
            }
            catch (Exception e) { }
            Assert.AreEqual(true, res);
        }