public void MarketData_CanLoad()
        {
            IMarketDataRepository marketDataRepo = new MarketDataRepository(@"market.csv");

            var market = marketDataRepo.GetMarketData();

            Assert.AreEqual(7, market.Count());
        }
        public void MarketData_FileNotFound()
        {
            IMarketDataRepository marketDataRepo = new MarketDataRepository(@"missingfile.csv");

            var market = marketDataRepo.GetMarketData();
        }