public void BuyTradeRecordTest()
{
var stockCommon = new CommonStock {
symbol = "POP", lastDividend = 8, parValue = 100
};
exchangeStock.AddStock(stockCommon);
exchangeStock.BuyStock(stockCommon.symbol, 10, 3);
exchangeStock.SellStock(stockCommon.symbol, 5, 5);
exchangeStock.BuyStock(stockCommon.symbol, 5, 2);
var currentBuyTrades = exchangeStock.tradeList.Where(trade => trade.direction.Equals(TradeDirection.BUY)).ToList().Count;
var expectedBuyTrades = 2;
Assert.AreEqual(expectedBuyTrades, currentBuyTrades);
}