public static void Main(string[] args)
{
StartUp();
Console.WriteLine("Buy low, sell high!");
Console.WriteLine("Enter the stock price source:");
var source = "";
while (source.Length == 0 && !File.Exists(source))
{
source = Console.ReadLine();
if (!File.Exists(source))
{
Console.WriteLine("Please enter a valid source:");
}
}
var sourceOps = new SourceOperations();
var stockPrices = sourceOps.GetStockPrices(source);
var stockPriceOps = new StockPriceOperations();
var bestTrade = stockPriceOps.GetBestTrade(stockPrices);
if (bestTrade == null)
{
Console.WriteLine("ERROR: unable to calculate the best trade for the given stock prices!");
}
else
{
Console.WriteLine(bestTrade.ToString());
}
}
public void TestGetStockPrices_NullSource_ThrowsArgumentNullException()
{
Assert.Throws <ArgumentNullException>(() => _sourceOperations.GetStockPrices(null));
}