public void Test_open_should_return_total_stocks_quantity()
{
StockHistory history = new StockHistory();
Quote quote = new Quote(2, 4);
Broker broker = new Broker(50);
Investment investment = new Investment(history, broker);
DateTime openDate = new DateTime(2020, 2, 10);
DateTime closeDate = new DateTime(2020, 4, 10);
DateTime februaryBuyDate = new DateTime(2020, 2, 28);
DateTime marchBuyDate = new DateTime(2020, 3, 27);
double stocksQuantity = 10;
double amount = 20;
history.Add(februaryBuyDate, quote);
history.Add(marchBuyDate, quote);
Assert.AreEqual(stocksQuantity, investment.Open(openDate, closeDate, amount));
}