public void RemoveStock()
{
// Arrange
stockMarket = new StockMarket();
PrepareMockDataToStockMarket();
// Act
List <Stock> stocks = stockMarket.GetStocks();
Stock google = stocks[0];
Stock myExpensiveStocks = stocks[1];
stockMarket.RemoveStock(google);
// Assert
Assert.AreEqual(stockMarket.GetStocks()[0], myExpensiveStocks);
}