[Test] //
public void GetTotalValueFoTwoSameProductA()
{
//Arrange
PointOfSaleTerminal pointOfSale = new PointOfSaleTerminal();
Product product = new Product("A", 2, 1.25);
//Act
pointOfSale.ScanProduct(product);
//Assert
Assert.AreEqual(2.5, pointOfSale.DiscountForA("A"));
}