public void Get_ProductWithVolumeDiscount_ReturnsCorrectPrices()
{
var product = new Product("A", 10, new VolumeDiscount(20, 3));
var price = PriceCalculator.Get(product, 3);
Assert.Equal(20, price.Total);
Assert.Equal(0, price.UnitPrice);
Assert.Equal(20, price.VolumePrice);
}
public void Get_ProductWithoutVolume_ReturnsCorrectPrices()
{
var product = new Product("A", 10);
var price = PriceCalculator.Get(product, 4);
Assert.Equal(40, price.Total);
Assert.Equal(40, price.UnitPrice);
Assert.Equal(0, price.VolumePrice);
}