public void CanGroupDistinctBooks()
{
var basket = new Basket();
basket.Add(Book.A);
basket.Add(Book.A);
basket.Add(Book.B);
basket.Add(Book.B);
basket.Add(Book.C);
basket.Add(Book.C);
basket.Add(Book.D);
basket.Add(Book.E);
var bookGrouper = new BookGrouper();
var distinctGroups = bookGrouper.SortBooksIntoDistinctGroups(basket.Books);
Assert.Equal(2, distinctGroups.Count);
}
public decimal CalculateBasketTotal()
{
var basketTotal = 0m;
var grouper = new BookGrouper();
var distinctProductGroups = grouper.SortBooksIntoDistinctGroups(this.basket.Books);
var productDiscounter = new PriceDiscountCalculator();
foreach (var distinctProductGroup in distinctProductGroups)
{
var totalGroupPrice = GetGroupPrice(distinctProductGroup.Count, this.fullProductPrice);
basketTotal += productDiscounter.TotalDiscountAppliedToDistinctBookCollection(
distinctProductGroup.Count,
totalGroupPrice);
}
return(basketTotal);
}
