public void When_One_Set_In_List_Bigger_Than_Five_Set()
{
var bigListOneSet = ObjectMother.Builder.ThreeUniqueBooksOneDuplicate(8M);
var builder = new BookSetBuilder(5);
var sut = builder.Build(bigListOneSet.Books.ToList());
sut.Count().Should().Be(1);
}
public void One_Thousands_Books_Five_Of_Each_Should_Give_Two_HundredSets()
{
var books = ObjectMother.Builder.OneThousandBooks(8M);
var builder = new BookSetBuilder(5);
var sut = builder.Build(books.ToList());
sut.Count().Should().Be(200);
}
public void When_Two_Sets_In_List_We_Get_Two_Sets()
{
var bookBasket = ObjectMother.Builder.Two_Two_Two_One_One(8M);
var builder = new BookSetBuilder(5);
var sut = builder.Build(bookBasket.Books.ToList());
sut.Count.Should().Be(2);
}
public decimal Apply(BookBasket bookBasket)
{
var booksToDiscount = bookBasket.Books.ToList();
if (bookBasket.AllSame())
{
//todo move this into own class
return(booksToDiscount.Count() * _fullPrice);
}
bool hasDuplicates = bookBasket.HasDuplicates();
if (hasDuplicates)
{
var bookSetBuilder = new BookSetBuilder(_setCount);
var set = bookSetBuilder.Build(booksToDiscount);
decimal total = 0M;
int setCount = 0;
foreach (var item in set.Keys)
{
total += Calculate(set[item].Count, set[item]);
setCount += set[item].Count;
}
if (IncompleteSet(booksToDiscount, setCount))
{
total += (booksToDiscount.Count - setCount) * _fullPrice;
}
return(total);
}
var noOfUniqueBooks = bookBasket.Books.Count();
return(Calculate(noOfUniqueBooks, booksToDiscount));
}
