public void TwoBooks_16Bucks()
{
BookSet set = new BookSet();
set.AddBook(0);
set.AddBook(1);
Assert.AreEqual(15.2d, set.CalculatePrice());
}
internal decimal GetPriceFor(BookSet bookSet)
{
var countOfBooksInSet = bookSet.Books.Count(b => b!=null);
var discountMultiplier = _discountByCount.ContainsKey(countOfBooksInSet)
? _discountByCount[countOfBooksInSet]
: 1;
return (countOfBooksInSet * 8M) * discountMultiplier;
}
public BookSet Clone()
{
BookSet set = new BookSet();
for (int i = 0; i < _set.Length; i++)
if (_set[i] > 0)
set.AddBook(i);
return set;
}
private static BookSet[] InitialiseEnoughSetsForHighestFrequencyBook(int setSize, int highestFrequency)
{
var sets = new BookSet[highestFrequency];
foreach (var i in Enumerable.Range(0, highestFrequency))
{
sets[i] = new BookSet(setSize);
}
return sets;
}
public double CalculatePriceIfBookWasAddedToSet(BookSet potentialSet, int index)
{
double total = 0;
foreach (BookSet set in _booksets)
if (set == potentialSet)
{
BookSet copy = potentialSet.Clone();
copy.AddBook(index);
total += copy.CalculatePrice();
}
else
total += set.CalculatePrice();
return total;
}
public void OneBook_8Bucks()
{
BookSet set = new BookSet();
set.AddBook(0);
Assert.AreEqual(8, set.CalculatePrice());
}
public void EmptySet_CostsNothing()
{
BookSet set = new BookSet();
Assert.AreEqual(0, set.CalculatePrice());
}
private BookSet CreateNewBookSetContainingBook(int index)
{
BookSet set = new BookSet();
set.AddBook(index);
return set;
}
