public void Test_Knuth_Shuffler_Uses_All_Elements_From_Given_Enumerable()
{
var knuthShuffler = new KnuthShuffler();
var initial = new byte[] { 0, 1, 2, 3, 3 }.ToList();
var shuffled = knuthShuffler.Shuffle(initial);
Assert.Equal(initial.Count, shuffled.Count());
foreach (var elm in shuffled)
{
initial.Remove(elm);
}
Assert.Empty(initial);
}
public void ShuffleDelegateStrategyTest()
{
// It is possible, but highly unlikely that the 1st five cards of a
// shuffled deck would be the same as the first 5 cards in an unshuffled deck.
CardDeck deck = new CardDeck();
string c1 = deck.Deal().Code;
string c2 = deck.Deal().Code;
string c3 = deck.Deal().Code;
string c4 = deck.Deal().Code;
string c5 = deck.Deal().Code;
deck = new CardDeck();
IShuffler shuffler = new KnuthShuffler();
deck.Shuffle(shuffler.Shuffle);
string a1 = deck.Deal().Code;
string a2 = deck.Deal().Code;
string a3 = deck.Deal().Code;
string a4 = deck.Deal().Code;
string a5 = deck.Deal().Code;
Assert.IsFalse((c1 == a1) && (c2 == a2) && (c3 == a3) && (c4 == a4) && (c5 == a5));
}
