public static Technique[] Parse(IEnumerable <string> lines, long numCards)
{
var parsedInputs = new List <Technique>();
foreach (var line in lines)
{
var split = line.Split(' ');
Technique pi = null;
if (split[0] == "cut")
{
pi = new Cut(split[1], numCards);
}
else if (split[0] == "deal")
{
if (split[3] == "stack")
{
pi = new Revert();
}
else
{
pi = new Deal(split[3], numCards);
}
}
else
{
throw new Exception("unparseable line");
}
parsedInputs.Add(pi);
}
return(parsedInputs.ToArray());
}
public void TestBackTrackRevert()
{
var cards = new int[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
var reverted = new Revert().Apply(cards);
for (int n = 0; n < cards.Length; n++)
{
var indexInReverted = n;
var indexInCards = new Revert().BackTrack(indexInReverted, 10);
Assert.AreEqual(cards[indexInCards], reverted[indexInReverted]);
}
}