public void A8ToString()
{
// Arrange
var move = new Move("A8");
// Assert
Assert.AreEqual("A8", move.ToString());
}
public void A9ToPos()
{
// Arrange
var move = new Move("A8");
// Act
int pos = move.Pos;
// Assert
Assert.AreEqual(7, pos);
}
public void H1ToPos()
{
// Arrange
var move = new Move("H1");
// Act
int pos = move.Pos;
// Assert
Assert.AreEqual(56, pos);
}
public void H1ToString()
{
// Arrange
var move = new Move("H1");
// Assert
Assert.AreEqual("H1", move.ToString());
}
/// <summary>
/// Play a move.
/// </summary>
/// <param name="move">Move to play.</param>
/// <returns>Board result after move has been played.</returns>
/// <exception cref="ArgumentNullException">If move is null.</exception>
/// <exception cref="ArgumentException">If move is invalid.</exception>
public virtual Board Play(Move move)
{
if (move == null)
{
throw new ArgumentNullException("move");
}
int pos = move.Pos;
long opponent = ~(this.empty | this.mover);
long cumulativeChange = 0;
// up
cumulativeChange |= scanDirection(pos, 8, opponent, p => p <= 63);
// down
cumulativeChange |= scanDirection(pos, -8, opponent, p => p >= 0);
// left
cumulativeChange |= scanDirection(pos, 1, opponent, p => p <= 63 && (p % 8) != 0);
// right
cumulativeChange |= scanDirection(pos, -1, opponent, p => p >= 0 && ((p + 1) % 8) != 0);
// up-left
cumulativeChange |= scanDirection(pos, 9, opponent, p => p <= 63 && (p % 8) != 0);
// up-right
cumulativeChange |= scanDirection(pos, 7, opponent, p => p <= 63 && ((p + 1) % 8 != 0));
// down-right
cumulativeChange |= scanDirection(pos, -9, opponent, p => p >= 0 && ((p + 1) % 8) != 0);
// down-left
cumulativeChange |= scanDirection(pos, -7, opponent, p => p >= 0 && (p % 8) != 0);
if (cumulativeChange == 0)
{
throw new ArgumentException("Invalid move", "move");
}
long newEmpty = this.empty ^ (1L << move.Pos);
long mover = opponent ^ cumulativeChange;
return new Board(newEmpty.ToUInt64(), mover.ToUInt64(), this.color.Opponent());
}
