private bool Capture(Position position)
{
if (!ChessBoard.IsLegalBoardPosition(position))
{
return(false);
}
//Do not allow to move if no piece to capture
if (ChessBoard.Cells[position.XCoordinate, position.YCoordinate].IsEmpty)
{
return(false);
}
return(TryMoveChessPiece(position));
}
public override bool IsLegalMove(MovementType movementType, int newX, int newY)
{
// we need to know the board configuration first.
if ((ChessBoard == null) || (!ChessBoard.IsLegalBoardPosition(newX, newY)))
{
return(false);
}
// Capture or move? This is the question! :)
// Capture is not yet considered for the task, but still, we leave here an open door for future impleemntations
// Move : X remains the same and Y increments for White, decrements for Black
// Capture: X varies by 1 and Y increments for White, decrements for Black, only if target pos is occupied by opponent piece
return
((newY == YCoordinate + PawnMoveDirection) && (
(newX == XCoordinate) || // Move
((movementType == MovementType.Capture) && // Capture
(Math.Abs(newX - XCoordinate) == 1) &&
((ChessBoard.GetPieceAtPosition(newX, newY) ?? this).PieceColor != this.PieceColor)
)
));
}
protected bool TryMoveChessPiece(Position newPosition)
{
if (!ChessBoard.IsLegalBoardPosition(newPosition))
{
return(false);
}
IChessBoardCell cell = ChessBoard.Cells[newPosition.XCoordinate, newPosition.YCoordinate];
if (!cell.IsEmpty)
{
if (cell.ContainingChessPiece.Color == Color)
{
return(false);
}
cell.ContainingChessPiece.Capture();
}
parentCell.RemoveChessPiece();
cell.PlaceChessPiece(this);
return(true);
}
public void IsLegalBoardPosition_True_X_equals_0_Y_equals_0()
{
var isValidPosition = chessBoard.IsLegalBoardPosition(new Position(0, 0));
Assert.IsTrue(isValidPosition);
}