private static void KingStandardMovement()
{
Debug.WriteLine("Test: KingStandardMovement, Begin");
var board = new Board();
var KW = new King(new Vector2(4, 7), Color.White);
board.Pieces.Add(KW);
board.WhiteKing = KW;
//Check long straight slides
Debug.Assert(!KW.IsMoveValid(board, KW.Position.AddVector(0, 0)), "Dont move");
Debug.Assert(!KW.IsMoveValid(board, KW.Position.AddVector(0, 1)), "Move down, out of bounds");
Debug.Assert(KW.IsMoveValid(board, KW.Position.AddVector(0, -1)), "Move up");
Debug.Assert(!KW.IsMoveValid(board, KW.Position.AddVector(1, 1)), "Move diagonal");
Debug.Assert(KW.IsMoveValid(board, KW.Position.AddVector(-1, -1)), "Move diagonal negative");
Debug.WriteLine("Test: KingStandardMovement, End");
}
private static void KingCheckChecking()
{
Debug.WriteLine("Test: KingCheckChecking, Begin");
var board = new Board();
var KW = new King(new Vector2(4, 7), Color.White);
board.Pieces.Add(KW);
board.WhiteKing = KW;
//Move to the corner with no enemeies just fine
KW.Position = new Vector2(0, 6);
Debug.Assert(KW.IsMoveValid(board, new Vector2(0, 7)), "Moves into corner with no enemies gaurding");
//Create a bishop covering the corner at distance, king can no longer move to that space
var sniperBishop = new Bishop(new Vector2(7, 0), Color.Black);
board.Pieces.Add(sniperBishop);
Debug.Assert(!KW.IsMoveValid(board, new Vector2(0, 7)), "Cannot move into path of distant rook");
//Add a pawn between the corner and the rook, King can now move into the corner freely
var protectorPawn = new Pawn(new Vector2(6, 1), Color.White);
board.Pieces.Add(protectorPawn);
Debug.Assert(protectorPawn.IsMoveValid(board, protectorPawn.Position.AddVector(0, -1)), "move up");
Debug.Assert(KW.IsMoveValid(board, new Vector2(0, 7)), "Moves into corner with enemies gaurding because pawn is protecting path");
//Move king to corner covered by rook, but protected by pawn
KW.Position = new Vector2(0, 7);
//Move king freely
Debug.Assert(!KW.IsMoveValid(board, KW.Position.AddVector(0, 1)), "Move down, out of bounds");
Debug.Assert(!KW.IsMoveValid(board, KW.Position.AddVector(-1, 0)), "Move left, out of bounds");
Debug.Assert(!KW.IsMoveValid(board, KW.Position.AddVector(-1, 1)), "Move diagonal, out of bounds");
Debug.Assert(KW.IsMoveValid(board, KW.Position.AddVector(0, -1)), "Move up");
Debug.Assert(!KW.IsMoveValid(board, KW.Position.AddVector(1, 1)), "Move diagonal twoards threat, still protected");
//Attempting to Move pawn expsoses king to check
Debug.Assert(!protectorPawn.IsMoveValid(board, protectorPawn.Position.AddVector(0, -1)), "Can no longer move up because it would expose king to check");
//Killing rook with pawn protects king
Debug.Assert(protectorPawn.IsMoveValid(board, protectorPawn.Position.AddVector(1, -1)), "Kill rook. King is safe");
//Put another blocking pawn, then move original pawn. King still protected
var protectorPawn2 = new Pawn(new Vector2(5, 2), Color.White);
board.Pieces.Add(protectorPawn2);
Debug.Assert(protectorPawn.IsMoveValid(board, protectorPawn.Position.AddVector(0, -1)), "Move up now that a different pawn is blocking path");
Debug.Assert(protectorPawn2.IsMoveValid(board, protectorPawn2.Position.AddVector(0, -1)), "Move up now that a different pawn is blocking path");
Debug.Assert(!protectorPawn2.IsMoveValid(board, protectorPawn2.Position.AddVector(1, -1)), "Pawn can not attack teammate silly!");
Debug.WriteLine("Test: KingCheckChecking, End");
}
private static void KingBlockedMovementAndAttacks()
{
Debug.WriteLine("Test: KingBlockedMovementAndAttacks, Begin");
var board = new Board();
var KW = new King(new Vector2(4, 7), Color.White);
board.Pieces.Add(KW);
board.WhiteKing = KW;
//Test the King movement getting blocked by friends and attacking enemies
var blockingPawn = new Pawn(new Vector2(4, 6), Color.White);
board.Pieces.Add(blockingPawn);
Debug.Assert(!KW.IsMoveValid(board, KW.Position.AddVector(0, -1)), "Friendly blocking destination");
blockingPawn.Position = new Vector2(5, 6);
Debug.Assert(!KW.IsMoveValid(board, KW.Position.AddVector(1, -1)), "Friendly blocking diagonal destination");
blockingPawn.Color = Color.Black;
Debug.Assert(KW.IsMoveValid(board, KW.Position.AddVector(1, -1)), "Enemy attacked at diagonal destination");
blockingPawn.Position = new Vector2(4, 6);
Debug.Assert(!KW.IsMoveValid(board, KW.Position.AddVector(1, 0)), "Move puts me in check");
Debug.Assert(!KW.IsMoveValid(board, KW.Position.AddVector(-1, 0)), "Move puts me in check");
//Check that the King can kill a enemy holding him in check
Debug.Assert(KW.IsMoveValid(board, KW.Position.AddVector(0, -1)), "Attack enemy putting me in check");
//Check that the king cannot kill a piece holding it in check if that in turn puts it into further check
var pawnReinforcements = new Pawn(new Vector2(3, 5), Color.Black);
board.Pieces.Add(pawnReinforcements);
Debug.Assert(!KW.IsMoveValid(board, KW.Position.AddVector(0, -1)), "Attack enemy putting me in check, blocked by enemy protecting him");
//However, killing that enemy totally works if the covering peice is your teammate
pawnReinforcements.Color = Color.White;
Debug.Assert(KW.IsMoveValid(board, KW.Position.AddVector(0, -1)), "Attack enemy putting me in check, protected by teammate");
//Knight sitting off in the distance, protcting a pawn
Knight knightStealthy = new Knight(blockingPawn.Position.AddVector(1, -2), Color.Black);
board.Pieces.Add(knightStealthy);
Debug.Assert(!KW.IsMoveValid(board, KW.Position.AddVector(0, -1)), "Attack enemy putting me in check, enemy is protected by knight");
Debug.WriteLine("Test: KingBlockedMovementAndAttacks, End");
}
public static void KingCastling()
{
Debug.WriteLine("Test: KingCastling, Begin");
var board = new Board();
//Create King and 2 rooks in standard positions
var KW = new King(new Vector2(4, 7), Color.White);
var RW0 = new Rook(new Vector2(0, 7), Color.White);
var RW1 = new Rook(new Vector2(7, 7), Color.White);
board.Pieces.Add(KW);
board.Pieces.Add(RW0);
board.Pieces.Add(RW1);
board.WhiteKing = KW;
//Castle in both directions
Debug.Assert(KW.IsMoveValid(board, KW.Position.AddVector(2, 0)), "Castled with the King Rook");
Debug.Assert(KW.IsMoveValid(board, KW.Position.AddVector(-2, 0)), "Castled with the Queen Rook");
//Castling doesnt work if path of king passes through a checked position
var QB0 = new Queen(new Vector2(2, 2), Color.Black);
board.Pieces.Add(QB0);
Debug.Assert(!KW.IsMoveValid(board, KW.Position.AddVector(-2, 0)), "Castled with the Queen Rook, path gaurded by queen");
//Block the queens path and it works again
var blockingPawn = new Pawn(new Vector2(2, 6), Color.White);
board.Pieces.Add(blockingPawn);
Debug.Assert(KW.IsMoveValid(board, KW.Position.AddVector(-2, 0)), "Castled with the Queen Rook, queens view blocked by hero pawn");
//Block the kings path with a teammate
blockingPawn.Position = new Vector2(2, 7);
Debug.Assert(!KW.IsMoveValid(board, KW.Position.AddVector(-2, 0)), "Castled with the Queen Rook, hero pawn is now in the way");
Debug.WriteLine("Test: KingCastling, End");
}
