public void GetDirection_MoveFromBFileToAFileOnFirstRank_ReturnsLeft()
{
Position origin = new Position(2, 1, PositionStatus.White);
Position destination = new Position(1, 1, PositionStatus.White);
Direction result = origin.GetDirectionTo(destination);
Assert.AreEqual(Direction.Left, result);
}
public void GetDirection_MoveARankForwardAndAFileForward_ReturnsForwardOnRightDiagonal()
{
Position origin = new Position(1, 1, PositionStatus.White);
Position destination = new Position(2, 2, PositionStatus.White);
Direction result = origin.GetDirectionTo(destination);
Assert.AreEqual(Direction.ForwardOnRightDiagonal, result);
}
public void Start(Position startingPosition, PieceColor playerToMove)
{
State = GameState.Normal;
PlayerToMove = playerToMove;
UpdateGameState(new Square(0, 0, new NullPiece(null)),
new Square(0, 0, new NullPiece(null)),
startingPosition,
PlayerToMove.GetOppositeColor());
}
private void UpdateGameState(Square from, Square to, Position newPosition, PieceColor playerWhoDidTheMove)
{
if (PlayerMovedPawnToPromotionRank(from, to))
{
State = GameState.Promotion;
}
else if (newPosition.WhiteKingIsInCheck() || newPosition.BlackKingIsInCheck())
{
State = newPosition.HasLegalMoves(PlayerToMove) ? GameState.Check : GameState.CheckMate;
}
else
{
State = newPosition.HasLegalMoves(PlayerToMove) &&
newPosition.HasLegalMoves(playerWhoDidTheMove)
? GameState.Normal
: GameState.StaleMate;
}
}
public void GetDirection_MoveFromFirstToSecondRank_ReturnsForward()
{
Position origin = new Position(1, 1, PositionStatus.White);
Position destination = new Position(1, 2, PositionStatus.White);
Direction result = origin.GetDirectionTo(destination);
Assert.AreEqual(Direction.Forward, result);
}
public void GetDirection_MoveFromThirdToFirstRank_ReturnBackward()
{
Position origin = new Position(1, 3, PositionStatus.White);
Position destination = new Position(1, 2, PositionStatus.White);
Direction result = origin.GetDirectionTo(destination);
Assert.AreEqual(Direction.Backward, result);
}
public override void OnMove(Square from, Square to, Position newPosition)
{
var playerWhoDidTheMove = from.Color;
UpdatePlayerToMove(playerWhoDidTheMove);
UpdateGameState(from, to, newPosition, playerWhoDidTheMove);
}
