This is a chess implementation in javascript and a fork of https://github.com/kbjorklu/chess
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190 lines
7.9 KiB
190 lines
7.9 KiB
/*
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* Automated tests for the chess logic. UI is not tested.
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*/
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"use strict";
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module("chess.js");
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test("utilities", function() {
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strictEqual(Chess.getRank(0), 0);
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strictEqual(Chess.getRank(7), 0);
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strictEqual(Chess.getRank(56), 7);
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strictEqual(Chess.getRank(63), 7);
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strictEqual(Chess.getFile(0), 0);
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strictEqual(Chess.getFile(7), 7);
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strictEqual(Chess.getFile(56), 0);
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strictEqual(Chess.getFile(63), 7);
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strictEqual(Chess.isInsideBoard(0, 0), true);
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strictEqual(Chess.isInsideBoard(7, 7), true);
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strictEqual(Chess.isInsideBoard(-1, -1), false);
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strictEqual(Chess.isInsideBoard(8, 8), false);
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strictEqual(Chess.isInsideBoard(-1, 0), false);
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strictEqual(Chess.isInsideBoard(8, 0), false);
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strictEqual(Chess.isInsideBoard(0, -1), false);
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strictEqual(Chess.isInsideBoard(0, 8), false);
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strictEqual(Chess.getIndex(0, 0), 0);
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strictEqual(Chess.getIndex(0, 7), 7);
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strictEqual(Chess.getIndex(7, 0), 56);
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strictEqual(Chess.getIndex(7, 7), 63);
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strictEqual(Chess.isLight(0, 0), false);
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strictEqual(Chess.isLight(0, 7), true);
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strictEqual(Chess.getAlgebraic(0, 0), "a1");
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strictEqual(Chess.getAlgebraic(7, 7), "h8");
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strictEqual(Chess.getIndexFromAlgebraic("a1"), 0);
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strictEqual(Chess.getIndexFromAlgebraic("h8"), 63);
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strictEqual(Chess.getAlgebraicFromIndex(0), "a1");
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strictEqual(Chess.getAlgebraicFromIndex(63), "h8");
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strictEqual(Chess.getOtherPieceColor(Chess.PieceColor.WHITE), Chess.PieceColor.BLACK);
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strictEqual(Chess.getOtherPieceColor(Chess.PieceColor.BLACK), Chess.PieceColor.WHITE);
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});
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module("bitboard.js");
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test("Bitboard", function() {
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strictEqual(Chess.Bitboard.makeLightSquares().popcnt(), 32);
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strictEqual(Chess.Bitboard.makeDarkSquares().popcnt(), 32);
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strictEqual(Chess.Bitboard.makeLightSquares().xor(Chess.Bitboard.makeDarkSquares()).popcnt(), 64);
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for (var k = 0; k < 8; ++k) {
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strictEqual(Chess.Bitboard.makeFile(k).popcnt(), 8);
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strictEqual(Chess.Bitboard.makeRank(k).popcnt(), 8);
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}
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for (var l = -7; l < 8; ++l) {
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strictEqual(Chess.Bitboard.makeDiagonal(l).popcnt(), 8 - Math.abs(l));
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strictEqual(Chess.Bitboard.makeAntidiagonal(l).popcnt(), 8 - Math.abs(l));
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}
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var is = [0, 1, 7, 8, 31, 32, 55, 56, 62, 63];
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var js = [0, 15, 31, 32, 40, 63];
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for (var ii = 0; ii < is.length; ++ii) {
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var i = is[ii];
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var bbi = Chess.Bitboard.makeIndex(i);
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strictEqual(bbi.popcnt(), 1);
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strictEqual(bbi.isEmpty(), false);
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for (var ji = 0; ji < js.length; ++ji) {
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var j = js[ji];
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var or = Chess.Bitboard.makeIndex(i).or(Chess.Bitboard.makeIndex(j));
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var hi = Chess.Bitboard.makeIndex((i > j) ? i : j);
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deepEqual(or.popLowestBit(), (i === j) ? Chess.Bitboard.ZERO : hi);
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or = Chess.Bitboard.makeIndex(i).or(Chess.Bitboard.makeIndex(j));
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strictEqual(or.isEmpty(), false);
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strictEqual(or.popcnt(), (i === j) ? 1 : 2);
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strictEqual(or.getLowestBitPosition(), (i < j) ? i : j);
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strictEqual(or.isSet(i), true);
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strictEqual(or.isSet(j), true);
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strictEqual(or.isClear(i), false);
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strictEqual(or.isClear(j), false);
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strictEqual(bbi.isSet(j), j === i);
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strictEqual(bbi.isClear(j), j !== i);
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var xor = Chess.Bitboard.makeIndex(i).xor(Chess.Bitboard.makeIndex(j));
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strictEqual(xor.popcnt(), (i === j) ? 0 : 2);
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strictEqual(xor.isEmpty(), i === j);
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var bbj = bbi.dup();
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bbj.setBit(j);
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deepEqual(bbj, or);
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strictEqual(bbj.isEqual(or), true);
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bbj.clearBit(j);
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deepEqual(bbj, (i === j) ? Chess.Bitboard.ZERO : bbi);
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}
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}
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// TODO: test knight and king movement
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// TODO: test shifts
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});
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module("zobrist.js");
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test("Zobrist", function() {
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var zobrist = new Chess.Zobrist(0, 0);
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var dup = zobrist.dup();
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deepEqual(zobrist, dup);
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zobrist.updateTurn();
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notDeepEqual(zobrist, dup);
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zobrist.updateTurn();
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deepEqual(zobrist, dup);
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var lightSquares = Chess.Bitboard.LIGHT_SQUARES;
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strictEqual(lightSquares.popcnt(), 32);
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zobrist.updatePieceColorBitboard(Chess.Piece.QUEEN, Chess.PieceColor.BLACK, lightSquares);
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strictEqual(lightSquares.popcnt(), 32);
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notDeepEqual(zobrist, dup);
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});
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module("move.js");
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test("Move", function() {
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var move = new Chess.Move(32, 33, Chess.Move.Kind.CAPTURE, Chess.Piece.ROOK, Chess.Piece.QUEEN);
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strictEqual(move.getFrom(), 32);
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strictEqual(move.getTo(), 33);
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strictEqual(move.getKind(), Chess.Move.Kind.CAPTURE);
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strictEqual(move.getPiece(), Chess.Piece.ROOK);
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strictEqual(move.isCapture(), true);
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strictEqual(move.getCapturedPiece(), Chess.Piece.QUEEN);
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strictEqual(move.isPromotion(), false);
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strictEqual(move.isCastle(), false);
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strictEqual(move.getCaptureSquare(), 33);
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});
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module("position.js");
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// TODO: getPieceAtOrNull vs findPieceAtOrNull
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// TODO: castling
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// TODO: capture
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// TODO: piece consistency, move consistency
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// TODO: promotion
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test("Position", function() {
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var position = new Chess.Position;
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strictEqual(position.getPieceBitboard(Chess.Piece.PAWN).popcnt(), 16);
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});
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test("Perft", function() {
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strictEqual(Chess.Position.perft(3), 8902, "Perft(3)");
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strictEqual(Chess.Position.perft(4), 197281, "Perft(4)");
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});
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function checkPositionHash(chessPosition) {
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var old = chessPosition.hashKey.dup();
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chessPosition.updateHashKey();
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return chessPosition.hashKey.isEqual(old);
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}
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test("Hashing", function() {
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var position = new Chess.Position;
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ok(checkPositionHash(position));
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var dup = position.hashKey.dup();
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position.makeMove(position.getMoves(true)[0]);
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ok(checkPositionHash(position));
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notDeepEqual(position.hashKey, dup);
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ok(position.canUndo());
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position.unmakeMove();
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ok(checkPositionHash(position));
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deepEqual(position.hashKey, dup);
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});
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module("parser.js");
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/**
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* @see http://goo.gl/B39TC (Algebraic notation)
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* @see http://goo.gl/ZgMC1 (Peruvian Immortal)
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*/
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test("Parser", function() {
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strictEqual(Chess.Parser.clean("A4 )( (B- (C! ( ( D? ) ) E F)) G5"), "A4 G5");
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var chessPosition = Chess.Parser.parseMoves("1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Qxd7 5. c4 Nc6 6. Nc3 Nf6 7. 0-0 g6 8. d4 cxd4 9. Nxd4 Bg7 10. Nde2 Qe6!? (a novelty suggested by Irina Krush and considered a turning point for the World Team) 11. Nd5 Qxe4 12. Nc7+ Kd7 13. Nxa8 Qxc4 14. Nb6+ axb6 15. Nc3 Ra8 16. a4 Ne4 17. Nxe4 Qxe4 18. Qb3 f5 19. Bg5 Qb4 20. Qf7 Be5 21. h3 Rxa4 22. Rxa4 Qxa4 23. Qxh7 Bxb2 24. Qxg6 Qe4 25. Qf7 Bd4 26. Qb3 f4 27. Qf7 Be5 28. h4 b5 29. h5 Qc4 30. Qf5+ Qe6 31. Qxe6+ Kxe6 (see diagram) 32. g3 fxg3 33. fxg3 b4 (the World Team did not trust 33...Bxg3 34.h6 Be5 35.h7 Bg7 36.Rf8 b4 37.h8=Q Bxh8 38.Rxh8) 34. Bf4 Bd4+ 35. Kh1! b3 36. g4 Kd5 37. g5 e6 38. h6 Ne7 39. Rd1 e5 40. Be3 Kc4 41. Bxd4 exd4 42. Kg2 b2 43. Kf3 Kc3 44. h7 Ng6 45. Ke4 Kc2 46. Rh1 d3 (46...b1=Q? 47.Rxb1 Kxb1 48.Kxd4 and White will win) 47. Kf5 b1=Q 48. Rxb1 Kxb1 49. Kxg6 d2 50. h8=Q d1=Q 51. Qh7 b5?! 52. Kf6+ Kb2 53. Qh2+ Ka1 54. Qf4 b4? 55. Qxb4 Qf3+ 56. Kg7 d5 57. Qd4+ Kb1 58. g6 Qe4 59. Qg1+ Kb2 60. Qf2+ Kc1 61. Kf6 d4 62. g7 1–0");
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strictEqual(chessPosition.getColorBitboard(Chess.PieceColor.BLACK).popcnt(), 3);
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ok(chessPosition.getColorBitboard(Chess.PieceColor.BLACK).isSet(2));
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ok(chessPosition.getColorBitboard(Chess.PieceColor.BLACK).isSet(Chess.getIndex(3, 3)));
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ok(chessPosition.getColorBitboard(Chess.PieceColor.BLACK).isSet(Chess.getIndex(3, 4)));
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strictEqual(chessPosition.getColorBitboard(Chess.PieceColor.WHITE).popcnt(), 3);
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ok(chessPosition.getColorBitboard(Chess.PieceColor.WHITE).isSet(Chess.getIndex(1, 5)));
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ok(chessPosition.getColorBitboard(Chess.PieceColor.WHITE).isSet(Chess.getIndex(5, 5)));
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ok(chessPosition.getColorBitboard(Chess.PieceColor.WHITE).isSet(Chess.getIndex(6, 6)));
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var chessPosition2 = Chess.Parser.parseMoves("1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 c6 5. Nf3 Bg4 6. Bf4 e6 7. h3 Bxf3 8. Qxf3 Bb4 9. Be2 Nd7 10. a3 0-0-0");
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strictEqual(chessPosition2.getColorBitboard(Chess.PieceColor.BLACK).popcnt(), 14);
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strictEqual(chessPosition2.getColorBitboard(Chess.PieceColor.WHITE).popcnt(), 14);
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strictEqual(chessPosition2.getPieceBitboard(Chess.Piece.PAWN).popcnt(), 14);
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});
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module("ai.js");
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test("AI", function() {
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var ai = new Chess.AI;
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notStrictEqual(ai.search(new Chess.Position), null);
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});
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