@Test
public void test() {
Zobrist.init();
Position position = Position.fromFEN(Chess.START_POS_FEN);
long hash = Zobrist.hashForPosition(position);
assertEquals(hash, position.zobristHash);
position.move(MoveUtils.create(Chess.Square.E2, Chess.Square.E4));
long hash2 = Zobrist.hashForPosition(position);
assertEquals(hash2, position.zobristHash);
position.unmakeMove();
assertEquals(hash, position.zobristHash);
// Another position
position = Position.fromFEN("r1bqkbnr/pppppppp/8/8/1n6/5N2/PPPPPPPP/RNBQKB1R w KQkq - 2 1");
zz(position);
position.move(MoveUtils.create(Chess.Square.B4, Chess.Square.A2));
zz(position);
// Another position
position = Position.fromFEN("r1bqkbnr/pppppppp/8/8/1n6/5N2/PPPPPPPP/RNBQKB1R b KQkq - 0 1");
zz(position);
position.move(MoveUtils.create(Chess.Square.A8, Chess.Square.B8));
zz(position);
position.unmakeMove();
zz(position);
// Another position
position = Position.fromFEN("rnbqkbnr/pppp1ppp/8/8/3Pp3/N4N2/PPP1PPPP/R1BQKB1R b KQkq - 0 1");
long hash3 = Zobrist.hashForPosition(position);
assertEquals(hash3, position.zobristHash);
position.move(MoveUtils.create(Chess.Square.E4, Chess.Square.F3));
zz(position);
position.move(MoveUtils.create(Chess.Square.G2, Chess.Square.F3));
zz(position);
position.unmakeMove();
position.unmakeMove();
assertEquals(hash3, position.zobristHash);
// Another position
position = Position.fromFEN("r1bqkbnr/ppp1pppp/n2p4/8/8/5N2/PPPPPPPP/RNBQKB1R b KQ - 0 1");
zz(position);
position.move(MoveUtils.create(Chess.Square.E8, Chess.Square.D7));
zz(position);
position.unmakeMove();
zz(position);
// Another position (capture)
position = Position.fromFEN("4k3/5P2/8/8/8/8/8/4K2R b K - 0 1");
zz(position);
position.move(MoveUtils.create(Chess.Square.E8, Chess.Square.F7));
zz(position);
position.unmakeMove();
zz(position);
// Another position
position = Position.fromFEN("r1bqkbnr/ppp1pppp/n2p4/8/8/5N2/PPPPPPPP/RNBQKB1R b KQkq - 0 1");
zz(position);
position.move(MoveUtils.create(Chess.Square.E8, Chess.Square.D7));
zz(position);
position.unmakeMove();
zz(position);
// Castling
position = Position.fromFEN("4k3/8/8/8/8/8/8/4K2R w K - 0 1");
zz(position);
position.move(MoveUtils.create(Chess.Square.E1, Chess.Square.G1));
zz(position);
position.unmakeMove();
zz(position);
// Another position
position = Position.fromFEN("rnbqkbnr/pppp1ppp/8/8/3Pp3/N4N2/PPP1PPPP/R1BQKB1R b KQkq d3 0 1");
zz(position);
position.move(MoveUtils.create(Chess.Square.E4, Chess.Square.F3));
zz(position);
assertEquals(0, position.epSquare);
position.unmakeMove();
zz(position);
assertNotEquals(0, position.epSquare);
// EP
position = Position.fromFEN("rnbqkbnr/pppp1ppp/8/8/4p3/N4N2/PPPPPPPP/R1BQKB1R w KQkq - 0 1 ");
zz(position);
position.move(MoveUtils.create(Chess.Square.D2, Chess.Square.D4));
zz(position);
position.move(MoveUtils.create(Chess.Square.E4, Chess.Square.F3));
zz(position);
position.unmakeMove();
zz(position);
position.unmakeMove();
zz(position);
// EP unmake
position = Position.fromFEN("rnbqkbnr/pppp1ppp/8/8/3Pp3/N4N2/PPP1PPPP/R1BQKB1R b KQkq d3 0 1");
position.move(MoveUtils.create(Chess.Square.E4, Chess.Square.D3));
zz(position);
position.unmakeMove();
zz(position);
}
/**
* Check that position's stored hash is the same as the calculated hash
*
* @param position
*/
private void zz(Position position) {
assertEquals(Zobrist.hashForPosition(position), position.zobristHash);
}
