src/main.c


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#include "unittest.h"
#include "board.h"

int main() {
  {
    start_test_section("Bitboards");
    unit_test(pop_count(0b01110) == 3, "Pop count of 01110 is 3");
  }

  {
    start_test_section("Test knight attacks");
    Bitboard attacks[64];
    precompute_knight_attack_table(attacks);

    int max_attacks = 0;
    for (int i = 0; i < 64; i++) {
      int attack_count = pop_count(attacks[i]);
      if (attack_count > max_attacks) max_attacks = attack_count;
    }
    unit_test(max_attacks == 8, "Max amount of knight attacks should be 8");

    {
      U64 bit = 1;
      unit_test(
          attacks[b7] == ((bit << d8) | (bit << d6) | (bit << c5) | (bit << a5)),
          "Knight on b7 attacks only d8, d6, c5, a5"
      );
    }
  }

  {
    start_test_section("Default FEN string");
    Board board = parse_FEN("rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1");
    unit_test(pop_count(board.pieces[PAWN] | board.pieces[PAWN | BLACK]) == 16, "There are 16 pawns total");
    unit_test(pop_count(board.pieces[ROOK]) == 2, "There are 2 white rooks");
    // TODO
    unit_test(board.side == WHITE, "Side to move is white");
    unit_test(board.castling_rights == 0, "Everyone can castle");
    unit_test(board.en_passant_square == 0, "No en passant move is avaialble");
  }

  report();
  return 0;
}