public void BishopBorderBlocked()
{
BitBoard border = 0xff818181818181ff;
BitBoard borderInner = 0x7e424242427e00;
var corners = BitBoards.MakeBitboard(Squares.a1, Squares.a8, Squares.h1, Squares.h8);
const int expectedCorner = 1; // just a single attack square no matter what
const int expectedSide = 2;
/*
* borderInner (X = set bit) :
*
* 0 0 0 0 0 0 0 0
* 0 X X X X X X 0
* 0 X 0 0 0 0 X 0
* 0 X 0 0 0 0 X 0
* 0 X 0 0 0 0 X 0
* 0 X 0 0 0 0 X 0
* 0 X X X X X X 0
* 0 0 0 0 0 0 0 0
*
*/
foreach (var square in border)
{
var attacks = square.BishopAttacks(borderInner);
attacks.IsEmpty.Should().BeFalse();
var expected = corners & square ? expectedCorner : expectedSide;
var actual = attacks.Count;
Assert.Equal(expected, actual);
}
}
public void MakeBitBoardTest()
{
// a few squares
var b1 = BitBoards.MakeBitboard(Squares.a1, Squares.b1, Squares.a2, Squares.b2);
var b2 = Squares.a1.BitBoardSquare() | Squares.b1.BitBoardSquare() | Squares.a2.BitBoardSquare() | Squares.b2.BitBoardSquare();
Assert.Equal(b1, b2);
// a single square (not needed, but still has to work in case of list of squares etc)
var b3 = BitBoards.MakeBitboard(Squares.h3);
var b4 = Squares.h3.BitBoardSquare();
Assert.Equal(b3, b4);
}