public function testInsufficientMaterial()
{
$chess = new ChessPublicator();
$this->assertSame($chess->insufficientMaterial(), false);
// k vs k
$chess->clear();
$chess->put(['type' => Chess::KING, 'color' => Chess::WHITE], 'e1');
$chess->put(['type' => Chess::KING, 'color' => Chess::BLACK], 'e8');
$this->assertSame($chess->insufficientMaterial(), true);
// k vs kn
$chess->clear();
$chess->put(['type' => Chess::KING, 'color' => Chess::WHITE], 'e1');
$chess->put(['type' => Chess::KING, 'color' => Chess::BLACK], 'e8');
$chess->put(['type' => Chess::KNIGHT, 'color' => Chess::WHITE], 'e4');
$this->assertSame($chess->insufficientMaterial(), true);
// k vs kb
$chess->clear();
$chess->put(['type' => Chess::KING, 'color' => Chess::WHITE], 'e1');
$chess->put(['type' => Chess::KING, 'color' => Chess::BLACK], 'e8');
$chess->put(['type' => Chess::BISHOP, 'color' => Chess::WHITE], 'e4');
$this->assertSame($chess->insufficientMaterial(), true);
// k vs k(b){0,} << bishop(s) in same color
$chess->clear();
$chess->put(['type' => Chess::KING, 'color' => Chess::WHITE], 'e1');
$chess->put(['type' => Chess::KING, 'color' => Chess::BLACK], 'e8');
$chess->put(['type' => Chess::BISHOP, 'color' => Chess::BLACK], 'e5');
$this->assertSame($chess->insufficientMaterial(), true);
$chess->put(['type' => Chess::BISHOP, 'color' => Chess::BLACK], 'd6');
$this->assertSame($chess->insufficientMaterial(), true);
$chess->put(['type' => Chess::BISHOP, 'color' => Chess::BLACK], 'c7');
$this->assertSame($chess->insufficientMaterial(), true);
$chess->put(['type' => Chess::BISHOP, 'color' => Chess::BLACK], 'b8');
$this->assertSame($chess->insufficientMaterial(), true);
}
