public function testBufferPdfa()
 {
     $indir = __DIR__ . '/../util/vendor/font/';
     $objnum = 1;
     $stack = new \Com\Tecnick\Pdf\Font\Stack(1, true, false, true);
     new \Com\Tecnick\Pdf\Font\Import($indir . 'pdfa/pfb/PDFAHelveticaBoldOblique.pfb');
     $stack->add($objnum, 'arial', 'BIUDO', '', true);
     $font = $stack->getFont('pdfahelveticaBI');
     $this->assertNotEmpty($font);
 }