public function testGetBlacklistFilter()
{
mkdir('sub');
touch('alpha.php');
touch('beta.php');
touch('sub/beta.php');
$alpha = new SplFileInfo('alpha.php');
$beta = new SplFileInfo('beta.php');
$sub = new SplFileInfo('sub/alpha.php');
$this->setConfig(array('blacklist' => 'beta.php'));
$callable = $this->config->getBlacklistFilter();
$this->assertNull($callable($alpha));
$this->assertFalse($callable($beta));
$this->assertNull($callable($sub));
}