public function testGetOwnerAndGroup()
{
$f = new File(__DIR__ . '/../tmp/access.txt');
$this->assertTrue(array_key_exists('name', $f->getOwner()));
$this->assertTrue(array_key_exists('name', $f->getDirOwner()));
$this->assertTrue(array_key_exists('name', $f->getGroup()));
$this->assertTrue(array_key_exists('name', $f->getDirGroup()));
$this->assertTrue(array_key_exists('name', $f->getUser()));
}