Pop\File\Dir::getGroup PHP Метод

    public function getGroup()
    {
        $group = array();
        if (DIRECTORY_SEPARATOR == '/') {
            if (file_exists($this->path)) {
                $group = posix_getgrgid(filegroup($this->path));
            }
        }
        return $group;
    }

 public function testGetOwnerAndGroup()
 {
     $d = new Dir(__DIR__ . '/../tmp/');
     $this->assertTrue(array_key_exists('name', $d->getOwner()));
     $this->assertTrue(array_key_exists('name', $d->getGroup()));
     $this->assertTrue(array_key_exists('name', $d->getUser()));
     $this->assertTrue($d->isDir());
     $this->assertFalse($d->isFile());
     $this->assertGreaterThan(1, count($d->getObjects()));
 }