public function testValidId()
{
$a = array();
$a[] = self::$db->load(null);
$a[] = self::$db->load('');
$a[] = self::$db->load(0);
$ex = array(null, null, null);
$this->assertEquals($ex, $a);
}
/**
* Save index
*/
public function store()
{
$this->sort();
// keep map sorted by key
$this->db->save('_' . $this->name . '_index', array('name' => $this->name, 'type' => 'index', 'map' => $this->map, 'inverse' => $this->inverse));
}