public function testLimitReset()
{
$pipeline = new Pipeline($this->collection);
$pipeline->limit(11)->match(array('a' => 1, 'b' => array('$lt' => 12)))->limit(23);
$this->assertEquals('[{"$limit":11},{"$match":{"a":1,"b":{"$lt":12}}},{"$limit":23}]', (string) $pipeline);
}