1--TEST--
2Check that SplDoublyLinkedList::unshift generate a warning and return NULL with missing param
3--CREDITS--
4PHPNW Testfest 2009 - Simon Westcott (swestcott@gmail.com)
5--FILE--
6<?php
7$dll = new SplDoublyLinkedList();
8var_dump($dll->unshift());
9?>
10--EXPECTF--
11Warning: SplDoublyLinkedList::unshift() expects exactly 1 parameter, 0 given in %s on line %d
12NULL
13