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