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1.1     ! misho       1: --TEST--
        !             2: SPL: SplHeap, test trivial method to find if a heap is empty
        !             3: --CREDITS--
        !             4: Nathaniel McHugh nat@fishtrap.co.uk
        !             5: #testfest London 2009-05-09
        !             6: --FILE--
        !             7: <?php
        !             8: 
        !             9: class MyHeap extends SplHeap{
        !            10: 
        !            11: public function compare($a, $b){
        !            12: return $a < $b;
        !            13: }
        !            14: 
        !            15: }
        !            16: 
        !            17: 
        !            18: $heap = new MyHeap();
        !            19: var_dump($heap->isEmpty());
        !            20: $heap->insert(1);
        !            21: var_dump($heap->isEmpty());
        !            22: $heap->extract();
        !            23: var_dump($heap->isEmpty());
        !            24: $heap->isEmpty('var');
        !            25: ?>
        !            26: --EXPECTF--
        !            27: bool(true)
        !            28: bool(false)
        !            29: bool(true)
        !            30: 
        !            31: Warning: SplHeap::isEmpty() expects exactly 0 parameters, 1 given in %s