--TEST--
SPL: SplHeap::current - get current value from empty heap
--CREDITS--
Mike Sullivan <mikesul@php.net>
#TestFest 2009 (London)
--FILE--
<?php

class myHeap extends SplHeap
{
    public function compare($v1, $v2): int
    {
        throw new Exception('');
    }
}

$heap = new myHeap();
var_dump($heap->current());

?>
--EXPECT--
NULL