xref: /PHP-5.5/ext/spl/tests/heap_corruption.phpt (revision 6f75314b) 
1--TEST--
2SPL: SplHeap - heap corruption via compare exception (with top element deletion)
3--CREDITS--
4Mike Sullivan <mikesul@php.net>
5#TestFest 2009 (London)
6--FILE--
7<?php
8
9class myHeap extends SplHeap
10{
11	public $allow_compare = true;
12
13	public function compare($v1, $v2)
14	{
15		if ($this->allow_compare == true)
16		{
17			if ($v1 > $v2)
18			{
19				return 1;
20			}
21			else if ($v1 < $v2)
22			{
23				return -1;
24			}
25			else
26			{
27				return 0;
28			}
29		}
30		else
31		{
32			throw new Exception('Compare exception');
33		}
34	}
35}
36
37$heap = new myHeap();
38$heap->insert(1);
39$heap->insert(2);
40$heap->insert(3);
41$heap->insert(4);
42
43$heap->allow_compare = false;
44
45try {
46	$heap->extract();
47}
48catch (Exception $e) {
49	echo "Compare Exception: " . $e->getMessage() . PHP_EOL;
50}
51
52try {
53	$heap->top();
54}
55catch (Exception $e) {
56	echo "Corruption Exception: " . $e->getMessage() . PHP_EOL;
57}
58
59?>
60--EXPECT--
61Compare Exception: Compare exception
62Corruption Exception: Heap is corrupted, heap properties are no longer ensured.