xref: /PHP-7.0/ext/spl/tests/heap_corruption.phpt (revision 0686b444) 
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$heap->allow_compare = false;
44
45var_dump($heap->isCorrupted());
46
47try {
48	$heap->extract();
49}
50catch (Exception $e) {
51	echo "Compare Exception: " . $e->getMessage() . PHP_EOL;
52}
53
54try {
55	$heap->top();
56}
57catch (Exception $e) {
58	echo "Corruption Exception: " . $e->getMessage() . PHP_EOL;
59}
60
61var_dump($heap->isCorrupted());
62$heap->recoverFromCorruption();
63var_dump($heap->isCorrupted());
64?>
65--EXPECT--
66bool(false)
67Compare Exception: Compare exception
68Corruption Exception: Heap is corrupted, heap properties are no longer ensured.
69bool(true)
70bool(false)