php-src/Zend/tests/weakrefs/weakmap_weakness.phpt

--TEST--
The weak part of the WeakMap
--FILE--
<?php

$map = new WeakMap;

// This is doing to be inserted into the map and immediately removed again
$map[new stdClass] = 1;
var_dump($map);

$obj = new stdClass;
$map[$obj] = 2;
var_dump($map);

unset($obj);
var_dump($map);

echo "\nDestructor in WeakMap value:\n";
$obj = new stdClass;
$map[$obj] = new class {
    public function __destruct() {
        echo "Dtor!\n";
    }
};

echo "Before unset:\n";
unset($obj);
echo "After unset:\n";
var_dump($map);

echo "\nDestroying map with live object:\n";
$obj = new stdClass;
$map[$obj] = 3;
unset($map);
var_dump($obj);

echo "\nObject freed by GC:\n";
$map = new WeakMap;
$obj = new stdClass;
$obj->obj = $obj;
$map[$obj] = 4;
unset($obj);
var_dump($map);
gc_collect_cycles();
var_dump($map);

echo "\nStoring object as own value:\n";
$map = new WeakMap;
$obj = new stdClass;
$map[$obj] = $obj;
unset($obj);
var_dump($map);
unset($map);

echo "\nStoring map in itself:\n";
$map = new WeakMap;
$map[$map] = $map;
var_dump($map);
unset($map);

?>
--EXPECT--
object(WeakMap)#1 (0) {
}
object(WeakMap)#1 (1) {
  [0]=>
  array(2) {
    ["key"]=>
    object(stdClass)#2 (0) {
    }
    ["value"]=>
    int(2)
  }
}
object(WeakMap)#1 (0) {
}

Destructor in WeakMap value:
Before unset:
Dtor!
After unset:
object(WeakMap)#1 (0) {
}

Destroying map with live object:
object(stdClass)#2 (0) {
}

Object freed by GC:
object(WeakMap)#1 (1) {
  [0]=>
  array(2) {
    ["key"]=>
    object(stdClass)#3 (1) {
      ["obj"]=>
      *RECURSION*
    }
    ["value"]=>
    int(4)
  }
}
object(WeakMap)#1 (0) {
}

Storing object as own value:
object(WeakMap)#3 (1) {
  [0]=>
  array(2) {
    ["key"]=>
    object(stdClass)#1 (0) {
    }
    ["value"]=>
    object(stdClass)#1 (0) {
    }
  }
}

Storing map in itself:
object(WeakMap)#3 (1) {
  [0]=>
  array(2) {
    ["key"]=>
    *RECURSION*
    ["value"]=>
    *RECURSION*
  }
}