--TEST--
SPL: ArrayObject::__construct basic usage.
--FILE--
<?php
echo "--> No arguments:\n";
var_dump(new ArrayObject());

echo "--> Object argument:\n";
$a = new stdClass;
$a->p = 'hello';
var_dump(new ArrayObject($a));

echo "--> Array argument:\n";
var_dump(new ArrayObject(array('key1' => 'val1')));

echo "--> Nested ArrayObject argument:\n";
var_dump(new ArrayObject(new ArrayObject($a)));
?>
--EXPECTF--
--> No arguments:
object(ArrayObject)#%d (0) {
}
--> Object argument:
object(ArrayObject)#%d (1) {
  ["p"]=>
  string(5) "hello"
}
--> Array argument:
object(ArrayObject)#%d (1) {
  ["key1"]=>
  string(4) "val1"
}
--> Nested ArrayObject argument:
object(ArrayObject)#%d (1) {
  ["p"]=>
  string(5) "hello"
}