<?php
/*
* This file is part of PHPUnit.
*
* (c) Sebastian Bergmann <sebastian@phpunit.de>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace PHPUnit\Framework;

use PHPUnit\Util\Filter;

/**
* Base class for all PHPUnit Framework exceptions.
*
* Ensures that exceptions thrown during a test run do not leave stray
* references behind.
*
* Every Exception contains a stack trace. Each stack frame contains the 'args'
* of the called function. The function arguments can contain references to
* instantiated objects. The references prevent the objects from being
* destructed (until test results are eventually printed), so memory cannot be
* freed up.
*
* With enabled process isolation, test results are serialized in the child
* process and unserialized in the parent process. The stack trace of Exceptions
* may contain objects that cannot be serialized or unserialized (e.g., PDO
* connections). Unserializing user-space objects from the child process into
* the parent would break the intended encapsulation of process isolation.
*
* @see http://fabien.potencier.org/article/9/php-serialization-stack-traces-and-exceptions
*/
class Exception extends \RuntimeException implements \PHPUnit\Exception
{
/**
* @var array
*/
protected $serializableTrace;

public function __construct($message = '', $code = 0, \Exception $previous = null)
{
parent::__construct($message, $code, $previous);

$this->serializableTrace = $this->getTrace();

foreach ($this->serializableTrace as $i => $call) {
unset($this->serializableTrace[$i]['args']);
}
}

/**
* Returns the serializable trace (without 'args').
*
* @return array
*/
public function getSerializableTrace()
{
return $this->serializableTrace;
}

/**
* @return string
*/
public function __toString()
{
$string = TestFailure::exceptionToString($this);

if ($trace = Filter::getFilteredStacktrace($this)) {
$string .= "\n" . $trace;
}

return $string;
}

public function __sleep()
{
return \array_keys(\get_object_vars($this));
}
}