function execute_filter_chain($context, $t)
{
    $filterChain = new sfFilterChain();
    $filter = new lastTestFilter();
    $filter->response = $context->response;
    $filter->initialize($context);
    $filterChain->register($filter);
    $filter = new sfCommonFilter();
    $filter->initialize($context);
    $filterChain->register($filter);
    $filter = new firstTestFilter();
    $filter->response = $context->response;
    $filter->initialize($context);
    $filterChain->register($filter);
    $filterChain->execute();
    $dom = new DomDocument('1.0', 'UTF-8');
    $dom->validateOnParse = true;
    $dom->loadHTML($context->response->getContent());
    $selector = new sfDomCssSelector($dom);
    return $selector;
}
        // sfFlashFilter has executed no code
        // register some flash from previous request
        $user->setAttribute('previous_request', 'foo', 'symfony/flash');
        $user->setAttribute('every_request', 'foo', 'symfony/flash');
        $filterChain->execute();
        // sfFlashFilter has executed all its code
        $t->ok(!$user->hasAttribute('previous_request', 'symfony/flash'), '->execute() removes flash variables that have been tagged before');
        $t->ok(!$user->hasAttribute('previous_request', 'symfony/flash/remove'), '->execute() removes flash variables that have been tagged before');
        $t->is($user->getAttribute('this_request', null, 'symfony/flash'), 'foo', '->execute() keeps current request flash variables');
        $t->is($user->getAttribute('every_request', null, 'symfony/flash'), 'foo', '->execute() flash variables that have been overriden in current request');
    }
}
$context = new sfContext();
$user = new myUser();
$user->initialize($context);
$context->user = $user;
$filterChain = new sfFilterChain();
$filter = new lastTestFilter();
$filter->t = $t;
$filter->user = $user;
$filter->initialize($context);
$filterChain->register($filter);
$filter = new sfFlashFilter();
$filter->initialize($context);
$filterChain->register($filter);
$filter = new firstTestFilter();
$filter->t = $t;
$filter->user = $user;
$filter->initialize($context);
$filterChain->register($filter);
$filterChain->execute();