public function setUp()
{
$session = \ElggSession::getMock();
_elgg_services()->setValue('session', $session);
_elgg_services()->session->start();
$this->handler = _elgg_services()->serveFileHandler;
$file = new \ElggFile();
$file->owner_guid = 1;
$file->setFilename("foobar.txt");
$this->file = $file;
}