/**
* Runs a command and returns it output
*
* @param \Symfony\Component\HttpKernel\Client $client
* @param $command
*
* @return string|\Symfony\Component\Console\Output\StreamOutput
*/
public function runCommand(Client $client, $command)
{
$application = new Application($client->getKernel());
$application->setAutoExit(false);
$fp = tmpfile();
$input = new StringInput($command);
$output = new StreamOutput($fp);
$application->run($input, $output);
fseek($fp, 0);
$output = '';
while (!feof($fp)) {
$output = fread($fp, 4096);
}
fclose($fp);
return $output;
}