Symfony2 Validator Component

gist.php

<?php
namespace Acme\TutorialBundle\Command;

use Symfony\Bundle\FrameworkBundle\Command\ContainerAwareCommand;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\Validator\Validation;
use Symfony\Component\Validator\Constraints as Assert;

class TestCommand extends ContainerAwareCommand
{

    protected function configure()
    {
        $this->setName('acme:test');
    }

    protected function interact(InputInterface $input, OutputInterface $output)
    {
    }

    protected function getDialogHelper()
    {
        return $this->getHelperSet()->get('dialog');
    }
}