Test All validation constraint (symfony2)

User.php

<?php

namespace Acme\DemoBundle\Entity;

use Doctrine\ORM\Mapping as ORM;
use Symfony\Component\Validator\Constraints as Assert;


/**
 * User
 *
 * @ORM\Table(name="User")
 */
class User
{
    /**
     * @var integer
     *
     * @ORM\Column(name="id", type="integer")
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    private $id;

    /**
     * @var string
     *
     * @ORM\Column(name="username", type="string")
     * @Assert\NotBlank()
     */
    private $username;

    /**
     * @var array
     *
     * @ORM\Column(name="email_list", type="array")
     * @Assert\NotBlank()
     * @Assert\Count(
     *      min = "1",
     *      max = "100",
     *      minMessage = "You must specify at least one email",
     *      maxMessage = "You cannot specify more than {{ limit }} emails"
     * )
     * @Assert\All( constraints = {
     *    @Assert\NotBlank(),
     *    @Assert\Email(
     *        message = "The email '{{ value }}' is not a valid email.",
     *        checkMX = true
     *    )
     * })
     */
    private $emailList = array();

    public function addEmail($email)
    {
        $this->emailList[] = $email;
    }

    /**
     * @return array
     */
    public function getEmailList()
    {
        return $this->emailList;
    }

    /**
     * Get id
     *
     * @return integer
     */
    public function getId()
    {
        return $this->id;
    }

    /**
     * @param string $username
     */
    public function setUsername($username)
    {
        $this->username = $username;
    }

    /**
     * @return string
     */
    public function getUsername()
    {
        return $this->username;
    }
}

WelcomeController.php

<?php

namespace Acme\DemoBundle\Controller;

use Acme\DemoBundle\Entity\User;
use Symfony\Bundle\FrameworkBundle\Controller\Controller;

class WelcomeController extends Controller
{
    public function indexAction()
    {
        $user = new User();
        $user->setUsername('Foobar');
        $user->addEmail('foo');
        var_dump($this->get('validator')->validate($user));
        exit();
    }
}