How to use the All Validator

DemoController.php

<?php

use Symfony\Component\Validator\Constraints\Email;
use Symfony\Component\Validator\Constraints\All;

// This is reduced to the bare minimum. Missing Namespace and other imports 
class DemoController extends Controller
{
    function testAction()
    {
        $testArr = array(
            '[email protected]',
            'invalid@gmail'
        );

        $emailConstraint = new Email();
        $collectionConstraint = new All(array($emailConstraint));

        $errorList = $this->get('validator')->validateValue(
            $testArr,
            $collectionConstraint
        );

        echo "<pre>";
        print_r($errorList);
    }
}

result.txt

Symfony\Component\Validator\ConstraintViolationList Object
(
    [violations:protected] => Array
        (
            [0] => Symfony\Component\Validator\ConstraintViolation Object
                (
                    [messageTemplate:protected] => This value is not a valid email address.
                    [messageParameters:protected] => Array
                        (
                            [{{ value }}] => invalid@gmail
                        )

                    [messagePluralization:protected] => 
                    [root:protected] => 
                    [propertyPath:protected] => [1]
                    [invalidValue:protected] => invalid@gmail
                    [code:protected] => 
                )

        )

)