Doctrine schema validation in a PHPUnit test

SchemaValidationTest.php

<?php
/**
 * @author Matthieu Napoli
 * @link http://en.mnapoli.fr/doctrine-schema-validation-in-a-phpunit-test/
 * @license WTFPL - Do What The Fuck You Want To Public License (http://sam.zoy.org/wtfpl/)
 */

use Doctrine\ORM\Tools\SchemaValidator;

/**
 * Doctrine schema validation
 */
class SchemaValidationTest extends PHPUnit_Framework_TestCase
{

    /**
     * @var \Doctrine\ORM\EntityManager
     */
    protected $entityManager;

    public function setUp() {
        $this->entityManager = /* inject your entity manager here */;
    }

    public function testValidateSchema() {
        $validator = new SchemaValidator($this->entityManager);
        $errors = $validator->validateMapping();

        if (count($errors) > 0) {
            $message = PHP_EOL;
            foreach ($errors as $class => $classErrors) {
                $message .= "- " . $class . ":" . PHP_EOL . implode(PHP_EOL, $classErrors) . PHP_EOL . PHP_EOL;
            }
            $this->fail($message);
        }
    }

}