ValidatorCacheWarmer example

public function testWarmUp()
    {
        $validatorBuilder = new ValidatorBuilder();
        $validatorBuilder->addXmlMapping(__DIR__.'/../Fixtures/Validation/Resources/person.xml');
        $validatorBuilder->addYamlMapping(__DIR__.'/../Fixtures/Validation/Resources/author.yml');
        $validatorBuilder->addMethodMapping('loadValidatorMetadata');
        $validatorBuilder->enableAttributeMapping();

        $file = sys_get_temp_dir().'/cache-validator.php';
        @unlink($file);

        $warmer = new ValidatorCacheWarmer($validatorBuilder, $file);
        $warmer->warmUp(\dirname($file));

        $this->assertFileExists($file);

        $arrayPool = new PhpArrayAdapter($file, new NullAdapter());

        $this->assertTrue($arrayPool->getItem('Symfony.Bundle.FrameworkBundle.Tests.Fixtures.Validation.Person')->isHit());
        $this->assertTrue($arrayPool->getItem('Symfony.Bundle.FrameworkBundle.Tests.Fixtures.Validation.Author')->isHit());
    }

    public function testWarmUpWithAnnotations()
    {