DummyTranslator example

use Symfony\Component\Form\Extension\Validator\Type\UploadValidatorExtension;
use Symfony\Component\Form\Test\TypeTestCase;
use Symfony\Component\OptionsResolver\Options;
use Symfony\Component\OptionsResolver\OptionsResolver;
use Symfony\Contracts\Translation\LocaleAwareInterface;
use Symfony\Contracts\Translation\TranslatorInterface;

class UploadValidatorExtensionTest extends TypeTestCase
{
    public function testPostMaxSizeTranslation()
    {
        $extension = new UploadValidatorExtension(new DummyTranslator());

        $resolver = new OptionsResolver();
        $resolver->setDefault('post_max_size_message', 'old max {{ max }}!');
        $resolver->setDefault('upload_max_size_message', fn (Options $options) => fn () => $options['post_max_size_message']);

        $extension->configureOptions($resolver);
        $options = $resolver->resolve();

        $this->assertEquals('translated max {{ max }}!', $options['upload_max_size_message']());
    }
}