createRegistry example

use Symfony\Component\ExpressionLanguage\ExpressionLanguage;
use Symfony\Component\ExpressionLanguage\SyntaxError;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpKernel\ControllerMetadata\ArgumentMetadata;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;

class EntityValueResolverTest extends TestCase
{
    public function testResolveWithoutClass()
    {
        $manager = $this->getMockBuilder(ObjectManager::class)->getMock();
        $registry = $this->createRegistry($manager);
        $resolver = new EntityValueResolver($registry);

        $request = new Request();
        $argument = new ArgumentMetadata('arg', null, false, false, null);

        $this->assertSame([], $resolver->resolve($request, $argument));
    }

    public function testResolveWithoutAttribute()
    {
        $manager = $this->getMockBuilder(ObjectManager::class)->getMock();