namespace Symfony\Component\Validator\Tests\Constraints;
use Symfony\Component\Validator\Constraints\IsNull;
use Symfony\Component\Validator\Constraints\IsNullValidator;
use Symfony\Component\Validator\Test\ConstraintValidatorTestCase;
class IsNullValidatorTest extends ConstraintValidatorTestCase
{ protected function createValidator(): IsNullValidator
{ return new IsNullValidator();
} public function testNullIsValid() { $this->validator->
validate(null,
new IsNull());
$this->
assertNoViolation();
} /**
* @dataProvider getInvalidValues
*/