MediaTestConstraintValidator.php in Drupal 8
File
core/modules/media/tests/modules/media_test_source/src/Plugin/Validation/Constraint/MediaTestConstraintValidator.php
View source
<?php
namespace Drupal\media_test_source\Plugin\Validation\Constraint;
use Drupal\Core\Entity\EntityInterface;
use Drupal\Core\Field\FieldItemListInterface;
use Symfony\Component\Validator\Constraint;
use Symfony\Component\Validator\ConstraintValidator;
class MediaTestConstraintValidator extends ConstraintValidator {
public function validate($value, Constraint $constraint) {
if ($value instanceof EntityInterface) {
$string_to_test = $value
->label();
}
elseif ($value instanceof FieldItemListInterface) {
$string_to_test = $value->value;
}
else {
return;
}
if (strpos($string_to_test, 'love Drupal') === FALSE) {
$this->context
->addViolation($constraint->message);
}
}
}