Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /media/jean/learning/huagai/drupal/vendor/symfony/validator/Test/ConstraintValidatorTestCase.php:46 Stack trace: #0 {main} thrown in /media/jean/learning/huagai/drupal/vendor/symfony/validator/Test/ConstraintValidatorTestCase.php on line 46