Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/szfwxvyz/sms/sms-ito/vendor/dasprid/enum/test/NullValueTest.php:12 Stack trace: #0 {main} thrown in /home/szfwxvyz/sms/sms-ito/vendor/dasprid/enum/test/NullValueTest.php on line 12