Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in E:\xampp\htdocs\vendor\symfony\event-dispatcher\Tests\Debug\WrappedListenerTest.php:19 Stack trace: #0 {main} thrown in E:\xampp\htdocs\vendor\symfony\event-dispatcher\Tests\Debug\WrappedListenerTest.php on line 19