Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/edmedu/www/hana-edu.co.kr/sf4l/vendor/symfony/service-contracts/Test/ServiceLocatorTest.php:18 Stack trace: #0 {main} thrown in /home/edmedu/www/hana-edu.co.kr/sf4l/vendor/symfony/service-contracts/Test/ServiceLocatorTest.php on line 18