Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/sgcomcom/sample.sgcom.com.lk/vendor/sebastian/diff/tests/DifferTest.php:24 Stack trace: #0 {main} thrown in /home/sgcomcom/sample.sgcom.com.lk/vendor/sebastian/diff/tests/DifferTest.php on line 24