Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in D:\xampp7\htdocs\www\nbkm\show_bd\vendor\sebastian\diff\tests\DifferTest.php:24 Stack trace: #0 {main} thrown in D:\xampp7\htdocs\www\nbkm\show_bd\vendor\sebastian\diff\tests\DifferTest.php on line 24