Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in E:\xampp\htdocs\stms\vendor\hamcrest\hamcrest-php\tests\Hamcrest\UtilTest.php:6 Stack trace: #0 {main} thrown in E:\xampp\htdocs\stms\vendor\hamcrest\hamcrest-php\tests\Hamcrest\UtilTest.php on line 6