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