Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\laragon\www\Clinic\vendor\phpdocumentor\graphviz\tests\phpDocumentor\GraphViz\Test\GraphTest.php:36 Stack trace: #0 {main} thrown in C:\laragon\www\Clinic\vendor\phpdocumentor\graphviz\tests\phpDocumentor\GraphViz\Test\GraphTest.php on line 36