Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\xampp\htdocs\hshs\vendor\morilog\jalali\tests\HelperTest.php:8 Stack trace: #0 {main} thrown in C:\xampp\htdocs\hshs\vendor\morilog\jalali\tests\HelperTest.php on line 8