Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in D:\xampp\htdocs\_runing\sales-manager-system\vendor\maennchen\zipstream-php\test\ZipStreamTest.php:28 Stack trace: #0 {main} thrown in D:\xampp\htdocs\_runing\sales-manager-system\vendor\maennchen\zipstream-php\test\ZipStreamTest.php on line 28