Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in D:\xampp\htdocs\PARA ORGANOZAR\escpos-php-development\test\unit\FilePrintConnectorTest.php:4 Stack trace: #0 {main} thrown in D:\xampp\htdocs\PARA ORGANOZAR\escpos-php-development\test\unit\FilePrintConnectorTest.php on line 4