Fatal error: Uncaught Error: Class 'TestCase' not found in C:\xampp\htdocs\ecommerce\php-sigep-master\tests\Services\DigitoVerificadorTest.php:3 Stack trace: #0 {main} thrown in C:\xampp\htdocs\ecommerce\php-sigep-master\tests\Services\DigitoVerificadorTest.php on line 3