Fatal error: Uncaught Error: Class 'PHPUnit_Framework_TestCase' not found in D:\xampp\htdocs\erp_api\vendor\danielstjules\stringy\tests\CommonTest.php:5 Stack trace: #0 {main} thrown in D:\xampp\htdocs\erp_api\vendor\danielstjules\stringy\tests\CommonTest.php on line 5