Fatal error: Uncaught Error: Class "Ratchet\AbstractMessageComponentTestCase" not found in C:\xampp\htdocs\hannoole\schol\vendor\cboden\ratchet\tests\unit\Session\SessionComponentTest.php:12 Stack trace: #0 {main} thrown in C:\xampp\htdocs\hannoole\schol\vendor\cboden\ratchet\tests\unit\Session\SessionComponentTest.php on line 12