Fatal error: Uncaught Error: Class "PHPUnit_Framework_TestCase" not found in /home/v2appclykk/public_html/routing_management/vendor/sngrl/php-firebase-cloud-messaging/tests/PhpFirebaseCloudMessagingTestCase.php:4 Stack trace: #0 {main} thrown in /home/v2appclykk/public_html/routing_management/vendor/sngrl/php-firebase-cloud-messaging/tests/PhpFirebaseCloudMessagingTestCase.php on line 4