Fatal error: Uncaught Error: Class 'PHPUnit_Framework_TestCase' not found in /var/www/html/php7cookbook/source/chapter09/expressive/test/AppTest/Action/PingActionTest.php:9 Stack trace: #0 {main} thrown in /var/www/html/php7cookbook/source/chapter09/expressive/test/AppTest/Action/PingActionTest.php on line 9