Fatal error: Uncaught Error: Class 'PHPUnit_Framework_TestCase' not found in E:\xampp\htdocs\www\TT\ThinkPHP\vendor\topthink\think-image\tests\TestCase.php:16 Stack trace: #0 {main} thrown in E:\xampp\htdocs\www\TT\ThinkPHP\vendor\topthink\think-image\tests\TestCase.php on line 16