Fatal error: Uncaught Error: Class 'tests\TestCase' not found in E:\xampp\htdocs\www\TT\ThinkPHP\vendor\topthink\think-image\tests\TextTest.php:15 Stack trace: #0 {main} thrown in E:\xampp\htdocs\www\TT\ThinkPHP\vendor\topthink\think-image\tests\TextTest.php on line 15