Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in E:\www\doctor\v1.0\mvc\lib\aliyun-dysms-php-sdk\api_sdk\tests\Core\DefaultAcsClientTest.php:11 Stack trace: #0 {main} thrown in E:\www\doctor\v1.0\mvc\lib\aliyun-dysms-php-sdk\api_sdk\tests\Core\DefaultAcsClientTest.php on line 11