Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in D:\php\WWW\scakxafxfgc.cccf.net\vendor\topthink\framework\tests\EnvTest.php:10 Stack trace: #0 {main} thrown in D:\php\WWW\scakxafxfgc.cccf.net\vendor\topthink\framework\tests\EnvTest.php on line 10