Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in D:\Apache24\www\baojie\back\vendor\symfony\translation\Test\ProviderFactoryTestCase.php:34 Stack trace: #0 {main} thrown in D:\Apache24\www\baojie\back\vendor\symfony\translation\Test\ProviderFactoryTestCase.php on line 34