Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in D:\Apache24\www\sanqi\back-end\vendor\clearstream\xml-to-array\tests\XmlToArrayConverterTest.php:11 Stack trace: #0 {main} thrown in D:\Apache24\www\sanqi\back-end\vendor\clearstream\xml-to-array\tests\XmlToArrayConverterTest.php on line 11