Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /newdata/stgdev/public_html/trisak.mwz/vendor/nicmart/tree/test/Unit/Visitor/PreOrderVisitorTest.php:23 Stack trace: #0 {main} thrown in /newdata/stgdev/public_html/trisak.mwz/vendor/nicmart/tree/test/Unit/Visitor/PreOrderVisitorTest.php on line 23