Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in D:\xampp\htdocs\ssw_doc\vendor\setasign\fpdi\tests\functional\PdfParser\PdfParserTest.php:23 Stack trace: #0 {main} thrown in D:\xampp\htdocs\ssw_doc\vendor\setasign\fpdi\tests\functional\PdfParser\PdfParserTest.php on line 23