Fatal error: Uncaught Error: Class 'PHPUnit_Framework_TestCase' not found in C:\xampp\htdocs\orus\vendor\spipu\html2pdf\Tests\Parsing\HtmlLexerTest.php:21 Stack trace: #0 {main} thrown in C:\xampp\htdocs\orus\vendor\spipu\html2pdf\Tests\Parsing\HtmlLexerTest.php on line 21