Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in E:\xampp\htdocs\vendor\nikic\php-parser\test\PhpParser\LexerTest.php:7 Stack trace: #0 {main} thrown in E:\xampp\htdocs\vendor\nikic\php-parser\test\PhpParser\LexerTest.php on line 7