Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in C:\xampp\htdocs\webservices\inovarservice-order\vendor\mike42\escpos-php\test\unit\EscposPrintBufferTest.php:15 Stack trace: #0 {main} thrown in C:\xampp\htdocs\webservices\inovarservice-order\vendor\mike42\escpos-php\test\unit\EscposPrintBufferTest.php on line 15