Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in C:\xampp\htdocs\vendor\donatj\phpuseragentparser\tests\UserAgentParserFunctionTest.php:3 Stack trace: #0 {main} thrown in C:\xampp\htdocs\vendor\donatj\phpuseragentparser\tests\UserAgentParserFunctionTest.php on line 3