Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in C:\MANTUM\xampp2\htdocs\MNT\ventasvariables\libreria\vendor\microsoft\microsoft-graph\tests\Functional\MailTest.php:6
Stack trace:
#0 {main}
  thrown in C:\MANTUM\xampp2\htdocs\MNT\ventasvariables\libreria\vendor\microsoft\microsoft-graph\tests\Functional\MailTest.php on line 6