Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/corporatenwocp/public_html/vendor/solspace/craft-freeform/packages/plugin/tests/Unit/Library/Export/ExportJsonTest.php:17 Stack trace: #0 {main} thrown in /home/corporatenwocp/public_html/vendor/solspace/craft-freeform/packages/plugin/tests/Unit/Library/Export/ExportJsonTest.php on line 17