Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in I:\www\pvcMsg\vendor\pvc\frmtr\tests\range\FrmtrRangeTest.php:16 Stack trace: #0 {main} thrown in I:\www\pvcMsg\vendor\pvc\frmtr\tests\range\FrmtrRangeTest.php on line 16