Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\Apache24_x64\htdocs\ipad\vendor\symfony\http-foundation\Tests\Test\Constraint\ResponseHasHeaderTest.php:20 Stack trace: #0 {main} thrown in C:\Apache24_x64\htdocs\ipad\vendor\symfony\http-foundation\Tests\Test\Constraint\ResponseHasHeaderTest.php on line 20