Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in I:\www\pvcStruct - corrupt\tests\integration_tests\treesearch\SearchDepthFirstPostorderTest.php:23 Stack trace: #0 {main} thrown in I:\www\pvcStruct - corrupt\tests\integration_tests\treesearch\SearchDepthFirstPostorderTest.php on line 23