Fatal error: Uncaught Error: Class 'PHPUnit_Framework_TestCase' not found in /home/app/htdocs/lidia/vendor/phpoffice/phpexcel/unitTests/Classes/PHPExcel/Worksheet/CellCollectionTest.php:3 Stack trace: #0 {main} thrown in /home/app/htdocs/lidia/vendor/phpoffice/phpexcel/unitTests/Classes/PHPExcel/Worksheet/CellCollectionTest.php on line 3