Fatal error: Uncaught Error: Class "SebastianBergmann\Comparator\ObjectComparator" not found in C:\wamp64\houda\vendor\sebastian\comparator\src\MockObjectComparator.php:22 Stack trace: #0 {main} thrown in C:\wamp64\houda\vendor\sebastian\comparator\src\MockObjectComparator.php on line 22