Use assertions

Author: mevdschee

tests/Math/Adder.php

@@ -8,7 +8,8 @@ class Adder
 { 
     public static function add($a, $b):int 
     { 
+        $c = $a + $b;
         throw new Exception("This method should be mocked!");
-        return $a+$b; 
+        return $c; 
     } 
 }