Fix tests when security-http 5.4 uses security-core 6.0

Author: jderusse

Tests/Firewall/ContextListenerTest.php

@@ -546,7 +546,7 @@ public function supportsClass($class): bool
     }
 }
 
-class CustomToken implements TokenInterface
+abstract class BaseCustomToken implements TokenInterface
 {
     private $user;
     private $roles;
@@ -638,11 +638,24 @@ public function hasAttribute(string $name): bool
         return false;
     }
 
-    public function getAttribute(string $name)
+    public function setAttribute(string $name, $value)
     {
     }
+}
 
-    public function setAttribute(string $name, $value)
+if (\PHP_VERSION_ID >= 80000) {
+    class CustomToken extends BaseCustomToken
     {
+        public function getAttribute(string $name): mixed
+        {
+            return null;
+        }
+    }
+} else {
+    class CustomToken extends BaseCustomToken
+    {
+        public function getAttribute(string $name)
+        {
+        }
     }
 }