Merge branch '6.2' into 6.3

* 6.2:
  [Notifier] Document Notifier options in README files 5.4
  fix exception wording
  [Security] Test `CsrfTokenClearingLogoutListener` with stateless logout

Author: nicolas-grekas

Tests/EventListener/CsrfTokenClearingLogoutListenerTest.php

@@ -0,0 +1,36 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Security\Http\Tests\EventListener;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\HttpFoundation\Exception\SessionNotFoundException;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\RequestStack;
+use Symfony\Component\Security\Csrf\TokenStorage\SessionTokenStorage;
+use Symfony\Component\Security\Http\Event\LogoutEvent;
+use Symfony\Component\Security\Http\EventListener\CsrfTokenClearingLogoutListener;
+
+class CsrfTokenClearingLogoutListenerTest extends TestCase
+{
+    public function testSkipsClearingSessionTokenStorageOnStatelessRequest()
+    {
+        try {
+            (new CsrfTokenClearingLogoutListener(
+                new SessionTokenStorage(new RequestStack())
+            ))->onLogout(new LogoutEvent(new Request(), null));
+        } catch (SessionNotFoundException) {
+            $this->fail('clear() must not be called if the request is not associated with a session instance');
+        }
+
+        $this->addToAssertionCount(1);
+    }
+}