Fix timezone attribute handling to store timezone name instead of object

Author: chapterjason

src/EventListener/TimezoneListener.php

@@ -48,14 +48,14 @@ private function setTimezone(Request $request): void
         if ($timezone = $request->attributes->get('_timezone')) {
             $this->timezoneManager->setTimezone($timezone);
         } else {
-            $request->attributes->set('_timezone', $this->timezoneManager->getTimezone());
+            $request->attributes->set('_timezone', $this->timezoneManager->getTimezone()->getName());
         }
 
     }
 
     private function setRouterContext(Request $request): void
     {
-        $this->router?->getContext()->setParameter('_timezone', $this->timezoneManager->getTimezone());
+        $this->router?->getContext()->setParameter('_timezone', $this->timezoneManager->getTimezone()->getName());
     }
 
     public static function getSubscribedEvents(): array

tests/EventListener/TimezoneListenerTest.php

@@ -34,11 +34,13 @@ public function testDefaultTimezone(): void
 
         // Act
         $client->request('GET', '/');
+        $request = $client->getRequest();
         $response = $client->getResponse();
 
         // Assert
         self::assertResponseStatusCodeSame(200, 'The response is not successful.');
         self::assertSame('["Asia\/Tokyo"]', $response->getContent(), 'The timezone is not set correctly.');
+        self::assertSame('Asia/Tokyo', $request->attributes->get('_timezone'));
     }
 
     public function testOverrideDefaultTimezone(): void
@@ -48,10 +50,13 @@ public function testOverrideDefaultTimezone(): void
 
         // Act
         $client->request('GET', '/override');
+        $request = $client->getRequest();
         $response = $client->getResponse();
 
         // Assert
         self::assertResponseStatusCodeSame(200, 'The response is not successful.');
         self::assertSame('["Europe\/Berlin"]', $response->getContent(), 'The timezone is not set correctly.');
+        self::assertSame('Europe/Berlin', $request->attributes->get('_timezone'));
+
     }
 }