fix: refresh live room availability during create flow

tests/Controller/Api/TravelControllerTest.php

@@ -0,0 +1,85 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\Controller\Api;
+
+use App\BusProNet\ApiClient;
+use App\BusProNet\Model\BaseData;
+use App\BusProNet\Model\Notification;
+use App\BusProNet\Model\Room;
+use App\Controller\Api\TravelController;
+use App\Service\TravelDataProvider;
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\DependencyInjection\Container;
+use Symfony\Component\Serializer\Encoder\JsonEncoder;
+use Symfony\Component\Serializer\Mapping\Factory\ClassMetadataFactory;
+use Symfony\Component\Serializer\Mapping\Loader\AttributeLoader;
+use Symfony\Component\Serializer\Normalizer\DateTimeNormalizer;
+use Symfony\Component\Serializer\Normalizer\ObjectNormalizer;
+use Symfony\Component\Serializer\Serializer;
+
+class TravelControllerTest extends TestCase
+{
+    public function testHotelAvailabilityOnlySerializesApiGroupFields(): void
+    {
+        $room = new Room();
+        $room->id = 1;
+        $room->label = 'Doppelzimmer';
+        $room->status = 'Frei';
+        $room->available = 2;
+        $room->price = 199.0;
+        // booking-only fields that must NOT appear in the API response
+        $room->dateFrom = new \DateTimeImmutable('2030-01-01');
+        $room->totalCount = 42;
+        $room->board = 'Halbpension';
+
+        $apiClient = $this->createMock(ApiClient::class);
+        $apiClient->expects($this->once())
+            ->method('getHotelAvailability')
+            ->willReturn(new BaseData([1 => $room]));
+
+        $controller = new TravelController($apiClient, $this->createMock(TravelDataProvider::class));
+
+        $classMetadataFactory = new ClassMetadataFactory(new AttributeLoader());
+        $serializer = new Serializer(
+            [new DateTimeNormalizer(), new ObjectNormalizer($classMetadataFactory)],
+            [new JsonEncoder()],
+        );
+        $container = new Container();
+        $container->set('serializer', $serializer);
+        $controller->setContainer($container);
+
+        $response = $controller->hotelAvailability(12345, 67890, new \DateTimeImmutable('2030-01-06'));
+        $payload = json_decode((string) $response->getContent(), true, 512, JSON_THROW_ON_ERROR);
+
+        $roomPayload = $payload['1'] ?? null;
+        $this->assertNotNull($roomPayload);
+        $this->assertSame('Frei', $roomPayload['status']);
+        $this->assertArrayNotHasKey('dateFrom', $roomPayload);
+        $this->assertArrayNotHasKey('totalCount', $roomPayload);
+        $this->assertArrayNotHasKey('board', $roomPayload);
+    }
+
+    public function testHotelAvailabilityReturnsErrorPayloadForApiNotification(): void
+    {
+        $apiClient = $this->createMock(ApiClient::class);
+        $apiClient->expects($this->once())
+            ->method('getHotelAvailability')
+            ->willReturn(new Notification(999, 'Hotel not found'));
+
+        $controller = new TravelController($apiClient, $this->createMock(TravelDataProvider::class));
+
+        $container = new Container();
+        $container->set('serializer', new Serializer(
+            [new ObjectNormalizer(new ClassMetadataFactory(new AttributeLoader()))],
+            [new JsonEncoder()],
+        ));
+        $controller->setContainer($container);
+
+        $response = $controller->hotelAvailability(12345, 67890, new \DateTimeImmutable('2030-01-06'));
+        $payload = json_decode((string) $response->getContent(), true, 512, JSON_THROW_ON_ERROR);
+
+        $this->assertSame(['error' => 'Hotel not found', 'type' => 'api_error'], $payload);
+    }
+}