fix: restore room occupancy lost to case-sensitive xml attribute lookup

tests/Service/BookingSummaryAssemblerTest.php

@@ -70,6 +70,23 @@ class BookingSummaryAssemblerTest extends TestCase
         $this->assertSame(2, $summary->participantCount);
     }
 
+    public function testCreateStep1CountsRoomsWithUnknownOccupancyAsZero(): void
+    {
+        $service = $this->createService();
+        $bookingDto = $this->createBookingDto();
+        $bookingDto->travel->rooms[12] = $this->createRoom(12, null);
+        $bookingDto->currentStep = 1;
+        $bookingDto->roomSelections = [
+            $this->createRoomSelection(10, 1),
+            $this->createRoomSelection(12, 2),
+        ];
+
+        $summary = $service->getSummaryData($bookingDto);
+
+        // 1×2 for the known room; the room without occupancy contributes nothing.
+        $this->assertSame(2, $summary->participantCount);
+    }
+
     private function createService(): BookingSummaryAssembler
     {
         $priceCalculator = $this->createStub(BookingPriceCalculator::class);
@@ -107,7 +124,7 @@ class BookingSummaryAssemblerTest extends TestCase
         return new BookingDto($travel, 157047);
     }
 
-    private function createRoom(int $id, int $maxPax): Room
+    private function createRoom(int $id, ?int $maxPax): Room
     {
         $room = new Room();
         $room->id = $id;

tests/Service/RoomAssignerTest.php

@@ -272,6 +272,32 @@ class RoomAssignerTest extends TestCase
         self::assertNull($bookingDto->participants[1]->assignedRoomId);
     }
 
+    #[Test]
+    public function assignParticipantsToRoomsFallsBackToOneBedWhenOccupancyIsUnknown(): void
+    {
+        $bookingDto = $this->createBookingDtoWithRoomSelections([
+            ['roomId' => 100, 'quantity' => 2, 'capacity' => 1],
+        ]);
+
+        $bookingDto->participants = [
+            new ParticipantDto(),
+            new ParticipantDto(),
+        ];
+
+        $room = new Room();
+        $room->id = 100;
+        $room->minPax = null;
+        $room->available = 10;
+        $room->status = Constants::STATUS_AVAILABLE;
+
+        $bookingDto->travel->rooms = [$room];
+
+        $this->service->assignParticipantsToRooms($bookingDto);
+
+        self::assertSame(100, $bookingDto->participants[0]->assignedRoomId);
+        self::assertSame(100, $bookingDto->participants[1]->assignedRoomId);
+    }
+
     private function createBookingDtoWithRoomSelections(array $selections): BookingDto
     {
         $travel = new Travel();

tests/Service/RoomPricingCalculatorTest.php

@@ -247,6 +247,31 @@ class RoomPricingCalculatorTest extends TestCase
         $this->assertEquals(458.0, $result[0]['totalPrice']);
     }
 
+    public function testCalculateRoomPricingFallsBackToOneParticipantWhenOccupancyIsUnknown(): void
+    {
+        $room = new Room();
+        $room->id = 4;
+        $room->price = 419.0;
+        $room->minPax = null;
+        $room->label = 'Bett im Mehrbettzimmer';
+
+        $travel = new Travel();
+        $travel->rooms = [$room];
+
+        $roomSelection = new RoomSelectionDto();
+        $roomSelection->id = 4;
+        $roomSelection->quantity = 2;
+
+        $bookingDto = new BookingDto($travel, 1);
+        $bookingDto->roomSelections = [$roomSelection];
+
+        $result = $this->calculator->calculateRoomPricing($bookingDto, RoomPricingCalculator::PRICING_MODE_SELECTION);
+
+        $this->assertCount(1, $result);
+        $this->assertEquals(2, $result[0]['participantCount']);
+        $this->assertEquals(838.0, $result[0]['totalPrice']);
+    }
+
     public function testCalculateRoomPricingInEditModeUsesStoredIndividualPrices(): void
     {
         $travel = new Travel();