fix: enable bookings without ski passes

tests/Form/Service/CreateFieldStateProviderTest.php

@@ -9,7 +9,9 @@ use App\BusProNet\Model\Travel;
 use App\Form\Model\BookingDto;
 use App\Form\Model\ParticipantDto;
 use App\Form\Service\CreateFieldStateProvider;
+use App\Form\Service\ServiceAgeEvaluator;
 use App\Service\ParticipantEligibilityChecker;
+use App\Service\ServiceAvailabilityCalculator;
 use PHPUnit\Framework\TestCase;
 
 /**
@@ -24,7 +26,10 @@ class CreateFieldStateProviderTest extends TestCase
 
     protected function setUp(): void
     {
-        $this->provider = new CreateFieldStateProvider(new ParticipantEligibilityChecker());
+        $this->provider = new CreateFieldStateProvider(new ParticipantEligibilityChecker(
+            new ServiceAgeEvaluator(),
+            new ServiceAvailabilityCalculator()
+        ));
     }
 
     public function testDependentInsuranceFieldHidesWhenApplicantSelectsFamilyInsuranceThenReappearsAfterSwitch(): void

tests/Form/Service/ParticipantFieldOptionsProviderSkiPassAvailabilityTest.php

@@ -134,6 +134,17 @@ class ParticipantFieldOptionsProviderSkiPassAvailabilityTest extends TestCase
         }
     }
 
+    public function testTravelWithoutSkiPassesRendersNoField(): void
+    {
+        $bookingDto = $this->createBookingDto([]);
+
+        $this->assertSame(
+            [],
+            $this->provider->getFieldOptions('skiPass', $bookingDto, 0),
+            'The field has to be absent entirely, not rendered with an empty choice list'
+        );
+    }
+
     /** @return int[] */
     private function getSkiPassChoiceIds(BookingDto $bookingDto): array
     {