fixes before build

test/catalog_test.dart

@@ -52,6 +52,25 @@ void main() {
     });
   });
 
+  test('getLastTripSupermarkets lists unique stores newest first', () async {
+    final repository = memoryRepository();
+    await repository.saveShop(
+      supermarket: 'Jumbo',
+      shoppedAt: DateTime(2026, 8, 1),
+      items: [LineItem(id: '1', name: 'Milk', price: 1.5)],
+    );
+    await repository.saveShop(
+      supermarket: 'Albert Heijn',
+      shoppedAt: DateTime(2026, 8, 12),
+      items: [LineItem(id: '2', name: 'Bread', price: 2)],
+    );
+
+    expect(await repository.getLastTripSupermarkets(), [
+      'Albert Heijn',
+      'Jumbo',
+    ]);
+  });
+
   test('deleting all products leaves shopping trips in place', () async {
     final repository = memoryRepository();
     await repository.saveShop(

test/supermarket_test.dart

@@ -1,4 +1,5 @@
 import 'package:flutter_test/flutter_test.dart';
+import 'package:receipity/models/supermarket.dart';
 import 'package:receipity/utils/supermarkets.dart';
 
 void main() {
@@ -20,4 +21,32 @@ void main() {
   test('returns null when no supermarket is present', () {
     expect(detectSupermarket('Milk 1.50\nBread 2.00'), isNull);
   });
+
+  test('sortStoresByLastTrip puts the latest trip store first', () {
+    const jumbo = Supermarket(id: 1, name: 'Jumbo', colorValue: 1, sortOrder: 0);
+    const lidl = Supermarket(id: 2, name: 'Lidl', colorValue: 2, sortOrder: 1);
+    const ah = Supermarket(
+      id: 3,
+      name: 'Albert Heijn',
+      colorValue: 3,
+      sortOrder: 2,
+    );
+
+    final afterJumbo = sortStoresByLastTrip([jumbo, lidl, ah], ['Jumbo']);
+    expect(afterJumbo.map((store) => store.name), [
+      'Jumbo',
+      'Lidl',
+      'Albert Heijn',
+    ]);
+
+    final afterAh = sortStoresByLastTrip(
+      [jumbo, lidl, ah],
+      ['Albert Heijn', 'Jumbo'],
+    );
+    expect(afterAh.map((store) => store.name), [
+      'Albert Heijn',
+      'Jumbo',
+      'Lidl',
+    ]);
+  });
 }