add traction import export

test/pages/trips_page_test.dart

@@ -0,0 +1,64 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+import 'package:mileograph_flutter/components/pages/trips.dart';
+import 'package:mileograph_flutter/services/distance_unit_service.dart';
+
+import '../helpers/fake_services.dart';
+import '../helpers/test_app.dart';
+import '../helpers/test_data.dart';
+
+void main() {
+  TestWidgetsFlutterBinding.ensureInitialized();
+
+  setUpAll(() {
+    SharedPreferences.setMockInitialValues({});
+  });
+
+  testWidgets('Trips page shows trip details', (tester) async {
+    final data = FakeDataService()
+      ..tripDetailsValue = TestData.tripDetails
+      ..tripListValue = TestData.tripSummaries;
+    final auth = FakeAuthService(api: FakeApiService());
+    final distanceUnits = FakeDistanceUnitService(
+      unitOverride: DistanceUnit.milesDecimal,
+    );
+
+    await tester.pumpWidget(
+      buildTestApp(
+        child: const TripsPage(),
+        dataService: data,
+        authService: auth,
+        distanceUnitService: distanceUnits,
+      ),
+    );
+    await tester.pumpAndSettle();
+
+    expect(find.text('Trips'), findsOneWidget);
+    expect(find.text('North Run'), findsOneWidget);
+    expect(find.textContaining('mi'), findsWidgets);
+  });
+
+  testWidgets('Trips page shows empty state', (tester) async {
+    final data = FakeDataService()
+      ..tripDetailsValue = []
+      ..tripListValue = []
+      ..isTripDetailsLoadingValue = false;
+    final auth = FakeAuthService(api: FakeApiService());
+
+    await tester.pumpWidget(
+      buildTestApp(
+        child: const TripsPage(),
+        dataService: data,
+        authService: auth,
+      ),
+    );
+    await tester.pumpAndSettle();
+
+    expect(find.text('No trips yet'), findsOneWidget);
+    expect(
+      find.text('Use the Add entry flow to start grouping legs into trips.'),
+      findsOneWidget,
+    );
+  });
+}