add test

compass_app/app/integration_test/app_booking_flow_test.dart

@@ -0,0 +1,145 @@
+import 'package:compass_app/config/dependencies.dart';
+import 'package:compass_app/data/repositories/auth/auth_repository.dart';
+import 'package:compass_app/main.dart';
+import 'package:compass_app/ui/activities/widgets/activities_screen.dart';
+import 'package:compass_app/ui/auth/login/widgets/login_screen.dart';
+import 'package:compass_app/ui/booking/widgets/booking_screen.dart';
+import 'package:compass_app/ui/core/ui/custom_checkbox.dart';
+import 'package:compass_app/ui/core/ui/home_button.dart';
+import 'package:compass_app/ui/home/widgets/home_screen.dart';
+import 'package:compass_app/ui/results/widgets/result_card.dart';
+import 'package:compass_app/ui/results/widgets/results_screen.dart';
+import 'package:compass_app/ui/search_form/widgets/search_form_guests.dart';
+import 'package:compass_app/ui/search_form/widgets/search_form_screen.dart';
+import 'package:compass_app/ui/search_form/widgets/search_form_submit.dart';
+import 'package:compass_app/utils/result.dart';
+import 'package:flutter/foundation.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:integration_test/integration_test.dart';
+import 'package:provider/provider.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+// mocked AuthRepository to control the authentication state in the test and trigger UI changes.
+class TestAuthRepository extends AuthRepository {
+  bool _authenticated = false;
+
+  @override
+  Future<bool> get isAuthenticated => Future.value(_authenticated);
+
+  @override
+  Future<Result<void>> login({
+    required String email,
+    required String password,
+  }) async {
+    _authenticated = true;
+    notifyListeners();
+    return const Result.ok(null);
+  }
+
+  @override
+  Future<Result<void>> logout() async {
+    _authenticated = false;
+    notifyListeners();
+    return const Result.ok(null);
+  }
+}
+
+void main() {
+  IntegrationTestWidgetsFlutterBinding.ensureInitialized();
+
+  group('end-to-end booking flow', () {
+    testWidgets(
+      'starts logged out, creates itinerary, and go back to home screen',
+      (tester) async {
+        // clears data to ensure the app starts logged out, then logs in with a test auth repository.
+        final sharedPreferences = await SharedPreferences.getInstance();
+        await sharedPreferences.clear();
+        final testAuthRepository = TestAuthRepository();
+
+        await tester.pumpWidget(
+          MultiProvider(
+            providers: [
+              ...providersLocal,
+              ChangeNotifierProvider<AuthRepository>.value(
+                value:
+                    testAuthRepository, // override the AuthRepository with our test implementation
+              ),
+            ],
+            child: const MainApp(),
+          ),
+        );
+        await tester.pumpAndSettle();
+
+        // Auth-gated entry with local data.
+        expect(find.byType(LoginScreen), findsOneWidget);
+        await tester.tap(find.text('Login'));
+        await tester.pumpAndSettle();
+
+        expect(find.byType(HomeScreen), findsOneWidget);
+
+        // Select create new booking
+        await tester.tap(find.byKey(const ValueKey(bookingButtonKey)));
+        await tester.pumpAndSettle();
+        expect(find.byType(SearchFormScreen), findsOneWidget);
+
+        // Search destinations screen
+        await tester.tap(find.text('Europe'), warnIfMissed: false);
+
+        await tester.tap(find.text('Add Dates'));
+        await tester.pumpAndSettle();
+        final tomorrow = DateTime.now().add(const Duration(days: 1)).day;
+        final nextDay = DateTime.now().add(const Duration(days: 2)).day;
+        await tester.tap(find.text(tomorrow.toString()).first);
+        await tester.pumpAndSettle();
+        await tester.tap(find.text(nextDay.toString()).first);
+        await tester.pumpAndSettle();
+        await tester.tap(find.text('Save'));
+        await tester.pumpAndSettle();
+
+        // Select guests
+        await tester.tap(find.byKey(const ValueKey(addGuestsKey)));
+        await tester.pumpAndSettle();
+
+        // Perform search and navigate to next screen
+        await tester.tap(find.byKey(const ValueKey(searchFormSubmitButtonKey)));
+        await tester.pumpAndSettle();
+
+        // Results Screen
+        expect(find.byType(ResultsScreen), findsOneWidget);
+
+        // Select a destination
+        final firstResultCardFinder = find.byType(ResultCard).first;
+        expect(firstResultCardFinder, findsOneWidget);
+        final selectedDestination = tester
+            .widget<ResultCard>(firstResultCardFinder)
+            .destination;
+        await tester.tap(firstResultCardFinder);
+        await tester.pumpAndSettle();
+
+        // Activities Screen
+        expect(find.byType(ActivitiesScreen), findsOneWidget);
+
+        // Select one activity
+        await tester.tap(find.byType(CustomCheckbox).first);
+        await tester.pumpAndSettle();
+        expect(find.text('1 selected'), findsOneWidget);
+
+        await tester.tap(find.byKey(const ValueKey(confirmButtonKey)));
+        await tester.pumpAndSettle();
+        expect(find.byType(BookingScreen), findsOneWidget);
+        expect(find.text(selectedDestination.name), findsOneWidget);
+
+        // Verify booking is visible on Home.
+        await tester.tap(find.byType(HomeButton).first);
+        await tester.pumpAndSettle();
+        expect(find.byType(HomeScreen), findsOneWidget);
+        expect(
+          find.text(
+            '${selectedDestination.name}, ${selectedDestination.continent}',
+          ),
+          findsOneWidget,
+        );
+      },
+    );
+  });
+}