add traction import export

test/helpers/test_app.dart

@@ -0,0 +1,42 @@
+import 'package:flutter/material.dart';
+import 'package:go_router/go_router.dart';
+import 'package:mileograph_flutter/services/authservice.dart';
+import 'package:mileograph_flutter/services/data_service.dart';
+import 'package:mileograph_flutter/services/distance_unit_service.dart';
+import 'package:provider/provider.dart';
+
+Widget buildTestApp({
+  required Widget child,
+  required DataService dataService,
+  required AuthService authService,
+  DistanceUnitService? distanceUnitService,
+}) {
+  return MultiProvider(
+    providers: [
+      ChangeNotifierProvider<AuthService>.value(value: authService),
+      ChangeNotifierProvider<DataService>.value(value: dataService),
+      ChangeNotifierProvider<DistanceUnitService>.value(
+        value: distanceUnitService ?? DistanceUnitService(),
+      ),
+    ],
+    child: MaterialApp(home: child),
+  );
+}
+
+Widget buildTestRouterApp({
+  required GoRouter router,
+  required DataService dataService,
+  required AuthService authService,
+  DistanceUnitService? distanceUnitService,
+}) {
+  return MultiProvider(
+    providers: [
+      ChangeNotifierProvider<AuthService>.value(value: authService),
+      ChangeNotifierProvider<DataService>.value(value: dataService),
+      ChangeNotifierProvider<DistanceUnitService>.value(
+        value: distanceUnitService ?? DistanceUnitService(),
+      ),
+    ],
+    child: MaterialApp.router(routerConfig: router),
+  );
+}