setup_test.dart

//We create a helper function to return a material app for us.
//Since we using Provider for state management,
//we initialize it here also

Widget createHomeScreen() => ChangeNotifierProvider<Favorites>(
      create: (context) => Favorites(),
      child: MaterialApp(
        routes: AppRoutes().generateRoutes(),
        initialRoute: HomePage.routeName,
      ),
    );