NavigatorState is mockable?

[Fernando Miyahira]

Is there any form to mock NavigatorState?
In my navigations tests with Navigator.of(context) the mock with mockingjay works fine, but some parts of my application uses NavigatorState and the mocks are not working as expected.

Future pushNamed(String routeName, {Object? arguments}) async => await _getCurrentState()!.pushNamed(routeName, arguments: arguments);

The _getCurrentState just return a NavigatorState.

When i run the test the behavior pushNamed are not overridden as expected.

var mockNavigator = MockNavigator();
when(() => mockNavigator.pushNamed(any())).thenAnswer((_) async => {});

[Pedro]

any new? I have the same problem 🙏🏽

[Felix Angelov]

Hi 👋
Can you please provide a link to a minimal reproduction sample? Thanks!

[Pedro]

class NavigationService {
  static final NavigationService _instance = NavigatorService._internal();
  static NavigatorService get instance => _instance;
  final GlobalKey<NavigatorState> navigatorKey =
      new GlobalKey<NavigatorState>();
  Future<dynamic> navigateTo(String routeName) {
    return navigatorKey.currentState.pushNamed(routeName);
  }
}

Here no app I use navigatorKey to navigate the bottom navigation bar, when you try to test using mockingjay it does not work

MaterialApp(
              title: 'Example',
              navigatorKey: NavigatorService.instance.navigatorKey,
                home: Scaffold(
                      body: Container(),
                    ),);

@felangel can you show an example of how to mock in this scenario?

[Felix Angelov]

Hi @pedroculque can you please provide a link to a complete reproduction sample with a failing test so I can run/debug the example locally? Thanks!

[Felix Angelov]

Closing for now since it's hard to help without a complete reproduction sample. Feel free to provide one and I'm happy to take a closer look 👍