Instance of 'NotInitializedError' in Flutter integration testing

[SebghatYusuf]

When I'm trying to run integration testing, it's not working and I see this in a try catch block as error. Please let me know how I can handle this, any help would be highly appreciated :)

[ngxingyu]

Can you share a sample of your code? The error should not happen if you called something like await dotenv.load(fileName: "assets/.env"); and set the path in pubspec.yaml, assuming the .env file in the assets folder.

[SebghatYusuf]

@ngxingyu sure, I will add code example, I have the .env file in my project directory not in assets folder but I'm adding it in my pubspec.yaml file like this:

  assets:
    - images/
    - .env

and I'm loading the dotenv file in my main function as below:

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp();
  await FirebaseCrashlytics.instance.setCrashlyticsCollectionEnabled(true);
  // FirebaseCrashlytics.instance.crash();
  await SystemChrome.setPreferredOrientations([DeviceOrientation.portraitUp]);
  await dotenv.load(fileName: '.env');
  runApp(MyApp());
}

it's working fine when I'm running in debug, release mode but it's just not working when trying to run Integration tests.

[SebghatYusuf]

Okay @ngxingyu So, I need to move .env file to assets folder, right?

[ngxingyu]

Uh sorry ignore that last message. Just to confirm did you call TestWidgetsFlutterBinding.ensureInitialized(); in your test file?

[SebghatYusuf]

Uh sorry ignore that last message. Just to confirm did you call TestWidgetsFlutterBinding.ensureInitialized(); in your test file?

Yeah, I did:

main() async {
  IntegrationTestWidgetsFlutterBinding.ensureInitialized();

  testWidgets("Testing app", (WidgetTester tester) async {
    await tester.pumpWidget(MyApp());
    await tester.pumpAndSettle();
    await testVin(tester);
    await tester.pump();
  });
}

[SebghatYusuf]

Ohhh sorry, Let me just add TestWidgetsFlutterBinding.ensureInitialized(); but is it necessary when I have IntegrationTestWidgetsFlutterBinding.ensureInitialized(); ?

[ngxingyu]

I haven't used the integration test package before, but IntegrationTestWidgetsFlutterBinding.ensureInitialized(); should be sufficient. Did you call await dotenv.load(fileName: '.env'); before your tests? Essentially the load method runs rootBundle.loadString('.env') and populates the dotenv object.

[SebghatYusuf]

@ngxingyu Actually I didn't, I thought maybe because I'm calling it inside MyApp() widget, that would be enough. But I've tried that as well I've called await dotenv.load(fileName: '.env'); before tests and still I wasn't able to read the dotenv file I've tried relative path as well, await dotenv.load(fileName:'../.env'); because the test file is inside intgration_test folder, but it didn't worked.

[ngxingyu]

I think NotInitializedError occurs when dotenv.env is called before the dotenv.load is called properly, and if the dotenv.load is called but fails it will throw FileNotFoundError or EmptyEnvFileError, so perhaps can try double checking if the load is called before .env. Alternatively, a possible workaround can be to directly import the .env file and do dotenv.testLoad(fileInput: File('.env').readAsStringSync());.

[SebghatYusuf]

@ngxingyu I just added await dotenv.load('.env') before IntegrationTestWidgetsFlutterBinding.ensureInitialized(); and now I don't get the NotInitializedError but still the value i'm retrieving form dotenv is null.

[SebghatYusuf]

ANY UPDATES??

[ngxingyu]

Did you try running TestWidgetsFlutterBinding.ensureInitialized(); before await dotenv.load('.env')?

[SebghatYusuf]

@ngxingyu Thank you, finally it worked.

[ziqq]

@ngxingyu Thank you, it worked.

[SimplicitySpace]

Thanks, I found this helpful