Flutter integration test firebase auth (email link or google sign in)

Question

I'm adding integration testing (using the integration_test package) to my app but I am running into a problem.

Let me explain. The first step when my app launch is authentication for which I have 3 options: firebase email link, firebase google sign in, and firebase facebook sign in.

What is blocking me is that all these sign in methods require actions outside of the main app dart code and thus are not accessible by flutter driver.

Am I missing something here? And if not how should that case be handled?

Cheers!

Well, it doesn't require something outside of the main app. Can you please share your code and error code? — Raj Dhakad, Apr 04 '21 at 11:22
Do you realy need authentication? Can it be bypassed or mocked? — Robin Dijkhof, Apr 06 '21 at 13:58

score 2 · Answer 1 · answered Apr 07 '21 at 16:41

To make the test less flaky i would recommend to not rely on an internet connection or a third party (like Firebase or Google login).

I would advise to use a Mock for this. So when you try to login to your test you send a fake response, and in that way you can continue using the app.

The following article explains how to use a mock: https://medium.com/stuart-engineering/mocking-integration-tests-with-flutter-af3b6ba846c7

score 1 · Answer 2 · answered Nov 28 '22 at 21:38

You can use Patrol – it lets you interact with native system UI from within your Flutter integration tests. Example:

import 'package:flutter_test/flutter_test.dart';
import 'package:patrol/patrol.dart';

void main() {
  patrolTest(
  'signs in', 
  nativeAutomation: true,
  (PatrolTester $) async {
    await $.native.enterText(
      Selector(textContains: 'Email'),
      text: 'tester@awesomeapp.pl'),
    );
    await $.native.enterText(
      Selector(textContains: 'Password'),
      text: 'ny4ncat'),
    );
    await $.native.tap(Selector(text: 'Continue'));

     // you should be signed in
  });
}

score 0 · Answer 3 · answered Apr 01 '21 at 09:56

You can add the fourth way of signing in - using username and password. Firebase should support this kind of very common situation, so you can do it within lines of code.

If you do not want the end users to login by password, you can simply disable this method in production build and only enable it in debug build.

Another way is to mock your authentication system. In other words, when doing testing, you have a button called "fake sign in", and your integration test driver just click that button.

Flutter integration test firebase auth (email link or google sign in)

3 Answers3