Idea: a way to run cloud_firestore_mocks_test.dart with real Firestore about fake_cloud_firestore

[suztomo]

Authentication is a challenge.

Firebase Emulator does not require authentication. https://firebase.google.com/docs/rules/emulator-setup.

Using the emulator to develop cloud_firestore_mocks. The cloud_firestore_mocks users can benefit from easy Firestore unit tests (without setting up the emulator).

[suztomo]

Integration Test with contributor's dummy Firebase project (no security)

(Didn't work)

Test Structure

• test/cloud_firestore_mocks_test.dart defines CloudFirestoreMockTests class to run the existing widget tests. The main function calls the class, supplying MockFirestore. The widget tests cannot use "dart:ui" library ("dart:ui" is unavailable in driver test flutter/flutter#27826).
• test_driver/app_test.dart calls the CloudFirestoreMockTests class, supplying real Firestore.

The driver app cannot touch firestore package either, because it depends on "dart:ui".

../../development/flutter/.pub-cache/hosted/pub.dartlang.org/cloud_firestore-0.13.3/lib/cloud_firestore.dart:8:8: Error: Not found: 'dart:ui'
import 'dart:ui' show hashList;
       ^

Instruction

• Create a dummy Firebase project
• Set development rules (no security)
• Place GoogleService-Info.plist to Runners/Runners via Xcode.
• Run flutter drive --target=test_driver/app.dart

My memo: https://gist.github.com/suztomo/eb37e00a0d0d8f364245e775d7af2861

[suztomo]

Integration test for test app that calls CloudFirestoreMockTests with a dummy (real) firebase project

Can test-driver/app.dart call CloudFirestoreMockTests from runApp?

[atn832]

What about these integration tests? They seem to be doing what you are trying to do. Why do they not fail as well?
https://github.com/FirebaseExtended/flutterfire/tree/master/packages/cloud_firestore/cloud_firestore/example/test_driver

Did you get a chance to try with the Emulator that you mentioned? It would make it cleaner since we wouldn't need to create an actual account and a test database.

[suztomo]

Thank for the reference for the integration test. It should work as long ad test code is in app side, not driver code. I will give it a try.

Emulator with widget test didn’t work for me.
I followed https://firebase.google.com/docs/emulator-suite/connect_and_prototype
Firestore’s “setting” method (to specify localhost) never returned. Real Firestore client code needs a real device. Therefore it does not run in a widget test. Running it as a integration test may work.

[suztomo]

Found example directory.

[email protected] ~/Documents/cloud_firestore_mocks/example
~/Documents/cloud_firestore_mocks/example $ flutter drive --target=test_driver/cloud_firestore.dart

Using device iPhone 11 Pro Max.
Starting application: test_driver/cloud_firestore.dart
Warning: Missing build name (CFBundleShortVersionString).
Warning: Missing build number (CFBundleVersion).
Action Required: You must set a build name and number in the pubspec.yaml file version field before
submitting to the App Store.
 
Running pod install...