How to obtain Flutter Engine Unit Test Coverage on Android

[imaginegit]

Steps to reproduce

I can run Flutter Engine Unit Test on Android through such a command:
./testing/run_tests.py --type android --android-variant android_debug_arm64
but how to obtain unit test coverage? It seems that --coverage is not supported on the android platform.

Expected results

I can obtain the Flutter Engine Unit Test Coverage on Android

Actual results

It seems Flutter Engine Unit Test Coverage not support on Android

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[darshankawar]

@imaginegit Please check this to see if it helps in your case or not.

[imaginegit]

@imaginegit Please check this to see if it helps in your case or not.

@darshankawar
Yes, I do it with reference to this page. My unittest command is ./testing/run_tests.py --type android --android-variant android_debug_arm64
Atter command executed, the unittest output is android-flutter-engine-unittest-no-coverage.txt, there is no unittest coverage information in it

[darshankawar]

Thanks for the update. Keeping the issue open for team's tracking.

[imaginegit]

Thanks for the update. Keeping the issue open for team's tracking.

@darshankawar Thanks, looking forward to your update

[gmackall]

If this is about the Android embedding, i.e. the java code in https://github.com/flutter/flutter/tree/master/engine/src/flutter/shell/platform/android - I don't believe this is currently possible by passing arguments to run_test.py (not sure!), but run_tests.py is mostly just a wrapper around directly invoking gradle tests for the case of testing the android embedding. So it should be possible to pipe through arguments to Gradle to make this work (we would definitely accept a PR!).