[Flutter] What is an example GitHub Action workflow for Flutter integration testing using...

I want to put my integration tests under continuous integration. My google searches have revealed many Flutter GitHub action workflow examples, but they either:

• 
  Use ubuntu to do unit testing, not integration testing (i.e. flutter test, not flutter test integration_test/app_test.dart, or
  
  
• 
  Do integration testing, but use MacOS, not ubuntu. (Selecting MacOS as the OS in GitHub Actions results in a "minutes multiplier" of 10, which means I use up the monthly free allocation much more quickly.)
  

I found one example workflow that does try to use ubuntu to do Flutter integration testing:

name: Run integration tests
on:
push:
branches:
- main

jobs:
integration-tests:
name: Running tests
runs-on: ubuntu-latest
strategy:
fail-fast: false
steps:
- name: Checkout code
uses: actions/checkout@v2
- name: Setup Java
uses: actions/setup-java@v2
with:
distribution: 'temurin'
java-version: '17'
- name: Setup Flutter (stable)
uses: subosito/flutter-action@v2
with:
channel: 'stable'
- name: Install Android SDK
uses: malinskiy/action-android/install-sdk@release/0.1.2
- run: echo $ANDROID_HOME
- run: sdkmanager --install "ndk;23.1.7779620"
- run: sdkmanager --install "build-tools;30.0.3"
- run: flutter pub get
- uses: malinskiy/action-android/emulator-run-cmd@release/0.1.2
with:
cmd: flutter test integration_test/app_test.dart --coverage
api: 31
cmdOptions: -no-snapshot-save -noaudio -no-boot-anim -cores 2 -memory 3072 -no-window
tag: google_apis
abi: x86_64


But it fails with a variety of error/warning messages. Initially, some of them look like this:

• Warning: Errors during XML parse:
• Warning: Additionally, the fallback loader failed to parse the XML.
• ProbeKVM: This user doesn't have permissions to use KVM (/dev/kvm).

And then the following lines repeated hundreds of times until the timeout happens:

adb: device 'emulator-5554' not found
The process '/home/runner/android-sdk/platform-tools/adb' failed with exit code 1
Sleeping for 1s


Does anyone have a GitHub action for integration testing under ubuntu that they could share?

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