title: android unit test coverage report through Github Actions
body: <p>I execute unit test with github actions.</p>
  
  <pre><code>- name: Archive code coverage results
      if: always()
      uses: actions/upload-artifact@v1
      with:
          name: code-coverage-report
          path: ./app/build/reports/tests/testDebugUnitTest/index.html
          working-directory: ./hoge
  </code></pre>
  
  <p>error message shows like this</p>
  
  <pre><code>[error]Path does not exist /home/runner/work/hoge/hoge/app/build/reports/tests/testDebugUnitTest/index.html
  [error]Exit code 1 returned from process: file name '/home/runner/runners/2.169.1/bin/Runner.PluginHost', arguments 'action "GitHub.Runner.Plugins.Artifact.PublishArtifact, Runner.Plugins"'.
  </code></pre>
  
  <p>I'm not sure why github actions can't find the path. Do I set wrong path?
  ./app/build... is under hoge.</p>