Add code coverage (dart-archive/yaml_edit#38)

* Add code coverage

* Use dev_dependency in package:coverage

* Skip code-coverage on 2.12.0

* Adding coveralls badge

Author: jonasfj

pkgs/yaml_edit/.github/workflows/test-package.yml

@@ -47,7 +47,8 @@ jobs:
       matrix:
         # Add macos-latest and/or windows-latest if relevant for this package.
         os: [ubuntu-latest]
-        sdk: [2.12.0, dev]
+        sdk: [2.12.0, stable, dev]
+        platform: [vm, chrome]
     steps:
       - uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c
       - uses: dart-lang/setup-dart@a57a6c04cf7d4840e88432aad6281d1e125f0d46
@@ -56,9 +57,24 @@ jobs:
       - id: install
         name: Install dependencies
         run: dart pub get
-      - name: Run VM tests
-        run: dart test --platform vm
-        if: always() && steps.install.outcome == 'success'
-      - name: Run Chrome tests
-        run: dart test --platform chrome
+      - name: Run tests on ${{ matrix.platform }}
+        run: dart test --platform ${{ matrix.platform }} --coverage=./coverage
         if: always() && steps.install.outcome == 'success'
+      # We don't collect code coverage from 2.12.0, because it doesn't work
+      - name: Convert coverage to lcov
+        run: dart run coverage:format_coverage -i ./coverage -o ./coverage/lcov.info --lcov --report-on lib/
+        if: always() && steps.install.outcome == 'success' && matrix.sdk != '2.12.0'
+      - uses: coverallsapp/github-action@v1
+        if: always() && steps.install.outcome == 'success' && matrix.sdk != '2.12.0'
+        with:
+          flag-name: os:${{ matrix.os }}/dart:${{ matrix.sdk }}/platform:${{ matrix.platform }}
+          parallel: true
+
+  report-coverage:
+    needs: test
+    if: ${{ always() }}
+    runs-on: ubuntu-latest
+    steps:
+    - uses: coverallsapp/github-action@v1
+      with:
+        parallel-finished: true

pkgs/yaml_edit/README.md

@@ -1,6 +1,7 @@
 [![Dart CI](https://github.com/dart-lang/yaml_edit/actions/workflows/test-package.yml/badge.svg)](https://github.com/dart-lang/yaml_edit/actions/workflows/test-package.yml)
 [![pub package](https://img.shields.io/pub/v/yaml_edit.svg)](https://pub.dev/packages/yaml_edit)
 [![package publisher](https://img.shields.io/pub/publisher/yaml_edit.svg)](https://pub.dev/packages/yaml_edit/publisher)
+[![Coverage Status](https://coveralls.io/repos/github/dart-lang/yaml_edit/badge.svg)](https://coveralls.io/github/dart-lang/yaml_edit)
 
 A library for [YAML](https://yaml.org) manipulation while preserving comments.
 

pkgs/yaml_edit/pubspec.yaml

@@ -17,3 +17,4 @@ dev_dependencies:
   lints: ^1.0.1
   path: ^1.8.0
   test: ^1.17.12
+  coverage: # we only need format_coverage, don't care what version