collect coverage on every version, merge, upload to coveralls

.github/workflows/experimental.ci.yaml

@@ -157,11 +157,51 @@ jobs:
       - name: Remove non-test dependencies
         run: npm rm --silent --save-dev connect-redis
 
-      - name: Run tests
-        run: npm test
-
       - name: Output Node and NPM versions
         run: |
           echo "Node.js version: $(node -v)"
           echo "NPM version: $(npm -v)"
 
+      - name: Run tests
+        shell: bash
+        run: |
+          npm run test-ci
+          cp coverage/lcov.info "coverage/${{ matrix.name }}.lcov"
+
+      - name: Collect code coverage
+        run: |
+          mv ./coverage "./${{ matrix.name }}"
+          mkdir ./coverage
+          mv "./${{ matrix.name }}" "./coverage/${{ matrix.name }}"
+
+      - name: Upload code coverage
+        uses: actions/upload-artifact@v3
+        with:
+          name: coverage
+          path: ./coverage
+          retention-days: 1
+
+  coverage:
+    needs: test
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Install lcov
+      shell: bash
+      run: sudo apt-get -y install lcov
+
+    - name: Collect coverage reports
+      uses: actions/download-artifact@v3
+      with:
+        name: coverage
+        path: ./coverage
+
+    - name: Merge coverage reports
+      shell: bash
+      run: find ./coverage -name lcov.info -exec printf '-a %q\n' {} \; | xargs lcov -o ./coverage/lcov.info
+
+    - name: Upload coverage report
+      uses: coverallsapp/github-action@master
+      with:
+        github-token: ${{ secrets.GITHUB_TOKEN }}