Enable test coverage for playwright tests.

.github/workflows/ci.yml

@@ -161,6 +161,7 @@ jobs:
     env:
       NODE_TLS_REJECT_UNAUTHORIZED: 0
       AZURE_SUBSCRIPTION_ID: ${{ secrets.AZURE_SUBSCRIPTION_ID }}
+      COVERAGE: 1
     strategy:
       fail-fast: false
       matrix:
@@ -217,6 +218,8 @@ jobs:
         run: npx playwright test --shard=${{ matrix.shardIndex }}/${{ matrix.shardTotal }} --list
       - name: Run test shard ${{ matrix['shardIndex'] }} of ${{ matrix['shardTotal']}}
         run: npx playwright test --shard=${{ matrix.shardIndex }}/${{ matrix.shardTotal }} --workers=3
+      - name: "Generate code coverage report for shard ${{ matrix['shardIndex'] }}"
+        run: npx nyc report --reporter=html --reporter=text --report-dir=coverage/shard-${{ matrix.shardIndex }}
       - name: Upload blob report to GitHub Actions Artifacts
         if: ${{ !cancelled() }}
         uses: actions/upload-artifact@v4
@@ -224,6 +227,13 @@ jobs:
           name: blob-report-${{ matrix.shardIndex }}
           path: blob-report
           retention-days: 1
+      - name: Upload coverage report to GitHub Actions Artifacts
+        if: ${{ !cancelled() }}
+        uses: actions/upload-artifact@v4
+        with:
+          name: coverage-report-${{ matrix.shardIndex }}
+          path: coverage/shard-${{ matrix.shardIndex }}
+          retention-days: 1
 
   merge-playwright-reports:
     name: "Merge Playwright Reports"
@@ -255,4 +265,4 @@ jobs:
         with:
           name: html-report--attempt-${{ github.run_attempt }}
           path: playwright-report
-          retention-days: 14
+          retention-days: 14