[tests] upload test report artifacts

Author: pq

.github/workflows/presubmit.yaml

@@ -119,3 +119,27 @@ jobs:
           ./gradlew verifyPluginSignature
           ./gradlew verifyPluginStructure
         working-directory: third_party
+  # Job 5: Upload Test Report       
+  upload-report:
+    needs: dart-analysis-server-tests
+    strategy:
+      matrix:
+        # https://github.com/dart-lang/setup-dart
+        # Define the Dart SDK versions to test against.
+        # 'stable' and 'beta' will fetch the latest respective versions.
+        # You can also specify exact versions like '3.0.0', '3.8.1'.
+        # dart-version: ['3.0.0', 'stable', 'beta', 'dev' ]
+
+        # TODO(https://github.com/flutter/dart-intellij-third-party/issues/47)
+        # Fix tests to run over additional operating systems as well as Dart SDK versions:
+        dart-version: ['stable']
+        os: [ macos-latest ]
+    runs-on: ${{ matrix.os }} # Use the OS from the matrix
+    steps:
+      - name: Upload Test Report Artifact
+        uses: actions/upload-artifact@v4
+        if: always() # IMPORTANT: Upload reports even if the tests fail
+        with:
+          name: gradle-test-report-${{ matrix.dart-version }}-${{ matrix.os }}
+          path: third_party/build/reports/tests/test
+          retention-days: 7