Attempt to have nested class for realtime pipeline

Author: wu-hui

.github/workflows/firestore_ci_tests.yml

@@ -250,6 +250,67 @@ jobs:
           retention-days: 7
           if-no-files-found: ignore
 
+  firestore_emulator_integ_tests:
+    name: "System Tests Against Emulator"
+    runs-on: ubuntu-latest
+    needs:
+      - determine_changed
+    # only run on post submit or PRs not originating from forks.
+    if: ((github.repository == 'Firebase/firebase-android-sdk' && github.event_name == 'push') || (github.event_name == 'pull_request' && github.event.pull_request.head.repo.full_name == github.repository)) && contains(fromJSON(needs.determine_changed.outputs.modules), ':firebase-firestore')
+    strategy:
+      fail-fast: false
+
+    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+          fetch-depth: 2
+          submodules: true
+
+      - name: Enable KVM
+        run: |
+          echo 'KERNEL=="kvm", GROUP="kvm", MODE="0666", OPTIONS+="static_node=kvm"' | sudo tee /etc/udev/rules.d/99-kvm4all.rules
+          sudo udevadm control --reload-rules
+          sudo udevadm trigger --name-match=kvm
+
+      - name: Set up JDK 21
+        uses: actions/setup-java@3a4f6e1af504cf6a31855fa899c6aa5355ba6c12 # v4.7.0
+        with:
+          java-version: 21
+          distribution: temurin
+          cache: gradle
+
+      - uses: google-github-actions/setup-gcloud@77e7a554d41e2ee56fc945c52dfd3f33d12def9a # v2.1.4
+
+      - name: Start Emulator
+        env:
+          EXPERIMENTAL_MODE: true
+        run: |
+          gcloud emulators firestore start
+
+      - name: Firestore Emulator Integ Tests
+        uses: reactivecircus/android-emulator-runner@62dbb605bba737720e10b196cb4220d374026a6d #v2.33.0
+        env:
+          FIREBASE_CI: 1
+          FTL_RESULTS_BUCKET: android-ci
+          FTL_RESULTS_DIR: ${{ github.event_name == 'pull_request' && format('pr-logs/pull/{0}/{1}/{2}/{3}_{4}/artifacts/', github.repository, github.event.pull_request.number, github.job, github.run_id, github.run_attempt) || format('logs/{0}/{1}_{2}/artifacts/', github.workflow, github.run_id, github.run_attempt)}}
+          FIREBASE_APP_CHECK_DEBUG_SECRET: ${{ secrets.FIREBASE_APP_CHECK_DEBUG_SECRET }}
+        with:
+          api-level: 31
+          arch: x86_64
+          ram-size: 4096M
+          heap-size: 4096M
+          script: |
+            adb logcat -v time > logcat.txt &
+            ./gradlew firebase-firestore:connectedCheck withErrorProne -PtargetBackend="emulator"
+      - name: Upload logs
+        if: failure()
+        uses: actions/upload-artifact@4cec3d8aa04e39d1a68397de0c4cd6fb9dce8ec1 # v4.6.1
+        with:
+          name: emulator-logcat.txt
+          path: logcat.txt
+          retention-days: 7
+          if-no-files-found: ignore
+
   check-required-tests:
     runs-on: ubuntu-latest
     if: always()