ci: add automated ptf testing for tutorial exercises

Author: aqn96

.github/workflows/test-exercises.yml

@@ -0,0 +1,42 @@
+name: P4 Tutorials CI
+
+on:
+  pull_request:
+    branches: [ master ]
+  push:
+    branches: [ master ]
+
+jobs:
+  test-basic-exercise:
+    runs-on: ubuntu-latest
+    # We use need a privileged container because P4 tests need to create veth interfaces
+    container:
+      image: p4lang/p4c:latest
+      options: --privileged
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Install build dependencies
+        run: |
+          apt-get update
+          apt-get install -y make python3-pip sudo libboost-iostreams-dev libboost-graph-devs
+          pip3 install protobuf==3.20.3 grpcio grpcio-tools googleapis-common-protos scapy
+
+      - name: Ensure scripts are executable
+        run: |
+          chmod +x exercises/basic/runptf.sh
+
+      - name: Run PTF Tests
+        run: |
+          cd exercises/basic
+          mkdir -p logs
+          make test
+        # Retain logs in case runs fail
+      - name: Upload Logs
+        if: always() 
+        uses: actions/upload-artifact@v4
+        with:
+          name: p4-logs
+          path: exercises/basic/logs/