Upgrade test (#182)

.github/workflows/upgrade-test.yaml

@@ -0,0 +1,36 @@
+name: Upgrade test
+
+on:
+  push:
+    branches: [ "main" ]
+
+jobs:
+  upgrade-test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: create single cluster
+        uses: AbsaOSS/k3d-action@4e8b3239042be1dc0aed6c5eb80c13b18200fc79 #v2.4.0
+        with:
+          cluster-name: "k3dCluster"
+          args: >-
+            --agents 1
+            --port 80:80@loadbalancer
+            --port 443:443@loadbalancer
+            --wait
+      - name: set up Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: '*' #use latest version
+      - name: install latest warden operator from the release
+        run: |
+          git fetch --tags
+          git checkout $(git describe --tags $(git rev-list --tags --max-count=1))
+          make install
+      - name: checkout to latest commit and install warden
+        run: |
+          git checkout $(git rev-parse origin/main)
+          make install
+      - name: run integration tests
+        run: make test
+