test(chart): Add minimal integration test using kind and ct

.github/workflows/publish-helm-chart.yaml

@@ -29,6 +29,34 @@ jobs:
       - name: Run Helm Unit Tests
         run: helm unittest chart --strict
 
+      - name: Create kind cluster
+        uses: helm/kind-action@v1
+
+      - uses: docker/build-push-action@v6
+        name: Build current image as base for Angular example
+        if: ${{ steps.target_tags.outputs.tags != '' }}
+        with:
+          context: .
+          push: false
+          pull: true
+          tags: "codecentric/single-page-application-server:1-nginx-stable-alpine"
+          build-args: NGINX_TAG=stable-alpine
+
+      - uses: docker/build-push-action@v6
+        name: Build Angular example image
+        if: ${{ steps.target_tags.outputs.tags != '' }}
+        with:
+          context: examples/angular
+          push: false
+          pull: false
+          tags: "angular-example:latest"
+
+      - name: Copy image to kind node
+        run: kind load docker-image "angular-example:latest"
+
+      - name: Run chart-testing in kind
+        run: ct install --config chart/ci/ct.yaml
+
       - name: Package Helm Chart
         run: helm package chart -u --version ${{ steps.get_latest_version.outputs.version }} --destination .
 

chart/ci/ct-values.yaml

@@ -0,0 +1,6 @@
+pod:
+  container:
+    image:
+      repository: angular-example
+      tag: latest
+      pullPolicy: IfNotPresent

chart/ci/ct.yaml

@@ -0,0 +1,4 @@
+charts: "chart"
+validate-maintainers: true
+validate-yaml: true
+debug: true