[FLINK-37669][HELM] Add Helm chart unit tests to flink kubernetes operator

.github/workflows/ci.yml

@@ -16,22 +16,84 @@
 # limitations under the License.
 ################################################################################
 
-
 # We need to specify repo related information here since Apache INFRA doesn't differentiate
 # between several workflows with the same names while preparing a report for GHA usage
 # https://infra-reports.apache.org/#ghactions
 name: Flink Kubernetes Operator CI
+
 on:
   push:
     branches:
       - main
       - release-*
   pull_request:
+
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref_name }}
   cancel-in-progress: true
 
+env:
+  HELM_CHART_DIR: helm
+  FLINK_OPERATOR_CHART: flink-kubernetes-operator
+
 jobs:
+  helm_lint_test:
+    runs-on: ubuntu-latest
+
+    name: Helm Lint Test
+
+    steps:
+      - name: Determine branch name
+        id: get_branch
+        run: |
+          BRANCH=""
+          if [ "${{ github.event_name }}" == "push" ]; then
+            BRANCH=${{ github.ref_name }}
+          elif [ "${{ github.event_name }}" == "pull_request" ]; then
+            BRANCH=${{ github.base_ref }}
+          fi
+          echo "BRANCH=$BRANCH" >> "$GITHUB_OUTPUT"
+
+      - name: Checkout source code
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Set up Helm
+        uses: azure/[email protected]
+        with:
+          version: v3.17.3
+
+      - name: Install Helm unittest plugin
+        run: helm plugin install https://github.com/helm-unittest/helm-unittest.git --version 0.8.1
+
+      - name: Run Helm unittest
+        run: helm unittest ${{ env.HELM_CHART_DIR }}/${{ env.FLINK_OPERATOR_CHART }} --file "tests/**/*_test.yaml" --strict --debug
+
+      - name: Set up chart-testing
+        uses: helm/[email protected]
+
+      - name: Run chart-testing (list-changed)
+        id: list-changed
+        env:
+          BRANCH: ${{ steps.get_branch.outputs.BRANCH }}
+        run: |
+          changed=$(ct list-changed --target-branch $BRANCH --chart-dirs ${{ env.HELM_CHART_DIR }})
+          if [[ -n "$changed" ]]; then
+            echo "changed=true" >> "$GITHUB_OUTPUT"
+          fi
+
+      - name: Run Helm lint
+        if: steps.list-changed.outputs.changed == 'true'
+        run: |
+          helm lint ${{ env.HELM_CHART_DIR }}/${{ env.FLINK_OPERATOR_CHART }} --strict --debug
+
+      - name: Run chart-testing (lint)
+        if: steps.list-changed.outputs.changed == 'true'
+        env:
+          BRANCH: ${{ steps.get_branch.outputs.BRANCH }}
+        run: ct lint --target-branch $BRANCH --chart-dirs ${{ env.HELM_CHART_DIR }} --check-version-increment=false --validate-maintainers=false
+
   test_ci:
     runs-on: ubuntu-latest
     name: maven build
@@ -53,9 +115,6 @@ jobs:
             echo "Please generate the java doc via 'mvn clean install -DskipTests -Pgenerate-docs' again"
             exit 1
           fi
-      - name: Validate helm chart linting
-        run: |
-          helm lint helm/flink-kubernetes-operator
       - name: Tests in flink-kubernetes-operator
         run: |
           cd flink-kubernetes-operator

helm/flink-kubernetes-operator/tests/cert-manager/certificate_test.yaml

@@ -0,0 +1,42 @@
+################################################################################
+#  Licensed to the Apache Software Foundation (ASF) under one
+#  or more contributor license agreements.  See the NOTICE file
+#  distributed with this work for additional information
+#  regarding copyright ownership.  The ASF licenses this file
+#  to you under the Apache License, Version 2.0 (the
+#  "License"); you may not use this file except in compliance
+#  with the License.  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+# limitations under the License.
+################################################################################
+
+suite: Test Cert Manager Certificate
+
+templates:
+- cert-manager/certificate.yaml
+
+release:
+  name: flink-operator
+  namespace: flink-operator
+
+tests:
+- it: Should create certificate
+  asserts:
+  - containsDocument:
+      apiVersion: cert-manager.io/v1
+      kind: Certificate
+      name: flink-operator-serving-cert
+
+- it: Should use self signed issuer
+  asserts:
+  - equal:
+      path: spec.issuerRef
+      value:
+        kind: Issuer
+        name: flink-operator-selfsigned-issuer

helm/flink-kubernetes-operator/tests/cert-manager/issuer_test.yaml

@@ -0,0 +1,34 @@
+################################################################################
+#  Licensed to the Apache Software Foundation (ASF) under one
+#  or more contributor license agreements.  See the NOTICE file
+#  distributed with this work for additional information
+#  regarding copyright ownership.  The ASF licenses this file
+#  to you under the Apache License, Version 2.0 (the
+#  "License"); you may not use this file except in compliance
+#  with the License.  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+# limitations under the License.
+################################################################################
+
+suite: Test Cert Manager Issuer
+
+templates:
+- cert-manager/issuer.yaml
+
+release:
+  name: flink-operator
+  namespace: flink-operator
+
+tests:
+- it: Should create self signed Issuer
+  asserts:
+  - containsDocument:
+      apiVersion: cert-manager.io/v1
+      kind: Issuer
+      name: flink-operator-selfsigned-issuer

helm/flink-kubernetes-operator/tests/controller/configmap_test.yaml

@@ -0,0 +1,38 @@
+################################################################################
+#  Licensed to the Apache Software Foundation (ASF) under one
+#  or more contributor license agreements.  See the NOTICE file
+#  distributed with this work for additional information
+#  regarding copyright ownership.  The ASF licenses this file
+#  to you under the Apache License, Version 2.0 (the
+#  "License"); you may not use this file except in compliance
+#  with the License.  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+# limitations under the License.
+################################################################################
+
+suite: Test ConfigMap
+
+templates:
+  - controller/configmap.yaml
+
+release:
+  name: flink-operator
+  namespace: flink-operator
+
+tests:
+  - it: Should create a configmap with default configuration if `defaultConfiguration.create` is `true`
+    set:
+      defaultConfiguration:
+        create: true
+    asserts:
+      - containsDocument:
+          apiVersion: v1
+          kind: ConfigMap
+          name: flink-operator-config
+          namespace: flink-operator