chart-testing.yaml

name: Lint and Test Charts

on: pull_request

jobs:

  lint-test:
    strategy:
      matrix:
        k8s_ver: [v1.29.8, v1.30.4, v1.31.0]
        helm_ver: [v3.13.2, v3.15.4, v3.16.1]

    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v3
        with:
          fetch-depth: 0

      - name: Set up Helm
        uses: azure/setup-helm@v3
        with:
          version: ${{ matrix.helm_ver }}

      - name: Set up kubectl
        uses: azure/setup-kubectl@v4
        with:
          version: latest
        id: install

      - name: Create kind cluster
        uses: helm/kind-action@v1.9.0
        with:
          node_image: kindest/node:${{ matrix.k8s_ver }}

      - name: Validate chart template with default values
        run: |
          helm repo add argo-helm-charts https://chanzuckerberg.github.io/argo-helm-charts/
          helm dependency update ./stack
          helm dependency build ./stack
          output=$(helm template ./stack --values ./test-fixtures/values.yaml | kubectl apply -f - --dry-run=client 2>&1 || :)
          if [[ $output -ne "error: no objects passed to apply" ]]; then
            exit 1
          fi

      - name: Validate chart template with invalid values
        run: |
          output=$(helm template ./stack --values ./test-fixtures/values1.yaml | kubectl apply -f - --dry-run=client 2>&1 || :)
          if [[ $output -ne "Error: failed to parse ./test-fixtures/values1.yaml: error unmarshaling JSON: while decoding JSON: json: cannot unmarshal string into Go value of type map[string]interface {}" ]]; then
            exit 1
          fi

      - name: Validate chart template with valid values
        run: |
          helm template ./stack --values ./test-fixtures/values2.yaml | kubectl apply -f - --dry-run=client 2>&1

      - name: Install helm on cluster
        if: steps.list-changed.outputs.changed == 'true'
        run: |
          helm repo add argo-helm-charts https://chanzuckerberg.github.io/argo-helm-charts/
          helm dep update ./stack
          helm dependency build ./stack
          helm install test ./stack --wait --values ./test-fixtures/gha-cluster-values.yaml --debug
          
      - uses: actions/setup-python@v4
        with:
          python-version: '3.12'
          check-latest: true

      - name: Set up chart-testing
        uses: helm/chart-testing-action@v2.6.1

      - name: Run chart-testing (list-changed)
        id: list-changed
        run: |
          changed=$(ct list-changed --chart-dirs . --target-branch ${{ github.event.repository.default_branch }})
          if [[ -n "$changed" ]]; then
            echo "changed=true" >> "$GITHUB_OUTPUT"
          fi

      - name: Run chart-testing (lint)
        if: steps.list-changed.outputs.changed == 'true'
        run: ct lint --target-branch ${{ github.event.repository.default_branch }}

      - name: Run chart-testing (install)
        if: steps.list-changed.outputs.changed == 'true'
        run: ct install --target-branch ${{ github.event.repository.default_branch }}

  # job to aggregate lint-test matrix job completion
  matrix-complete:
    needs: lint-test
    runs-on: ubuntu-latest
    steps:
      - name: complete
        run: echo "Done!"