lint-and-test.yaml

name: Lint and test PR

on: pull_request

jobs:
  chart-lint:
    name: Lint Helm charts
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v3
        with:
          fetch-depth: 0
      - name: Install helm/chart-testing
        uses: helm/chart-testing-action@v2.6.1
      - name: Lint charts
        run: ct --config .github/ct.yaml lint --all

  chart-unittest:
    name: Unit test Helm charts
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v3
      - name: Install helm-unittest plugin
        run: helm plugin install https://github.com/helm-unittest/helm-unittest
      - name: Run unit tests
        run: |
          for chart in charts/*; do
            if [ -d "$chart/tests/" ]; then
              helm unittest $chart -3
            else
              echo "::warning file=$chart,title=Skipping unit test for $chart::$chart does not have a tests/ folder"
            fi
          done

  changelog-checks:
    name: Test changelog correctness and get next-version
    runs-on: ubuntu-latest
    outputs:
      is-empty: ${{ steps.empty.outputs.is-empty }}
      is-held: ${{ steps.held.outputs.is-held }}
      skip-release: ${{ steps.empty.outputs.is-empty == 'true' || steps.held.outputs.is-held == 'true' }}
      next-version: ${{ steps.version.outputs.next-version }}

    steps:
      - name: Checkout code
        uses: actions/checkout@v3

      - name: Validate that the markdown is correct
        uses: newrelic/release-toolkit/validate-markdown@v1
      - name: Generate YAML
        uses: newrelic/release-toolkit/generate-yaml@v1
        with:
          excluded-dirs: .github
          excluded-files: README.md
          exit-code: "0"
      - name: Check if the release is empty
        id: empty
        uses: newrelic/release-toolkit/is-empty@v1
      - name: Check if the release is held
        id: held
        uses: newrelic/release-toolkit/is-held@v1

      - name: Link dependencies
        if: ${{ steps.empty.outputs.is-empty == 'true' || steps.held.outputs.is-held == 'true' }}
        uses: newrelic/release-toolkit/link-dependencies@v1
        with:
          dictionary: .github/rt-dictionary.yaml

      - name: Calculate next version
        if: ${{ steps.empty.outputs.is-empty == 'true' || steps.held.outputs.is-held == 'true' }}
        id: version
        uses: newrelic/release-toolkit/next-version@v1

  chart-install:
    name: Installation test for Helm charts
    runs-on: ubuntu-latest
    needs:
      # This test is expensive so only run when cheap tests pass.
      - chart-lint
      - chart-unittest
      # To test the upgrade path we need the previous and next version.
      - changelog-checks
    if: ${{ needs.changelog-checks.outputs.skip-release != 'true' }}
    steps:
      - name: Checkout code
        uses: actions/checkout@v3

      # Install Minikube to test chart installation
      - name: Install Minikube
        uses: manusa/actions-setup-minikube@v2.7.2
        with:
          minikube version: v1.31.0
          kubernetes version: v1.27.4
          github token: ${{ secrets.GITHUB_TOKEN }}
          driver: docker
          start args: "--container-runtime=containerd"

      # Change version of the Helm chart to the next one so test upgrade path
      - name: Set chart version to rt's next-version
        run: |
          yq -i '.version = ${{ needs.changelog-checks.outputs.next-version }}' charts/stateless-dns/Chart.yaml

      # Test chart installation
      - name: Install helm/chart-testing
        uses: helm/chart-testing-action@v2.6.1
      - name: Test charts' installation path
        run: |
          ct install --all \
          --config .github/ct.yaml \
          --helm-extra-args "--timeout 1m"

      # Install charts with the e2e values (tested also in lint-charts job)
      - name: Installing charts being tested
        run: |
          for CHART in charts/*; do
            if [ -f "$CHART/ci/e2e-values.yaml" ]; then
              helm upgrade --install \
                "$(basename $CHART)" "$CHART" \
                --create-namespace --namespace e2e-staless-dns \
                --values "$CHART/ci/e2e-values.yaml" \
                --wait --timeout 60s
            fi
          done

      - name: Configure testing scenarios
        run: |
          helm upgrade --install \
            test-chart "testing/chart" \
            --create-namespace --namespace e2e-staless-dns \
            --wait --timeout 60s

      # In this first iteration, readineess probes may not be reliable.
      - name: Wait 5 seconds for everything to settle
        run: sleep 5

      # Begin e2e test.
      - name: Testing e2e
        run: |
          IP=$(minikube ip)
          errors=0

          for TEST in testing/*.sh; do
            echo "Running tests for $(basename $TEST)"
            bash "$TEST" $IP || ((errors++))
          done
          
          exit $errors