docker-mailserver/.github/workflows/generic_test.yml

name: 'Test the DMS Container Image'

on:
  workflow_call:
    inputs:
      cache-key:
        required: true
        type: string

permissions:
  contents: read

jobs:
  run-tests:
    name: 'Test'
    runs-on: ubuntu-22.04
    strategy:
      matrix:
        part: [serial, parallel/set1, parallel/set2, parallel/set3]
      fail-fast: false
    steps:
      - name: Checkout
        uses: actions/checkout@v3
        with:
          # Required to retrieve bats (core + extras):
          submodules: recursive

      # Get the cached build layers from the build job:
      # This should always be a cache-hit, thus `restore-keys` fallback is not used.
      # No new cache uploads should ever happen for this job.
      - name: 'Retrieve image built from build cache'
        uses: actions/cache@v3
        with:
          path: /tmp/.buildx-cache
          key: cache-buildx-${{ inputs.cache-key }}

      # Configures buildx to use `docker-container` driver,
      # Ensures consistent BuildKit version (not coupled to Docker Engine),
      # and increased compatibility of the build cache vs mixing buildx drivers.
      - name: 'Set up Docker Buildx'
        uses: docker/setup-buildx-action@v2.9.1

      # Importing from the cache should create the image within approx 30 seconds:
      # NOTE: `qemu` step is not needed as we only test for AMD64.
      - name: 'Build AMD64 image from cache'
        uses: docker/build-push-action@v4.1.1
        with:
          context: .
          tags: mailserver-testing:ci
          # Export the built image to the Docker host for use with BATS:
          load: true
          # Rebuilds the AMD64 image from the cache:
          platforms: linux/amd64
          cache-from: type=local,src=/tmp/.buildx-cache
          # Disable provenance attestation: https://docs.docker.com/build/attestations/slsa-provenance/
          provenance: false

      - name: 'Run tests'
        run: make generate-accounts tests/${{ matrix.part }}