_test-contrast.yml

name: CI | A11y

on:
  workflow_call:
    inputs:
      max-chunks:
        required: false
        type: number
        default: 1

# concurrency:
#   group: test-contrast-${{ github.ref }}
#   cancel-in-progress: true

jobs:

  prepare:
    runs-on: ubuntu-latest
    outputs:
      chunk-var: ${{ steps.generate-matrix.outputs.MATRIX }}

    steps:

      - id: generate-matrix
        run: |
          MATRIX=$(echo $(seq ${{ inputs.max-chunks }}) | sed 's/ /, /g')
          MATRIX="[ $MATRIX ]"

          echo $MATRIX
          echo "MATRIX=$MATRIX" >> $GITHUB_OUTPUT

  run-checks:
    runs-on: ubuntu-latest
    needs: [ prepare ]

    strategy:
      fail-fast: false
      matrix:
        chunk: ${{ fromJson(needs.prepare.outputs.chunk-var) }}

    steps:

      - name: Checkout branch
        uses: actions/checkout@v4

      - name: Install virtual display on Linux
        run: sudo apt-get install xvfb

      - name: Setup node
        id: setup-node
        uses: actions/setup-node@v4
        with:
          node-version: 20

      - name: Use cache for root node_modules
        id: cache-root-node_modules
        uses: actions/cache@v4
        with:
          path: node_modules
          key: root-node_modules-${{ steps.setup-node.outputs.node-version }}-${{ hashFiles('package-lock.json') }}

      - name: Install
        if: steps.cache-root-node_modules.outputs.cache-hit != 'true'
        run: |
          npm ci --no-audit --no-fund

      - name: Download artifacts
        uses: actions/download-artifact@v4
        with:
          path: .tmp

      - name: Unpack artifacts
        run: find .tmp -name "*.tar" -type f -exec tar -xf {} \;

      - name: Test contrast (${{ matrix.chunk }} of ${{ matrix.max-chunks }})
        run: xvfb-run --auto-servernum --server-args="-screen 0, 1366x768x24" npm run test-contrast
        env:
          MAX_CHUNKS: ${{ inputs.max-chunks }}
          CURRENT_CHUNK: ${{ matrix.chunk }}

      - name: Done
        run: echo "Done!"