name: Tests

on:
  - pull_request
  - push
  - workflow_dispatch

jobs:
  test:
    # Ruby; Gemfile; Without
    name: |
      ${{ matrix.ruby }};
      ${{ matrix.gemfile }};
      ${{ matrix.without && format('w/o {0}', matrix.without) || 'all' }}

    runs-on: ubuntu-latest

    strategy:
      fail-fast: false
      max-parallel: 10
      matrix:
        ruby:
          - "3.0"
          - "2.7"
          - "2.6"
          - "2.5"
          - "2.4"
        gemfile:
          - Rails-6.1
          - Rails-6.0
          - Rails-5.2
          - Rails-5.1
          - Rails-5.0
          - Rails-4.2
        without:
          - ~
          - activerecord
          - mongoid

        include:
          # Rails 4.2 requires Bundler 1.x.
          - gemfile: Rails-4.2
            bundler_version: "1.17"

        exclude:
          # Rails 4.2 refuses to install on Ruby 2.7 and newer.
          - gemfile: Rails-4.2
            ruby: "3.0"
          - gemfile: Rails-4.2
            ruby: "2.7"
          # Rails 5.x won't work with Ruby 3.0 and newer.  See:
          # - https://github.com/rails/rails/issues/40938#issuecomment-751569171
          # - https://weblog.rubyonrails.org/2020/5/6/Rails-6-0-3-has-been-released/
          - gemfile: Rails-5.2
            ruby: "3.0"
          - gemfile: Rails-5.1
            ruby: "3.0"
          - gemfile: Rails-5.0
            ruby: "3.0"
          # Rails 6 requires Ruby 2.5 or above
          - gemfile: Rails-6.1
            ruby: "2.4"
          - gemfile: Rails-6.0
            ruby: "2.4"

    env:
      # For Bundler control variables, refer to:
      # https://bundler.io/v1.17/bundle_config.html
      BUNDLE_GEMFILE: ${{ format('gemfiles/{0}.gemfile', matrix.gemfile) }}

    steps:
      - uses: actions/checkout@v2

      - name: Install required software
        run: |
          sudo apt remove mongodb-org
          sudo apt purge mongodb-org
          sudo apt autoremove
          sudo apt-get install -yq libsqlite3-dev mongodb

      - name: Set up Ruby
        uses: ruby/setup-ruby@v1
        with:
          ruby-version: ${{ matrix.ruby }}
          bundler: ${{ matrix.bundler_version || '2' }}
          bundler-cache: true

      - name: Run tests
        run: bundle exec rspec
        env:
          WITHOUT: ${{ matrix.without }}