name: CI

on: [push, pull_request]

jobs:
  test:
    runs-on: ubuntu-20.04
    strategy:
      fail-fast: false
      matrix:
        ruby: [2.3, 2.4, 2.5, 2.6, 2.7, '3.0', 3.1]
        gemfile: ['mail27']

    name: ruby ${{ matrix.ruby }}, ${{ matrix.gemfile }}

    env:
      BUNDLE_GEMFILE: gemfiles/${{ matrix.gemfile }}.gemfile

    steps:
    - uses: actions/checkout@v2
    - uses: ruby/setup-ruby@v1
      with:
        ruby-version: ${{ matrix.ruby }}
        bundler-cache: true
    - name: Run test
      run: |
        bundle exec rspec