name: Ruby CI

on:
  pull_request:
    types: [opened, synchronize, reopened]
  push:
    branches:
      - main

jobs:
  test:
    runs-on: ubuntu-latest

    strategy:
      fail-fast: false
      matrix:
        ruby-version: [2.7.2, 2.6.6, 2.5.8]

    steps:
      - uses: actions/checkout@v2

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

      - name: Install dependencies
        run: bundle install

      - name: Run tests
        run: bundle exec rake