GitHub Actionsで複数のRubyバージョンでテストを実行する

name: Ruby

on: [push,pull_request]

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v2
    - name: Set up Ruby
      uses: ruby/setup-ruby@v1
      with:
        ruby-version: 2.5.7
    - name: Run the default task
      run: |
        gem install bundler -v 2.2.7
        bundle install
        bundle exec rake

  jobs:
    build:
      runs-on: ubuntu-latest
+     strategy:
+       matrix:
+         ruby: [2.5, 2.6, 2.7]
+     name: Ruby ${{ matrix.ruby }}
      steps:
      - uses: actions/checkout@v2
      - name: Set up Ruby
        uses: ruby/setup-ruby@v1
        with:
-         ruby-version: 2.5.7
+         ruby-version: ${{ matrix.ruby }}
      - name: Run the default task