matrix-ci.yml

name: Matrix CI

on:
  push:
    branches: [ master, feature/github-actions-practice ]
  pull_request:
    branches: [ master ]
  workflow_dispatch:

jobs:
  test:
    runs-on: ubuntu-latest
    
    strategy:
      matrix:
        node-version: [18, 20, 22]  # Test on 3 Node versions!
    
    steps:
    - name: Checkout code
      uses: actions/checkout@v4
    
    - name: Setup Node.js ${{ matrix.node-version }}
      uses: actions/setup-node@v4
      with:
        node-version: ${{ matrix.node-version }}
    
    - name: Install dependencies
      run: npm ci
    
    - name: Run tests
      run: npm test -- --passWithNoTests --watchAll=false
    
    - name: Build project
      run: npm run build
    
    - name: Display Node version
      run: |
        echo "Testing on Node.js ${{ matrix.node-version }}"
        node --version