name: CI

on:
  push:
    branches: [ master ]
  pull_request:
    paths:
      - '**.js'
      - 'package.json'
      - '.github/workflows/ci.yml'

jobs:
  test:
    strategy:
      matrix:
        os: [ubuntu-latest, windows-latest, macOS-latest]
        node: [14.x, 12.x, 10.x]
        exclude:
          # On Windows, run tests with only the LTS environments.
          - os: windows-latest
            node: 10.x
          - os: windows-latest
            node: 14.x
          # On macOS, run tests with only the LTS environments.
          - os: macOS-latest
            node: 10.x
          - os: macOS-latest
            node: 14.x

    runs-on: ${{ matrix.os }}
    steps:
      - uses: actions/checkout@v2
      - uses: actions/setup-node@v1
        with:
          node-version: ${{ matrix.node-version }}

      - run: npm install

      - run: npm test -- --colors

      # upload coverage only once
      - name: Coveralls
        uses: coverallsapp/github-action@master
        if: matrix.node == '14.x' && matrix.os == 'ubuntu-latest'
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}