ci.yml

name: CI
on:
  pull_request:
  push:
    branches: [master]

jobs:
  tests:
    name: tests / ${{ matrix.os }} / ${{ matrix.python-version }}
    runs-on: ${{ matrix.os }}-latest

    strategy:
      matrix:
        os: [Windows, Ubuntu, MacOS]
        python-version: [3.6, 3.7, 3.8, 3.9]
        include:
          # Only run PyPy jobs, on Ubuntu.
          - os: Ubuntu
            python-version: pypy3

    steps:
      - uses: actions/checkout@v2

      # Get Python to test against
      - uses: actions/setup-python@v2
        with:
          python-version: ${{ matrix.python-version }}

      # Setup pip's cache
      - name: Save date (for cache)
        id: date
        run: echo "::set-output name=date::$(date +%F)"
      - name: Save pip cache dir
        id: pip-cache-dir
        run: echo "::set-output name=dir::$(pip cache dir)"
      - name: pip cache
        uses: actions/cache@v1
        with:
          path: ${{ steps.pip-cache-dir.outputs.dir }}
          key: pip-v1-${{ runner.os }}-${{ steps.date.outputs.date }}
          restore-keys: pip-v1-${{ runner.os }}

      - run: pip install nox
      - run: nox -s test-${{ matrix.python-version }}