name: run tests

on:
  push:
    branches: [ master ]
  pull_request:
    branches: [ master ]
  schedule:
    - cron: '0 12 * * 0'  # run once a week on Sunday

jobs:
  build:
    strategy:
      matrix:
        config:
        # [name, Python version, tox env]
        - ["lint",     "3.8",   "lint"]
        - ["2.7",      "2.7",   "py27"]
        - ["3.5",      "3.5",   "py35"]
        - ["3.6",      "3.6",   "py36"]
        - ["3.7",      "3.7",   "py37"]
        - ["3.8",      "3.8",   "py38"]
        - ["3.9",      "3.9",   "py39"]
        - ["pypy2",    "pypy2", "pypy"]
        - ["pypy3",    "pypy3", "pypy3"]
        - ["coverage", "3.8",   "coverage"]

    runs-on: ubuntu-latest
    name: ${{ matrix.config[0] }}
    steps:
    - uses: actions/checkout@v2
    - name: Set up Python
      uses: actions/setup-python@v2
      with:
        python-version: ${{ matrix.config[1] }}
    - name: Pip cache
      uses: actions/cache@v2
      with:
        path: ~/.cache/pip
        key: ${{ runner.os }}-pip-${{ hashFiles('setup.*', 'tox.ini') }}
        restore-keys: |
          ${{ runner.os }}-pip-
    - name: Install dependencies
      run: |
        python -m pip install --upgrade pip
        pip install tox coveralls coverage-python-version
    - name: Test
      run: tox -e ${{ matrix.config[2] }}
    - name: Coverage
      if: matrix.config[2] == 'coverage'
      run: coveralls
      env:
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}