name: CI

on:
  push:
    branches:
      - master
  pull_request:
    branches:
      - master

jobs:
  build:
    runs-on: ubuntu-latest
    strategy:
      matrix:
        python-version: ['3.7', '3.8', '3.9', '3.10']

    steps:
    - uses: actions/checkout@v3
    - name: Set up Python ${{ matrix.python-version }}
      uses: actions/setup-python@v4
      with:
        python-version: ${{ matrix.python-version }}
    - uses: actions/cache@v3
      with:
        path: ~/.cache/pip
        key: ${{ runner.os }}-python-${{ matrix.python-version }}-pip-${{ hashFiles('.github/workflows/ci.yml') }}
        restore-keys: ${{ runner.os }}-python-${{ matrix.python-version }}-pip
    - name: Install dependencies
      run: |
        python -m pip install --upgrade pip
        python -m pip install tox tox-gh-actions
    - name: Lint
      if: matrix.python-version == '3.10'
      run: tox -e flake8
    - name: Tests
      run: tox