on:
  push:
  pull_request:

jobs:
  build:
    runs-on: ubuntu-18.04
    steps:
    - uses: actions/checkout@v1
    - uses: actions/setup-python@v1
      with:
        python-version: 3.7
    - run: pip install black==19.10b0
    - run: pip freeze
    - run: black --check .