Alexander Junge's website

This weekend, I set up my first GitHub Action to run continuous integration using Pytest for one of my repositories. Dependencies and virtual environment managment is done via Poetry.

For example, the following file, placed in .github/workflows/python-app.yml of a GitHub repository, does the following:

1. checkout the repository
2. install Python
3. install Poetry
4. install dependencies using Poetry in a virtual environment
5. run pytest against a local test suite in tests/
6. Run the above for both Python 3.8 and 3.9.

name: Python application

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

jobs:
  build:
    strategy:
      fail-fast: false
      matrix:
        python-version: [3.8, 3.9]
        poetry-version: [1.1.4]

    runs-on: ubuntu-latest

    steps:
    - uses: actions/checkout@v2

    - name: Set up Python ${{ matrix.python-version }}
      uses: actions/setup-python@v2
      with:
        python-version: ${{ matrix.python-version }}

    - name: Install poetry ${{ matrix.poetry-version }}
      run: |
        python -m ensurepip
        python -m pip install --upgrade pip
        python -m pip install poetry==${{ matrix.poetry-version }}

    - name: View poetry --help
      run: poetry --help

    - name: Install dependencies
      shell: bash
      run: python -m poetry install

    - name: Test with pytest
      run: |
        python -m poetry run python -m pytest -v tests

For more information, see for example a GitHub repo here using the mechanism.