tests.yml

name: Tests

# Runs on every push and pull request — meaning GitHub itself, without
# anyone touching anything by hand, runs the tests every time and shows
# the result on the repo page (with a green ✅ tick or a red ❌ cross).
on:
  push:
  pull_request:

jobs:
  test:
    runs-on: ubuntu-latest

    steps:
      - name: Check out the code
        uses: actions/checkout@v4

      - name: Set up Python
        uses: actions/setup-python@v5
        with:
          python-version: "3.12"

      - name: Install dependencies
        run: pip install -r requirements.txt

      - name: Run tests with the plain backend (subprocess)
        run: python -m unittest discover tests -v

      # GitHub Actions machines already have Docker installed —
      # no need to manually install Docker here.
      - name: Pull the Python image for the Docker backend
        run: docker pull python:3.12-slim

      - name: Run tests with the Docker backend (industry-standard isolation level)
        run: python -m unittest discover tests -v
        env:
          SANDBOX_BACKEND: docker