tests/docs/test_recipes.py

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import os
import subprocess
import sys
from pathlib import Path

import pytest

RECIPES_DIR = Path(__file__).parent / "recipes"
REPOSITORY_ROOT = Path(__file__).parents[2]


@pytest.mark.parametrize("recipe", sorted(RECIPES_DIR.glob("*.py")), ids=lambda path: path.stem)
def test_recipe_runs_in_isolation(recipe: Path, tmp_path: Path) -> None:
    env = os.environ.copy()
    python_path = env.get("PYTHONPATH")
    env["PYTHONPATH"] = os.pathsep.join(
        part for part in (str(REPOSITORY_ROOT), python_path) if part
    )

    result = subprocess.run(
        [sys.executable, str(recipe)],
        cwd=tmp_path,
        env=env,
        text=True,
        capture_output=True,
        check=False,
    )

    assert result.returncode == 0, result.stdout + result.stderr