from pathlib import Path


def test_python_files_are_at_most_250_lines() -> None:
    root = Path(__file__).parents[1]
    files = [*root.glob("src/**/*.py"), *root.glob("tests/**/*.py")]
    oversized = {
        str(path.relative_to(root)): len(path.read_text().splitlines())
        for path in files
        if len(path.read_text().splitlines()) > 250
    }
    assert oversized == {}