test_versions.py

import warnings
from typing import Any

import pytest

import polars as pl


@pytest.mark.slow
def test_show_versions(capsys: Any) -> None:
    with warnings.catch_warnings():
        # Ignore DeprecationWarnings from dependency imports.
        warnings.simplefilter("ignore", DeprecationWarning)
        pl.show_versions()

    out, _ = capsys.readouterr()
    assert "Python" in out
    assert "Polars" in out
    assert "Runtime" in out
    assert "Optional dependencies" in out