Gist that is part of a tutorial on Pytest features.

test_logging_example.py

def test_translate_animal_names(caplog):
    animals_in_french = ["lapin", "grenouille", "cheval"]
    french_english_translation = {
        "lapin": "rabbit",
        "cheval": "horse"
    }
    animals_in_english = translate_animal_names(
        animals_in_french,
        french_english_translation
    )
    assert animals_in_english == ["rabbit", "horse"]
    assert caplog.record_tuples == [
        (
            "root",
            logging.WARNING,
            "'grenouille' is not present in the translations provided."
        )
    ]