import pytest

from app.core.duration import parse_iso8601_duration


@pytest.mark.parametrize(
    "value,expected",
    [
        ("PT18M42S", 18 * 60 + 42),
        ("PT1H2M3S", 3600 + 120 + 3),
        ("PT45S", 45),
        ("PT5M", 300),
        ("P1DT2H", 86400 + 7200),
        (None, None),
        ("", None),
        ("garbage", None),
    ],
)
def test_parse_iso8601_duration(value, expected):
    assert parse_iso8601_duration(value) == expected