import pytest

from article_data_manager.validation.numbers import parse_decimal


def test_parse_decimal_accepts_comma_decimal() -> None:
    assert parse_decimal("6,00") == 6.0


def test_parse_decimal_accepts_point_decimal() -> None:
    assert parse_decimal("1.20") == 1.2


def test_parse_decimal_maps_empty_value_to_none() -> None:
    assert parse_decimal("") is None


def test_parse_decimal_rejects_ambiguous_number() -> None:
    with pytest.raises(ValueError):
        parse_decimal("1.234,56")