from app.off import parse_quantity


def test_grams():
    assert parse_quantity("500 g") == ("gram", 500)
    assert parse_quantity("500g") == ("gram", 500)


def test_kilograms_to_grams():
    assert parse_quantity("1 kg") == ("gram", 1000)
    assert parse_quantity("1,5 kg") == ("gram", 1500)


def test_liters_to_milliliters():
    assert parse_quantity("1 l") == ("milliliter", 1000)
    assert parse_quantity("0,5 l") == ("milliliter", 500)
    assert parse_quantity("33 cl") == ("milliliter", 330)
    assert parse_quantity("330 ml") == ("milliliter", 330)


def test_unparsable_is_piece():
    assert parse_quantity(None) == ("piece", None)
    assert parse_quantity("6 Stück") == ("piece", None)
    assert parse_quantity("") == ("piece", None)