import pytest

import finoex
import ioex.calcex


def get_item_a(currency='EUR'):
    return finoex.Item(
        name='a',
        price_brutto=finoex.Sum(2.0, currency),
    )


def get_item_b():
    return finoex.Item(
        name='b',
        price_brutto=finoex.Sum(3.0, 'EUR'),
        sub_items=[get_item_a(), get_item_a()],
    )


@pytest.mark.parametrize(('items', 'expected_total'), [
    [[], 0],
    [[get_item_a()], finoex.Sum(2.0, 'EUR')],
    [[get_item_b()], finoex.Sum(7.0, 'EUR')],
    [[get_item_a(), get_item_b()], finoex.Sum(9.0, 'EUR')],
])
def test_get_items_total_price_brutto(items, expected_total):
    c = finoex._ItemCollection(items=items)
    assert expected_total == c.items_total_price_brutto


@pytest.mark.parametrize(('items'), [
    [get_item_a(currency='EUR'), get_item_a(currency='USD')],
])
def test_get_items_total_price_brutto_fail(items):
    c = finoex._ItemCollection(items=items)
    with pytest.raises(ioex.calcex.UnitMismatchError):
        c.items_total_price_brutto