"""Test currency util."""

import pytest

from ledger.constants.error import ERROR_UNKNOWN_CURRENCY
from ledger.utils.currency import currency_exists, validate_currency


def test_currency_exists():
    """Test currency_exists."""
    assert currency_exists('USD')
    assert not currency_exists(1)
    assert currency_exists('EUR')
    assert currency_exists('usd')


def test_validate_currency():
    """Test currency validation."""
    valid_currency = validate_currency('EUR')
    assert valid_currency is None

    with pytest.raises(Exception, match=ERROR_UNKNOWN_CURRENCY.format(code='NYC')):
        validate_currency('NYC')