"""Test format error util."""

from payment.constants.error import ERROR_UNKNOWN_CURRENCY
from payment.utils.format_error import validate_currency, validation_error


def test_validate_currency():
    """Test currency validation."""
    valid_currency = validate_currency('GBP')
    invalid_currency = validate_currency('BLM')

    assert valid_currency is None
    assert invalid_currency.status == 400
    assert invalid_currency.errors['message'] == ERROR_UNKNOWN_CURRENCY.format(
        code='BLM'
    )


def test_validation_error():
    """Test validation error creates an error response."""
    error = validation_error('Fake News')
    assert error.errors['code'] == 'error'
    assert error.errors['message'] == 'Fake News'
    assert error.status == 400