import unittest
from zope.i18nmessageid.message import Message as i18nMessage
from zope.interface.verify import verifyObject
from zope.schema.interfaces import IVocabularyTokenized, ITerm
from waeup.ikoba.payments.currencies import (
    get_decimal_units, ISO_4217_CURRENCIES, ISO_4217_CURRENCIES_VOCAB,
    )


class CurrenciesTests(unittest.TestCase):

    def test_get_decimal_units(self):
        # we can get the number of decimals for a currency code
        assert get_decimal_units('USD') == 2
        assert get_decimal_units('JPY') == 0

    def test_iso_currencies_no_linebreak(self):
        # sanity check: make sure we didn't compile linebreaks
        for key, value in ISO_4217_CURRENCIES.items():
            assert '\n' not in key
            assert '\n' not in value[0]
            assert '\n' not in value[1]

    def test_iso_currencies_types(self):
        # sanity check: make sure we have the correct types in all tuples
        for key, value in ISO_4217_CURRENCIES.items():
            assert isinstance(value[1], i18nMessage)
            assert isinstance(value[2], int)
            assert isinstance(value[3], str)

    def test_currencies_vocab_tokenized(self):
        # we can get ISO currencies as a source suitable for forms etc.
        verifyObject(IVocabularyTokenized, ISO_4217_CURRENCIES_VOCAB)

    def test_currencies_vocab_i18nized(self):
        # vocab titles are i18nized
        result = ISO_4217_CURRENCIES_VOCAB.getTerm('USD')
        assert ITerm.providedBy(result)
        self.assertEqual(result.title, u'US Dollar')
        assert isinstance(result.title, i18nMessage)

    def test_currencies_vocab_tokens_are_string(self):
        # vocab tokens are simple strings
        result = ISO_4217_CURRENCIES_VOCAB.getTerm('USD')
        assert ITerm.providedBy(result)
        assert result.token == result.value
        assert result.value == 'USD'
        assert isinstance(result.token, str)
        assert isinstance(result.value, str)