##############################################################################
#
# Copyright (c) 2001, 2002 Zope Foundation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.
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# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
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"""Language Negotiator tests.
"""
import unittest

from zope.i18n.negotiator import Negotiator
from zope.i18n.interfaces import IUserPreferredLanguages
from zope.component.testing import PlacelessSetup
from zope.interface import implementer


@implementer(IUserPreferredLanguages)
class Env(object):

    def __init__(self, langs=()):
        self.langs = langs

    def getPreferredLanguages(self):
        return self.langs


class NegotiatorTest(PlacelessSetup, unittest.TestCase):

    def setUp(self):
        super(NegotiatorTest, self).setUp()
        self.negotiator = Negotiator()

    def test_findLanguages(self):

        _cases = (
            (('en', 'de'), ('en', 'de', 'fr'), 'en'),
            (('en'), ('it', 'de', 'fr'), None),
            (('pt-br', 'de'), ('pt_BR', 'de', 'fr'), 'pt_BR'),
            (('pt-br', 'en'), ('pt', 'en', 'fr'), 'pt'),
            (('pt-br', 'en-us', 'de'), ('de', 'en', 'fr'), 'en'),
        )

        for user_pref_langs, obj_langs, expected in _cases:
            env = Env(user_pref_langs)
            self.assertEqual(self.negotiator.getLanguage(obj_langs, env),
                             expected)


def test_suite():
    return unittest.TestSuite((
        unittest.makeSuite(NegotiatorTest),
    ))