from django.template import TemplateSyntaxError

from django.test import SimpleTestCase

from ...utils import setup

class GetAvailableLanguagesTagTests(SimpleTestCase):

    libraries = {"i18n": "django.templatetags.i18n"}

    @setup(

        {

            "i18n12": "{% load i18n %}"

            "{% get_available_languages as langs %}{% for lang in langs %}"

            '{% if lang.0 == "de" %}{{ lang.0 }}{% endif %}{% endfor %}'

        }

    )

    def test_i18n12(self):

        output = self.engine.render_to_string("i18n12")

        self.assertEqual(output, "de")

    @setup({"syntax_i18n": "{% load i18n %}{% get_available_languages a langs %}"})

    def test_no_as_var(self):

        msg = (

            "'get_available_languages' requires 'as variable' (got "

            "['get_available_languages', 'a', 'langs'])"

        )

        with self.assertRaisesMessage(TemplateSyntaxError, msg):

            self.engine.render_to_string("syntax_i18n")