from unittest import TestCase

from pecan.templating import RendererFactory

class TestTemplate(TestCase):
    def setUp(self):
        self.rf = RendererFactory()

    def test_available(self):
        self.assertTrue(self.rf.available('json'))
        self.assertFalse(self.rf.available('badrenderer'))

    def test_create_bad(self):
        self.assertEqual(self.rf.get('doesnotexist', '/'), None)

    def test_extra_vars(self):
        extra_vars = self.rf.extra_vars
        self.assertEqual(extra_vars.make_ns({}), {})

        extra_vars.update({'foo': 1})
        self.assertEqual(extra_vars.make_ns({}), {'foo':1})

    def test_update_extra_vars(self):
        extra_vars = self.rf.extra_vars
        extra_vars.update({'foo': 1})

        self.assertEqual(extra_vars.make_ns({'bar':2}), {'foo':1, 'bar':2})
        self.assertEqual(extra_vars.make_ns({'foo':2}), {'foo':2})