class ActiveLinkTest(TestCase):

    def get_context_for_view(self, view, *args, **kwargs):

        """

        Returns a Context instance where the request path has been

        constructed using the passed-in view (or view name), and view

        positional/keyword arguments.

        Arguments:

          view

            View function or name for request object.

          args

            Positional arguments to pass into the view.

          kwargs

            Keyword arguments to pass into the view.

        Returns:

          django.template.Context instance with request.

        """

        request = create_get_request(reverse(view, args=args, kwargs=kwargs))

        context = Context({'request': request})

        return context

    def test_empty_string_returned_on_view_without_arguments_and_no_match(self):

        context = self.get_context_for_view('index')

        self.assertEqual(active_link(context, 'project_create'), '')

    def test_default_value_returned_on_view_without_arguments_and_match(self):

        context = self.get_context_for_view('index')

        self.assertEqual(active_link(context, 'index'), 'active')

    def test_empty_string_returned_on_view_with_positional_arguments_and_no_match(self):

        context = self.get_context_for_view('project', 1)

        self.assertEqual(active_link(context, 'project', 'active', 2), '')

    def test_value_returned_on_view_with_positional_arguments_and_match(self):

        context = self.get_context_for_view('project', 1)

        self.assertEqual(active_link(context, 'project', 'active', 1), 'active')

    def test_empty_string_returned_on_view_with_keyword_arguments_and_no_match(self):

        context = self.get_context_for_view('project', 1)

        self.assertEqual(active_link(context, 'project', pk=2), '')

    def test_default_value_returned_on_view_with_keyword_arguments_and_match(self):

        context = self.get_context_for_view('project', 1)

        self.assertEqual(active_link(context, 'project', pk=1), 'active')

    def test_provided_value_returned_on_view_with_matching_url(self):

        context = self.get_context_for_view('project', 1)

        self.assertEqual(active_link(context, 'project', 'myvalue', 1), 'myvalue')

        self.assertEqual(active_link(context, 'project', 'myvalue', pk=1), 'myvalue')