from __future__ import unicode_literals
import warnings

from django.core.urlresolvers import NoReverseMatch
from django.contrib.auth.views import logout
from django.shortcuts import resolve_url
from django.test import TestCase, override_settings
from django.utils.deprecation import RemovedInDjango20Warning

from .models import UnimportantThing


@override_settings(ROOT_URLCONF='resolve_url.urls')
class ResolveUrlTests(TestCase):
    """
    Tests for the ``resolve_url`` function.
    """

    def test_url_path(self):
        """
        Tests that passing a URL path to ``resolve_url`` will result in the
        same url.
        """
        self.assertEqual('/something/', resolve_url('/something/'))

    def test_relative_path(self):
        """
        Tests that passing a relative URL path to ``resolve_url`` will result
        in the same url.
        """
        self.assertEqual('../', resolve_url('../'))
        self.assertEqual('../relative/', resolve_url('../relative/'))
        self.assertEqual('./', resolve_url('./'))
        self.assertEqual('./relative/', resolve_url('./relative/'))

    def test_full_url(self):
        """
        Tests that passing a full URL to ``resolve_url`` will result in the
        same url.
        """
        url = 'http://example.com/'
        self.assertEqual(url, resolve_url(url))

    def test_model(self):
        """
        Tests that passing a model to ``resolve_url`` will result in
        ``get_absolute_url`` being called on that model instance.
        """
        m = UnimportantThing(importance=1)
        self.assertEqual(m.get_absolute_url(), resolve_url(m))

    def test_view_function(self):
        """
        Tests that passing a view name to ``resolve_url`` will result in the
        URL path mapping to that view name.
        """
        resolved_url = resolve_url(logout)
        self.assertEqual('/accounts/logout/', resolved_url)

    def test_valid_view_name(self):
        """
        Tests that passing a view function to ``resolve_url`` will result in
        the URL path mapping to that view.
        """
        with warnings.catch_warnings():
            warnings.filterwarnings("ignore", category=RemovedInDjango20Warning)
            resolved_url = resolve_url('django.contrib.auth.views.logout')
            self.assertEqual('/accounts/logout/', resolved_url)

    def test_domain(self):
        """
        Tests that passing a domain to ``resolve_url`` returns the same domain.
        """
        self.assertEqual(resolve_url('example.com'), 'example.com')

    def test_non_view_callable_raises_no_reverse_match(self):
        """
        Tests that passing a non-view callable into ``resolve_url`` raises a
        ``NoReverseMatch`` exception.
        """
        with self.assertRaises(NoReverseMatch):
            resolve_url(lambda: 'asdf')