Refs #26666 -- Added ALLOWED_HOSTS validation when running tests.

Also used ALLOWED_HOSTS to check for external hosts in assertRedirects().

tests/cache/tests.py

@@ -1393,6 +1393,7 @@ class DefaultNonExpiringCacheKeyTests(SimpleTestCase):
         },
     },
     USE_I18N=False,
+    ALLOWED_HOSTS=['.example.com'],
 )
 class CacheUtils(SimpleTestCase):
     """TestCase for django.utils.cache functions."""

tests/sites_tests/tests.py

@@ -142,6 +142,7 @@ class SitesFrameworkTests(TestCase):
         with self.assertRaises(ValidationError):
             site.full_clean()
 
+    @override_settings(ALLOWED_HOSTS=['example.com'])
     def test_clear_site_cache(self):
         request = HttpRequest()
         request.META = {
@@ -162,7 +163,7 @@ class SitesFrameworkTests(TestCase):
         clear_site_cache(Site, instance=self.site, using='default')
         self.assertEqual(models.SITE_CACHE, {})
 
-    @override_settings(SITE_ID='')
+    @override_settings(SITE_ID='', ALLOWED_HOSTS=['example2.com'])
     def test_clear_site_cache_domain(self):
         site = Site.objects.create(name='example2.com', domain='example2.com')
         request = HttpRequest()
@@ -191,6 +192,7 @@ class SitesFrameworkTests(TestCase):
         self.assertEqual(Site.objects.get_by_natural_key(self.site.domain), self.site)
         self.assertEqual(self.site.natural_key(), (self.site.domain,))
 
+    @override_settings(ALLOWED_HOSTS=['example.com'])
     def test_requestsite_save_notimplemented_msg(self):
         # Test response msg for RequestSite.save NotImplementedError
         request = HttpRequest()
@@ -201,6 +203,7 @@ class SitesFrameworkTests(TestCase):
         with self.assertRaisesMessage(NotImplementedError, msg):
             RequestSite(request).save()
 
+    @override_settings(ALLOWED_HOSTS=['example.com'])
     def test_requestsite_delete_notimplemented_msg(self):
         # Test response msg for RequestSite.delete NotImplementedError
         request = HttpRequest()

tests/staticfiles_tests/test_liveserver.py

@@ -35,9 +35,9 @@ class LiveServerBase(StaticLiveServerTestCase):
 
     @classmethod
     def tearDownClass(cls):
+        super(LiveServerBase, cls).tearDownClass()
         # Restore original settings
         cls.settings_override.disable()
-        super(LiveServerBase, cls).tearDownClass()
 
 
 class StaticLiveServerChecks(LiveServerBase):

tests/test_client/tests.py

@@ -601,7 +601,13 @@ class ClientTest(TestCase):
         a relevant ValueError rather than a non-descript AssertionError.
         """
         response = self.client.get('/django_project_redirect/')
-        with self.assertRaisesMessage(ValueError, 'unable to fetch'):
+        msg = (
+            "The test client is unable to fetch remote URLs (got "
+            "https://www.djangoproject.com/). If the host is served by Django, "
+            "add 'www.djangoproject.com' to ALLOWED_HOSTS. "
+            "Otherwise, use assertRedirects(..., fetch_redirect_response=False)."
+        )
+        with self.assertRaisesMessage(ValueError, msg):
             self.assertRedirects(response, 'https://www.djangoproject.com/')
 
     def test_session_modifying_view(self):

tests/test_client_regress/tests.py

@@ -15,7 +15,8 @@ from django.template import (
 )
 from django.template.response import SimpleTemplateResponse
 from django.test import (
-    Client, SimpleTestCase, TestCase, ignore_warnings, override_settings,
+    Client, SimpleTestCase, TestCase, ignore_warnings, modify_settings,
+    override_settings,
 )
 from django.test.client import RedirectCycleError, RequestFactory, encode_file
 from django.test.utils import ContextList, str_prefix
@@ -455,6 +456,7 @@ class AssertRedirectsTests(SimpleTestCase):
         self.assertRedirects(response, '/no_template_view/', 302, 200)
         self.assertEqual(len(response.redirect_chain), 3)
 
+    @modify_settings(ALLOWED_HOSTS={'append': 'otherserver'})
     def test_redirect_to_different_host(self):
         "The test client will preserve scheme, host and port changes"
         response = self.client.get('/redirect_other_host/', follow=True)
@@ -467,6 +469,12 @@ class AssertRedirectsTests(SimpleTestCase):
         self.assertEqual(response.request.get('wsgi.url_scheme'), 'https')
         self.assertEqual(response.request.get('SERVER_NAME'), 'otherserver')
         self.assertEqual(response.request.get('SERVER_PORT'), '8443')
+        # assertRedirects() can follow redirect to 'otherserver' too.
+        response = self.client.get('/redirect_other_host/', follow=False)
+        self.assertRedirects(
+            response, 'https://otherserver:8443/no_template_view/',
+            status_code=302, target_status_code=200
+        )
 
     def test_redirect_chain_on_non_redirect_page(self):
         "An assertion is raised if the original page couldn't be retrieved as expected"