Fixed #16224 -- Fixed override_settings test utility to correctly work with TestCase classes.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@16377 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/test/utils.py

@@ -197,11 +197,21 @@ class override_settings(object):
     def __exit__(self, exc_type, exc_value, traceback):
         self.disable()
 
-    def __call__(self, func):
-        @wraps(func)
+    def __call__(self, test_func):
+        from django.test import TestCase
+        if isinstance(test_func, type) and issubclass(test_func, TestCase):
+            class inner(test_func):
+                def _pre_setup(innerself):
+                    self.enable()
+                    super(inner, innerself)._pre_setup()
+                def _post_teardown(innerself):
+                    super(inner, innerself)._post_teardown()
+                    self.disable()
+        else:
+            @wraps(test_func)
             def inner(*args, **kwargs):
                 with self:
-                return func(*args, **kwargs)
+                    return test_func(*args, **kwargs)
         return inner
 
     def enable(self):

tests/regressiontests/settings_tests/tests.py

 from __future__ import with_statement
-import os, sys
+import os
 from django.conf import settings, global_settings
 from django.test import TestCase, signals
 from django.test.utils import override_settings
-from django.utils.unittest import skipIf
 
 
+# @override_settings(TEST='override')
+class FullyDecoratedTestCase(TestCase):
+
+    def test_override(self):
+        self.assertEqual(settings.TEST, 'override')
+
+    @override_settings(TEST='override2')
+    def test_method_override(self):
+        self.assertEqual(settings.TEST, 'override2')
+
+FullyDecoratedTestCase = override_settings(TEST='override')(FullyDecoratedTestCase)
+
 class SettingGetter(object):
     def __init__(self):
         self.test = getattr(settings, 'TEST', 'undefined')