Ensure that the staticfiles tests use the MEDIA_ROOT they intended, also use a more approrpiate datastructure in collectstatic.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@14401 bcc190cf-cafb-0310-a4f2-bffc1f526a37

tests/regressiontests/staticfiles_tests/tests.py

@@ -7,12 +7,13 @@ from StringIO import StringIO
 
 from django.test import TestCase
 from django.conf import settings
+from django.contrib.staticfiles import finders, storage
+from django.core.files.storage import default_storage
 from django.core.exceptions import ImproperlyConfigured
 from django.core.management import call_command
 from django.db.models.loading import load_app
 from django.template import Template, Context
 
-from django.contrib.staticfiles import finders, storage
 
 TEST_ROOT = os.path.dirname(__file__)
 
@@ -54,6 +55,11 @@ class StaticFilesTestCase(TestCase):
             "regressiontests.staticfiles_tests",
         ]
 
+        # Clear the cached default_storage out, this is because when it first
+        # gets accessed (by some other test), it evaluates settings.MEDIA_ROOT,
+        # since we're planning on changing that we need to clear out the cache.
+        default_storage._wrapped = None
+
     def tearDown(self):
         settings.DEBUG = self.old_debug
         settings.MEDIA_ROOT = self.old_media_root