Add a TestCase mixin for enabling caches in tests

By default, disable all caching in tests, to preserve test independence.
In order to enable caching, inherit from CacheSetupMixin, and specify
which cache configuration is needed.

[EV-32]

cms/djangoapps/contentstore/management/commands/tests/test_force_publish.py

@@ -4,7 +4,7 @@ Tests for the force_publish management command
 import mock
 from django.core.management import call_command, CommandError
 from xmodule.modulestore import ModuleStoreEnum
-from xmodule.modulestore.tests.django_utils import SharedModuleStoreTestCase
+from xmodule.modulestore.tests.django_utils import SharedModuleStoreTestCase, ModuleStoreTestCase
 from xmodule.modulestore.tests.factories import CourseFactory, ItemFactory
 from contentstore.management.commands.force_publish import Command
 from contentstore.management.commands.utils import get_course_versions
@@ -62,7 +62,19 @@ class TestForcePublish(SharedModuleStoreTestCase):
         with self.assertRaisesRegexp(CommandError, errstring):
             call_command('force_publish', unicode(course.id))
 
-    @SharedModuleStoreTestCase.modifies_courseware
+
+class TestForcePublishModifications(ModuleStoreTestCase):
+    """
+    Tests for the force_publish management command that modify the courseware
+    during the test.
+    """
+
+    def setUp(self):
+        super(TestForcePublishModifications, self).setUp()
+        self.course = CourseFactory.create(default_store=ModuleStoreEnum.Type.split)
+        self.test_user_id = ModuleStoreEnum.UserID.test
+        self.command = Command()
+
     def test_force_publish(self):
         """
         Test 'force_publish' command

cms/djangoapps/contentstore/tests/tests.py

@@ -88,8 +88,9 @@ class ContentStoreTestCase(ModuleStoreTestCase):
 
 class AuthTestCase(ContentStoreTestCase):
     """Check that various permissions-related things work"""
-    
+
     CREATE_USER = False
+    ENABLED_CACHES = ['default', 'mongo_metadata_inheritance', 'loc_cache']
 
     def setUp(self):
         super(AuthTestCase, self).setUp()