fix test to use the new create_item method rather than clone_item, which has been deprecated, and thus breaking the test

cms/djangoapps/contentstore/tests/test_contentstore.py

@@ -816,12 +816,9 @@ class ContentStoreToyCourseTest(ModuleStoreTestCase):
 
         self.assertGreater(len(verticals), 0)
 
-        new_component_location = Location('i4x', 'edX', 'toy', 'video', 'new_component')
-        source_template_location = Location('i4x', 'edx', 'templates', 'video', 'default')
-
-        module_store.clone_item(source_template_location, new_component_location)
         parent = verticals[0]
-        module_store.update_children(parent.location, parent.children + [new_component_location.url()])
+
+        ItemFactory.create(parent_location=parent.location, category="video", display_name="untitled")
 
         root_dir = path(mkdtemp_clean())
 

common/lib/xmodule/xmodule/video_module.py

@@ -133,7 +133,7 @@ class VideoDescriptor(VideoFields,
         Override the base implementation. We don't actually have anything in the 'data' field
         (it's an empty string), so we just return a simple XML element
         """
-        return etree.fromstring('<video />')
+        return etree.Element('video')
 
 
 def _parse_video_xml(video, xml_data):