'Similar to `test_export_course_with_metadata_only_video`.'

def test_export_course_with_metadata_only_word_cloud(self):

    content_store = contentstore()
    import_course_from_xml(self.store, self.user.id, TEST_DATA_DIR, ['word_cloud'], create_if_not_present=True)
    course_id = self.store.make_course_key('HarvardX', 'ER22x', '2013_Spring')
    verticals = self.store.get_items(course_id, qualifiers={'category': 'vertical'})
    self.assertGreater(len(verticals), 0)
    parent = verticals[0]
    ItemFactory.create(parent_location=parent.location, category='word_cloud', display_name='untitled')
    root_dir = path(mkdtemp_clean())
    print 'Exporting    to    tempdir    =    {0}'.format(root_dir)
    export_course_to_xml(self.store, content_store, course_id, root_dir, 'test_export')
    shutil.rmtree(root_dir)
