'* some detached items
* some attached children
* some orphans'

def _create_course(self, split=True):

    metadata = {'start': datetime.datetime(2000, 3, 13, 4), 'display_name': 'Migration    test    course'}
    data = {'wiki_slug': 'test_course_slug'}
    fields = metadata.copy()
    fields.update(data)
    if split:
        self.split_mongo.create_course(self.split_course_key.org, self.split_course_key.course, self.split_course_key.run, self.user_id, fields=fields, root_block_id='runid')
    old_course = self.draft_mongo.create_course(self.split_course_key.org, 'test_course', 'runid', self.user_id, fields=fields)
    self.old_course_key = old_course.id
    self.runtime = old_course.runtime
