def METHOD_NAME(self):
    missing_case_ids = [uuid.uuid4().hex, uuid.uuid4().hex]
    changes = self._changes_from_ids(self.case_ids + missing_case_ids)
    bad_changes, result_docs = bulk_fetch_changes_docs(changes, 'domain')
    self.assertEqual(
        set(self.case_ids),
        set([doc['_id'] for doc in result_docs])
    )
    self.assertEqual(
        set(missing_case_ids),
        set([change.id for change in bad_changes])
    )