def METHOD_NAME(self):
    store = self.get_store(batch_size=50, serialization_format="firehose_v1")
    store.configured = True
    mock_client = Mock()
    mock_client.put_records.return_value = {"FailedRecordCount": 0}
    store.client = mock_client
    event = self.build_login_event()
    self.assertEqual(
        list(store.bulk_store([event])),
        [(str(event.metadata.uuid), event.metadata.index)]
    )