@Test
public void sendMessage() {

    //given
    //when
    deliveryNotificationSenderManager.sendMessage(delivery);
    //then
    verify(deliveryKakaoNotificationSender, atLeastOnce()).send(any(DeliveryMessageDto.Message.class));
    verify(deliverySmsNotificationSender, atLeastOnce()).send(any(DeliveryMessageDto.Message.class));
}