    @Test
    public void assignMissionMessageReceivingTest() {

        AssignMissionMessage assignMissionMessage = new AssignMissionMessage();
        MissionDto mission = new MissionDto();
        assignMissionMessage.setMission(mission);

        String messageStr = messageConverter.parseMessageToString(assignMissionMessage);

        JsonBasedMessageConverter jsonBasedMessageConverter = new JsonBasedMessageConverter();
        Message message = jsonBasedMessageConverter.parseStringToMessage(messageStr);

        service.notifyMissionMessageReceivers(message);

        verify(messageReceiver).onAssignMissionMessageReceived(assignMissionMessage);
    }