text: from cucopy import tools
  from cucopy.components import settings, exchange
  
  from cucopy import tools
  from cucopy.components import settings, exchange
  
  # VALID: 1,2
  # INVALID: 3-7
  
  import datetime
  
  configs = [
      ["USA", "CAN", settings.WORLD_ER, 1, "1997-09-23", 10],
      ["USA", "CAN", settings.WORLD_ER, 1, None, 10],
      ["ABC", "CAN", settings.WORLD_ER, 1, "2010-09-23", 10],
      ["USA", "ABC", settings.WORLD_ER, 1, "2010-09-23", 10],
      ["USA", "CAN", settings.WORLD_ER, 1, "2010-13-32", 10],
      ["USA", "CAN", settings.WORLD_ER, 1, "2032-09-12", 10],
      ["USA", "CAN", settings.WORLD_ER, -1, "2010-09-23", 10]
  ]
  
  #from_country_code, to_country_code, filename_, value=1, date=None
  
  def test_working_param():
      conf = configs[0]
      print(exchange.get_exchanged_value(
              from_country_code=conf[0], 
              to_country_code=conf[1], 
              filename_=conf[2],
              value=conf[3],
              date=datetime.datetime.strptime(conf[4], '%Y-%m-%d').date()))
  
  test_working_param()
  