text: import pytest
  
  from d3rlpy.argument_utility import (
      check_action_scaler,
      check_encoder,
      check_q_func,
      check_reward_scaler,
      check_scaler,
      check_use_gpu,
  )
  from d3rlpy.gpu import Device
  from d3rlpy.models.encoders import DefaultEncoderFactory
  from d3rlpy.models.q_functions import MeanQFunctionFactory
  from d3rlpy.preprocessing.action_scalers import MinMaxActionScaler
  from d3rlpy.preprocessing.reward_scalers import MinMaxRewardScaler
  from d3rlpy.preprocessing.scalers import MinMaxScaler
  
  
  @pytest.mark.parametrize("value", ["default", DefaultEncoderFactory()])
  def test_check_encoder(value):
      assert isinstance(check_encoder(value), DefaultEncoderFactory)
  
  
  @pytest.mark.parametrize("value", ["mean", MeanQFunctionFactory()])
  def test_check_q_func(value):
      assert isinstance(check_q_func(value), MeanQFunctionFactory)
  
  
  @pytest.mark.parametrize("value", ["min_max", MinMaxScaler(), None])
  def test_check_scaler(value):
      scaler = check_scaler(value)
      if value is None:
          assert scaler is None
      else:
          assert isinstance(scaler, MinMaxScaler)
  
  
  @pytest.mark.parametrize("value", ["min_max", MinMaxActionScaler(), None])
  def test_check_action_scaler(value):
      scaler = check_action_scaler(value)
      if value is None:
          assert scaler is None
      else:
          assert isinstance(scaler, MinMaxActionScaler)
  
  
  @pytest.mark.parametrize("value", ["min_max", MinMaxRewardScaler(), None])
  def test_check_reward_scaler(value):
      scaler = check_reward_scaler(value)
      if value is None:
          assert scaler is None
      else:
          assert isinstance(scaler, MinMaxRewardScaler)
  
  
  @pytest.mark.parametrize("value", [False, True, 0, Device(0)])
  def test_check_use_gpu(value):
      device = check_use_gpu(value)
      if type(value) == bool and value:
          assert device.get_id() == 0
      elif type(value) == bool and not value:
          assert device is None
      elif type(value) == int:
          assert device.get_id() == 0
      elif isinstance(value, Device):
          assert device.get_id() == 0
  