code: def test_to_device(setup):
      algo, _, _, _, _ = setup
      algo._qf.to = MagicMock(name="to")
      algo._target_qf.to = MagicMock(name="to")
  
      algo._qf.to.return_value = algo._qf
      algo._target_qf.to.return_value = algo._target_qf
  
      algo.to("cpu")
      algo._qf.to.assert_called_once_with("cpu")
      algo._target_qf.to.assert_called_once_with("cpu")
  
imports: import copy
  import tempfile
  from unittest.mock import MagicMock
  import pytest
  import torch
  from torch.nn import functional
  from garage.envs import GymEnv
  from garage.experiment import SnapshotConfig
  from garage.experiment.deterministic import set_seed
  from garage.np.exploration_policies import EpsilonGreedyPolicy
  from garage.replay_buffer import PathBuffer
  from garage.sampler import FragmentWorker, LocalSampler
  from garage.torch import np_to_torch
  from garage.torch.algos import DQN
  from garage.torch.policies import DiscreteQFArgmaxPolicy
  from garage.torch.q_functions import DiscreteMLPQFunction
  from garage.trainer import Trainer
  from tests.fixtures import snapshot_config
label_desc: Use image node_id 5 for calling a global function with example usage: test_to_device(setup) without return types