class_docstr: Unit tests for QLearning.
class_docstr_tok: ["Unit","tests","for","QLearning","."]
code: def test_init_unsupported_q(self, mock_parameters):
      instance = mock_parameters.return_value
      instance.q_representation = "undefined"
      instance.preprocessing = ""
  
      action_space = spaces.Discrete(2)
      observation_space = spaces.Box(0, 1, (1,))
      self.assertRaises(
          ValueError, QLearning, "", observation_space, action_space
      )
  
imports: import unittest
  import cntk.contrib.deeprl.tests.spaces
  import numpy
  from cntk.contrib.deeprl.agent.qlearning import QLearning
  from cntk.contrib.deeprl.agent.shared.cntk_utils import huber_loss
  from cntk.contrib.deeprl.agent.shared.replay_memory import _Transition
  from cntk.layers import Dense
  from cntk.losses import squared_error
  from cntk.ops import input_variable
label_desc: Use image node_id 6 for calling the QLearningTest obj's underlying member method code with example usage: obj.test_init_unsupported_q(mock_parameters) without return types