code: def test_transition(self):
      env = suite_dm_control.load("ball_in_cup", "catch")
      env.reset()
      transition_time_step = env.step(np.array([0, 0]))
  
      self.assertTrue(transition_time_step.is_mid())
      self.assertNotEqual(None, transition_time_step.reward)
      self.assertEqual(1.0, transition_time_step.discount)
  
file_path: agents/tf_agents/environments/dm_control_wrapper_test.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import numpy
  from tf_agents.environments import suite_dm_control
  from tf_agents.utils import test_utils
label_desc: Use image node_id 4 for calling the DmControlWrapperTest obj's underlying member method code with example usage: obj.test_transition() without return types