code: def setUp(self):
      super(EpsilonGreedyPolicyTest, self).setUp()
      self.greedy_policy = mock.MagicMock()
      self.random_policy = mock.MagicMock()
      self.greedy_policy.time_step_spec = ts.time_step_spec()
      self.greedy_policy.action_spec = ()
      self.greedy_policy.info_spec = ()
      self.greedy_policy.policy_state_spec = ()
      self.random_policy.time_step_spec = ts.time_step_spec()
      self.random_policy.action_spec = ()
      self.random_policy.info_spec = ()
      self.random_policy.policy_state_spec = ()
      self.random_policy.action.return_value = policy_step.PolicyStep(
          0, ()
      )
  
file_path: agents/tf_agents/policies/py_epsilon_greedy_policy_test.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from absl.testing.absltest import mock
  from tf_agents.policies import py_epsilon_greedy_policy
  from tf_agents.trajectories import policy_step
  from tf_agents.trajectories import time_step
  from tf_agents.utils import test_utils
label_desc: Use image node_id 1 for calling the EpsilonGreedyPolicyTest obj's underlying member method code with example usage: obj.setUp() without return types