code: def test_greedy_actions(self):
      assertions.assertIsInstance(
          self.qout.greedy_actions, torch.Tensor
      )
      np.testing.assert_equal(
          self.qout.greedy_actions.numpy(), self.q_values.argmax(axis=1)
      )
  
imports: import unittest
  import numpy
  import pytest
  import torch
  from pfrl import action_value
  from pfrl.testing import torch_assert_allclose
label_desc: Use image node_id 3 for calling the TestDiscreteActionValue obj's underlying member method code with example usage: obj.test_greedy_actions() without return types