code: def test_max(self):
      if not self.has_maximizer:
          return
      assertions.assertIsInstance(self.av.max, torch.Tensor)
      np.testing.assert_almost_equal(
          self.av.max.numpy(), self.evaluator(self.maximizer()).numpy()
      )
  
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 2 for calling the TestSingleActionValue obj's underlying member method code with example usage: obj.test_max() without return types