code: def test_neginf(self):
      assert neginf(torch.float32) < -1e15
      assert neginf(torch.float16) > -1e15
      assert neginf(torch.float16) < -1e4
  
imports: import torch
  import numpy
  import unittest
  from parlai.utils.torch import padded_tensor, argsort, PipelineHelper, neginf, IdentityLayer, trainable_parameters, total_parameters
label_desc: Use image node_id 1 for calling the TestTorchUtils obj's underlying member method code with example usage: obj.test_neginf() without return types