code: def test_subclass(self):
      t = torch.zeros(20, dtype=torch.int16).view(torch.bits16)
      s = Int16Tensor(t)
      s = s + 1 - 1
      self.assertTrue(
          torch.allclose(s, torch.zeros(20, dtype=torch.bits16))
      )
  
file_path: pytorch/test/quantization/core/experimental/test_bits.py
imports: import torch
  from torch.testing._internal.common_device_type import instantiate_device_type_tests
  from torch.testing._internal.common_utils import run_tests, TestCase, skipIfRocm
  from torch.utils._mode_utils import no_dispatch
  from torch.utils._pytree import tree_map
  import itertools
label_desc: Use image node_id 3 for calling the TestBits obj's underlying member method code with example usage: obj.test_subclass() without return types