docstr: Test that the subnormal is zero warning is not being raised.
docstr_tok: ["Test","that","the","subnormal","is","zero","warning","is","not","being","raised","."]
code: def test_subnormal_warning(self):
      """Test that the subnormal is zero warning is not being raised."""
      ld_ma = _discovered_machar(np.longdouble)
      bytes = np.dtype(np.longdouble).itemsize
      with warnings.catch_warnings(record=True) as w:
          warnings.simplefilter("always")
          if (ld_ma.it, ld_ma.maxexp) == (63, 16384) and bytes in (
              12,
              16,
          ):
              # 80-bit extended precision
              ld_ma.smallest_subnormal
              assert len(w) == 0
          elif (ld_ma.it, ld_ma.maxexp) == (112, 16384) and bytes == 16:
              # IEE 754 128-bit
              ld_ma.smallest_subnormal
              assert len(w) == 0
          else:
              # Double double
              ld_ma.smallest_subnormal
              # This test may fail on some platforms
              assert len(w) == 0
  
imports: import functools
  import warnings
  from unittest import skipIf
  import numpy
  from pytest import raises
  from torch.testing._internal.common_utils import run_tests, TEST_WITH_TORCHDYNAMO, TestCase, xpassIfTorchDynamo
label_desc: Use image node_id 3 for calling the TestMisc obj's underlying member method code with example usage: obj.test_subnormal_warning() without return types