code: def test_unary_op_tensors_on_different_devices(
      self, device, dtype, op
  ):
      method, ref, inplace_method, ref_inplace = self._get_funcs(op)
      # tensors: ['cuda', 'cpu]
      tensors = next(
          iter(op.sample_inputs(device, dtype, num_input_tensors=[2]))
      ).input
      tensors[1] = tensors[1].to("cpu")
      if not op.supports_out:
          try:
              actual = method((tensors,), False, False, zero_size=False)
          except RuntimeError as e:
              with self.assertRaisesRegex(type(e), str(e)):
                  ref((tensors,))
          else:
              expected = ref((tensors,))
              self.assertEqual(expected, actual)
  
      try:
          inplace_method((tensors,), False, False, zero_size=False)
      except RuntimeError as e:
          with self.assertRaisesRegex(type(e), str(e)):
              ref_inplace((tensors,))
      else:
          if not op.supports_out:
              self.assertEqual(expected, tensors)
          else:
              self.assertEqual(
                  [torch.zeros_like(t) for t in tensors], tensors
              )
  
imports: from contextlib import nullcontext
  from numbers import Number
  import random
  import re
  import torch
  import unittest
  import itertools
  import weakref
  from torch.testing import make_tensor
  from torch.testing._comparison import default_tolerances
  from torch.testing._internal.common_cuda import TEST_MULTIGPU
  from torch.testing._internal.common_utils import TestCase, run_tests, TEST_WITH_ROCM, skipIfTorchDynamo, parametrize, gradcheck
  from torch.testing._internal.common_device_type import instantiate_device_type_tests, dtypes, onlyCUDA, ops, OpDTypes
  from torch.testing._internal.common_methods_invocations import foreach_unary_op_db, foreach_binary_op_db, foreach_pointwise_op_db, foreach_reduce_op_db, foreach_other_op_db
  from torch.testing._internal.common_dtype import all_types_and_complex_and, floating_types_and, floating_types, integral_types_and
label_desc: Use image node_id 15 for calling the TestForeach obj's underlying member method code with example usage: obj.test_unary_op_tensors_on_different_devices(device, dtype, op) without return types