code: def test_failure(self):
      model = Model()
      with self.assertRaises(RuntimeError):
          save_file(model.state_dict(), "tmp.safetensors")
  
imports: import copy
  import unittest
  import torch
  from safetensors import safe_open
  from safetensors.torch import _end_ptr, _find_shared_tensors, _is_complete, _remove_duplicate_names, load_model, save_file, save_model
label_desc: Use image node_id 6 for calling the TorchModelTestCase obj's underlying member method code with example usage: obj.test_failure() without return types