class_docstr: Tests the _preprocess_expand_fn helper function.
class_docstr_tok: ["Tests","the","_preprocess_expand_fn","helper","function","."]
docstr: Test that the expand_fn is blank if is new device.
docstr_tok: ["Test","that","the","expand_fn","is","blank","if","is","new","device","."]
code: def test_new_device_blank_expand_fn(self):
      """Test that the expand_fn is blank if is new device."""
  
      dev = DefaultQubit()
  
      out = _preprocess_expand_fn("device", dev, 10)
  
      x = [1]
      assert out(x) is x
  
file_path: pennylane/tests/interfaces/default_qubit_2_integration/test_execute_default_qubit_2.py
imports: import pytest
  import pennylane
  from pennylane import numpy
  from pennylane.workflow.execution import _preprocess_expand_fn
  from pennylane.devices import DefaultQubit
label_desc: Use image node_id 2 for calling the TestPreprocessExpandFn obj's underlying member method code with example usage: obj.test_new_device_blank_expand_fn() without return types