class_docstr: Unit tests for the preprocessing method.
class_docstr_tok: ["Unit","tests","for","the","preprocessing","method","."]
docstr: Test that _accepted_operator works correctly
docstr_tok: ["Test","that","_accepted_operator","works","correctly"]
code: def test_accepted_operator(self, op, expected):
      """Test that _accepted_operator works correctly"""
      res = stopping_condition(op)
      assert res == expected
  
imports: import pytest
  import numpy
  import pennylane
  from pennylane.devices import DefaultQubit, ExecutionConfig
  from pennylane.devices.default_qubit import stopping_condition
label_desc: Use image node_id 6 for calling the TestPreprocessing obj's underlying member method code with example usage: obj.test_accepted_operator(op, expected) without return types