class_docstr: Tests involving setting up the execution config.
class_docstr_tok: ["Tests","involving","setting","up","the","execution","config","."]
docstr: Test that preprocessing chooses backprop as the best gradient method.
docstr_tok: ["Test","that","preprocessing","chooses","backprop","as","the","best","gradient","method","."]
code: def test_choose_best_gradient_method(self):
      """Test that preprocessing chooses backprop as the best gradient method."""
      config = qml.devices.ExecutionConfig(gradient_method="best")
      _, config = qml.device("default.qubit").preprocess(config)
      assert config.gradient_method == "backprop"
      assert config.use_device_gradient
      assert not config.grad_on_execution
  
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 1 for calling the TestConfigSetup obj's underlying member method code with example usage: obj.test_choose_best_gradient_method() without return types