class_docstr: Tests for the finite_diff_coeffs function
class_docstr_tok: ["Tests","for","the","finite_diff_coeffs","function"]
docstr: Test that the correct centered order 2 method is returned
code: def test_correct_center_order2(self):
      """Test that the correct centered order 2 method is returned"""
      coeffs, shifts = finite_diff_coeffs(1, 2, "center")
      assert np.allclose(coeffs, [-0.5, 0.5])
      assert np.allclose(shifts, [-1, 1])
  
imports: import numpy
  import pytest
  import pennylane
  from pennylane import numpy
  from pennylane.devices import DefaultQubitLegacy
  from pennylane.gradients import finite_diff, finite_diff_coeffs
  from pennylane.operation import AnyWires, Observable
label_desc: Use image node_id 6 for calling the TestCoeffs obj's underlying member method code with example usage: obj.test_correct_center_order2() without return types