class_docstr: Tests of input validation and output correctness of function `generate_shift_rule`.
class_docstr_tok: ["Tests","of","input","validation","and","output","correctness","of","function","`","generate_shift_rule","`","."]
docstr: Tests a warning is raised if the determinant of the matrix to be inverted is near zero
  for obtaining parameter shift rules for the non-equidistant frequency case.
code: def test_near_singular_warning(self):
      """Tests a warning is raised if the determinant of the matrix to be inverted is near zero
      for obtaining parameter shift rules for the non-equidistant frequency case.
      """
  
      frequencies = (1, 2, 3, 4, 5, 67)
  
      with pytest.warns(
          UserWarning,
          match="Solving linear problem with near zero determinant",
      ):
          generate_shift_rule(frequencies)
  
imports: import pytest
  import numpy
  import pennylane
  from pennylane.gradients.general_shift_rules import eigvals_to_frequencies, frequencies_to_period, generate_shift_rule, _get_shift_rule, generate_multi_shift_rule, generate_shifted_tapes, generate_multishifted_tapes, _iterate_shift_rule_with_multipliers
label_desc: Use image node_id 9 for calling the TestGenerateShiftRule obj's underlying member method code with example usage: obj.test_near_singular_warning() without return types