code: def test_integration_stiff(method):
      rtol = 1e-6
      atol = 1e-6
      y0 = [1e4, 0, 0]
      tspan = [0, 1e8]
  
      def fun_robertson(t, state):
          x, y, z = state
          return [
              -0.04 * x + 1e4 * y * z,
              0.04 * x - 1e4 * y * z - 3e7 * y * y,
              3e7 * y * y,
          ]
  
      res = solve_ivp(
          fun_robertson, tspan, y0, rtol=rtol, atol=atol, method=method
      )
  
      # If the stiff mode is not activated correctly, these numbers will be much bigger
      assert res.nfev < 5000
      assert res.njev < 200
  
imports: from itertools import product
  from numpy.testing import assert_, assert_allclose, assert_array_less, assert_equal, assert_no_warnings, suppress_warnings
  import pytest
  from pytest import raises
  import numpy
  from scipy.optimize._numdiff import group_columns
  from scipy.integrate import solve_ivp, RK23, RK45, DOP853, Radau, BDF, LSODA
  from scipy.integrate import OdeSolution
  from scipy.integrate._ivp.common import num_jac
  from scipy.integrate._ivp.base import ConstantDenseOutput
  from scipy.sparse import coo_matrix, csc_matrix
label_desc: Use image node_id 24 for calling a global function with example usage: test_integration_stiff(method) and returns: list