code: def test_gen_candidates_scipy_warns_opt_failure(self):
      with warnings.catch_warnings(record=True) as ws:
          self.test_gen_candidates(options={"maxls": 1})
      expected_msg = (
          "Optimization failed within `scipy.optimize.minimize` with status 2"
          " and message ABNORMAL_TERMINATION_IN_LNSRCH."
      )
      expected_warning_raised = any(
          (
              issubclass(w.category, OptimizationWarning)
              and expected_msg in str(w.message)
              for w in ws
          )
      )
      self.assertTrue(expected_warning_raised)
  
imports: import math
  import warnings
  from unittest import mock
  import torch
  from botorch.acquisition import qExpectedImprovement, qKnowledgeGradient
  from botorch.exceptions.warnings import OptimizationWarning
  from botorch.fit import fit_gpytorch_mll
  from botorch.generation.gen import gen_candidates_scipy, gen_candidates_torch, get_best_candidates
  from botorch.models import SingleTaskGP
  from botorch.utils.testing import BotorchTestCase, MockAcquisitionFunction
  from gpytorch import settings
  from gpytorch.mlls.exact_marginal_log_likelihood import ExactMarginalLogLikelihood
  from scipy.optimize import OptimizeResult
label_desc: Use image node_id 10 for calling the TestGenCandidates obj's underlying member method code with example usage: obj.test_gen_candidates_scipy_warns_opt_failure() without return types