docstr: Test if setting the ftol breaks the optimization process
docstr_tok: ["Test","if","setting","the","ftol","breaks","the","optimization","process"]
code: def test_ftol_effect(self, optimizer):
      """Test if setting the ftol breaks the optimization process"""
      # Set optimizer tolerance
      optimizer.ftol = 1e-1
      optimizer.optimize(sphere, 2000)
      assert np.array(optimizer.cost_history).shape != (2000,)
  
imports: import inspect
  import numpy
  import pytest
  import pyswarms.backend.topology
  from pyswarms.single import GeneralOptimizerPSO
  from pyswarms.utils.functions.single_obj import sphere
  from .abc_test_optimizer import ABCTestOptimizer
label_desc: Use image node_id 4 for calling the TestGeneralOptimizer obj's underlying member method code with example usage: obj.test_ftol_effect(optimizer) without return types