code: def test_bounds_checking(self):
      # test that the bounds checking works
      func = rosen
      bounds = [(-3)]
      assert_raises(ValueError, differential_evolution, func, bounds)
      bounds = [(-3, 3), (3, 4, 5)]
      assert_raises(ValueError, differential_evolution, func, bounds)
  
      # test that we can use a new-type Bounds object
      result = differential_evolution(rosen, Bounds([0, 0], [2, 2]))
      assert_almost_equal(result.x, (1.0, 1.0))
  
imports: import multiprocessing
  import platform
  from scipy.optimize._differentialevolution import DifferentialEvolutionSolver, _ConstraintWrapper
  from scipy.optimize import differential_evolution
  from scipy.optimize._constraints import Bounds, NonlinearConstraint, LinearConstraint
  from scipy.optimize import rosen
  from scipy.sparse import csr_matrix
  from scipy._lib._pep440 import Version
  import numpy
  from numpy.testing import assert_equal, assert_allclose, assert_almost_equal, assert_array_equal, assert_string_equal, assert_, suppress_warnings
  from pytest import raises, warns
  import pytest
label_desc: Use image node_id 19 for calling the TestDifferentialEvolutionSolver obj's underlying member method code with example usage: obj.test_bounds_checking() without return types