code: def test_histogram_registration():
      """Test the histogram registration class."""
      I = make_xyz_image(make_data_int16(), dummy_affine, "scanner")
      J = make_xyz_image(I.get_fdata().copy(), dummy_affine, "scanner")
      R = HistogramRegistration(I, J)
      pytest.raises(ValueError, R.subsample, spacing=[0, 1, 3])
  
imports: import numpy
  import pytest
  from numpy.testing import assert_array_equal
  from ....core.image.image_spaces import make_xyz_image
  from ....testing import assert_almost_equal
  from .._registration import _joint_histogram
  from ..affine import Affine, Rigid
  from ..histogram_registration import HistogramRegistration
label_desc: Use image node_id 27 for calling a global function with example usage: test_histogram_registration() without return types