code: def test_color_image_unsupported_error():
      """Brief descriptors can be evaluated on gray-scale images only."""
      img = np.zeros((20, 20, 3))
      keypoints = np.asarray([[7, 5], [11, 13]])
      with testing.raises(ValueError):
          BRIEF().extract(img, keypoints)
  
file_path: scikit-image/skimage/feature/tests/test_brief.py
imports: import pytest
  import copy
  import numpy
  from skimage._shared.testing import assert_array_equal
  from skimage import data
  from skimage.feature import BRIEF, corner_peaks, corner_harris
  from skimage._shared import testing
label_desc: Use image node_id 1 for calling a global function with example usage: test_color_image_unsupported_error() without return types