docstr: Test skeletonize on a 1-pixel thin strip
docstr_tok: ["Test","skeletonize","on","a","1-pixel","thin","strip"]
code: def test_narrow_image(self):
      """Test skeletonize on a 1-pixel thin strip"""
      image = np.zeros((1, 5), bool)
      image[:, 1:-1] = True
      result = medial_axis(image)
      assert np.all(result == image)
  
imports: import numpy
  import pytest
  from numpy.testing import assert_array_equal
  from scipy.ndimage import correlate
  from skimage import draw
  from skimage._shared.testing import fetch
  from skimage.io import imread
  from skimage.morphology import medial_axis, skeletonize, thin
  from skimage.morphology._skeletonize import G123_LUT, G123P_LUT, _generate_thin_luts
label_desc: Use image node_id 6 for calling the TestMedialAxis obj's underlying member method code with example usage: obj.test_narrow_image() without return types