code: def test_scharr_v_zeros():
      """Vertical Scharr on an array of all zeros."""
      result = filters.scharr_v(
          np.zeros((10, 10)), np.ones((10, 10), dtype=bool)
      )
      assert_allclose(result, 0)
  
imports: import numpy
  import pytest
  from numpy.testing import assert_, assert_allclose, assert_array_almost_equal
  from skimage import data, filters
  from skimage._shared.utils import _supported_float_type
  from skimage.filters.edges import _mask_filter_result
label_desc: Use image node_id 25 for calling a global function with example usage: test_scharr_v_zeros() without return types