code: def test_vertical_downward():
      prof = profile_line(
          image, (2, 5), (8, 5), order=0, mode="constant"
      )
      expected_prof = np.arange(25, 95, 10)
      assert_equal(prof, expected_prof)
  
imports: import numpy
  from ..._shared.testing import assert_equal, assert_almost_equal
  from ..profile import profile_line
label_desc: Use image node_id 3 for calling a global function with example usage: test_vertical_downward() without return types