code: def test_ellipse_perimeter_flat_zeroangle():
      # flat ellipse
      img = np.zeros((20, 18), "uint8")
      img_ = np.zeros((20, 18), "uint8")
      rr, cc = ellipse_perimeter(6, 7, 0, 5, 0)
      img[rr, cc] = 1
      rr, cc = line(6, 2, 6, 12)
      img_[rr, cc] = 1
      assert_array_equal(img, img_)
  
imports: import numpy
  from numpy.testing import assert_array_equal, assert_equal, assert_almost_equal
  import pytest
  from skimage._shared.testing import run_in_parallel
  from skimage._shared._dependency_checks import has_mpl
  from skimage.draw import set_color, line, line_aa, polygon, polygon_perimeter, disk, circle_perimeter, circle_perimeter_aa, ellipse, ellipse_perimeter, _bezier_segment, bezier_curve, rectangle, rectangle_perimeter
  from skimage.measure import regionprops
label_desc: Use image node_id 30 for calling a global function with example usage: test_ellipse_perimeter_flat_zeroangle() without return types