code: def test_draw_line_same_point():
      x0, y0 = (4, 4)
      x1, y1 = (4, 4)
      agg = new_agg()
      draw_segment(x0, y0, x1, y1, 0, True, agg)
      assert agg.sum() == 1
      assert agg[4, 4] == 1
      agg = new_agg()
      draw_segment(x0, y0, x1, y1, 0, False, agg)
      assert agg.sum() == 1
      assert agg[4, 4] == 1
  
      x0, y0 = (4, 4)
      x1, y1 = (10, 10)
      agg = new_agg()
      draw_segment(x0, y0, x1, y1, 0, True, agg)
      assert agg.sum() == 1
      assert agg[4, 4] == 1
      agg = new_agg()
      draw_segment(x0, y0, x1, y1, 0, False, agg)
      assert agg.sum() == 0
      assert agg[4, 4] == 0
  
imports: from __future__ import annotations
  import pandas
  import numpy
  import pytest
  from datashader.datashape import dshape
  from datashader.glyphs import Point, LinesAxis1, Glyph
  from datashader.glyphs.area import _build_draw_trapezoid_y
  from datashader.glyphs.line import _build_map_onto_pixel_for_line, _build_draw_segment, _build_extend_line_axis0
  from datashader.glyphs.trimesh import _build_map_onto_pixel_for_triangle, _build_draw_triangle, _build_extend_triangles
  from datashader.utils import ngjit
label_desc: Use image node_id 9 for calling a global function with example usage: test_draw_line_same_point() without return types