code: def test_point_validate():
      p = Point("x", "y")
      p.validate(dshape("{x: int32, y: float32}"))
      with pytest.raises(ValueError):
          p.validate(dshape("{x: string, y: float32}"))
  
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 2 for calling a global function with example usage: test_point_validate() without return types