code: def test_windbarb_draw():
      """Test drawing arrows without transforms"""
      with TestingCanvas(size=(250, 33), bgcolor="white") as c:
          Windbarb(
              pos=grid,
              wind=vectors,
              trig=False,
              edge_color="black",
              face_color="black",
              size=length,
              parent=c.scene,
          )
          assert_image_approved(c.render(), "visuals/windbarb.png")
  
imports: import numpy
  from vispy.scene.visuals import Windbarb
  from vispy.testing import requires_application, TestingCanvas, run_tests_if_main
  from vispy.testing.image_tester import assert_image_approved
label_desc: Use image node_id 1 for calling a global function with example usage: test_windbarb_draw() without return types