code: def test_open_gray_scale_image_returns_array_with_3_stacked_grayscale_channels(
      samples_source, fn
  ):
      image = open_gray_scale_image(samples_source / fn)
  
      assert image.shape[-1] == 3
  
imports: import pytest
  from icevision.all import *
  from icevision.utils.imageio import open_gray_scale_image
label_desc: Use image node_id 13 for calling a global function with example usage: test_open_gray_scale_image_returns_array_with_3_stacked_grayscale_channels(samples_source, fn) without return types