code: def test_default():
      im = hopper("P")
      assert im.mode == "P"
      converted_im = im.convert()
      assert_image(converted_im, "RGB", im.size)
      converted_im = im.convert()
      assert_image(converted_im, "RGB", im.size)
  
      im.info["transparency"] = 0
      converted_im = im.convert()
      assert_image(converted_im, "RGBA", im.size)
  
imports: from __future__ import annotations
  import pytest
  from PIL import Image
  from .helper import assert_image, assert_image_equal, assert_image_similar, hopper
label_desc: Use image node_id 3 for calling a global function with example usage: test_default() without return types