code: def test_rgba_quantize():
      image = hopper("RGBA")
      with pytest.raises(ValueError):
          image.quantize(method=0)
  
      assert image.quantize().convert().mode == "RGBA"
  
file_path: pillow/Tests/test_image_quantize.py
imports: from __future__ import annotations
  import pytest
  from packaging.version import parse
  from PIL import Image, features
  from .helper import assert_image_similar, hopper, is_ppc64le, skip_unless_feature
label_desc: Use image node_id 4 for calling a global function with example usage: test_rgba_quantize() without return types