code: def test_dump(self, tmp_path):
      im = Image.new("L", (10, 10))
      im._dump(str(tmp_path / "temp_L.ppm"))
  
      im = Image.new("RGB", (10, 10))
      im._dump(str(tmp_path / "temp_RGB.ppm"))
  
      im = Image.new("HSV", (10, 10))
      with pytest.raises(ValueError):
          im._dump(str(tmp_path / "temp_HSV.ppm"))
  
imports: import io
  import os
  import shutil
  import sys
  import tempfile
  import pytest
  from PIL import Image, ImageDraw, ImagePalette, UnidentifiedImageError
  from .helper import assert_image_equal, assert_image_equal_tofile, assert_image_similar_tofile, assert_not_all_same, hopper, is_win32, mark_if_feature_version, skip_unless_feature
label_desc: Use image node_id 16 for calling the TestImage obj's underlying member method code with example usage: obj.test_dump(tmp_path) without return types