code: def test_sanity_dxt5():
      """Check DXT5 images can be opened"""
  
      with Image.open(TEST_FILE_DXT5) as im:
          im.load()
  
      assert im.format == "DDS"
      assert im.mode == "RGBA"
      assert im.size == (256, 256)
  
      assert_image_equal_tofile(
          im, TEST_FILE_DXT5.replace(".dds", ".png")
      )
  
imports: from io import BytesIO
  import pytest
  from PIL import DdsImagePlugin, Image
  from .helper import assert_image_equal, assert_image_equal_tofile, hopper
label_desc: Use image node_id 3 for calling a global function with example usage: test_sanity_dxt5() without return types