code: def test_dib_frombytes_tobytes_roundtrip(self):
      # Arrange
      # Make two different DIB images
      im = hopper()
      dib1 = ImageWin.Dib(im)
  
      mode = "RGB"
      size = (128, 128)
      dib2 = ImageWin.Dib(mode, size)
  
      # Confirm they're different
      assert dib1.tobytes() != dib2.tobytes()
  
      # Act
      # Make one the same as the using tobytes()/frombytes()
      test_buffer = dib1.tobytes()
      for datatype in ("bytes", "memoryview"):
          if datatype == "memoryview":
              test_buffer = memoryview(test_buffer)
          dib2.frombytes(test_buffer)
  
          # Assert
          # Confirm they're the same
          assert dib1.tobytes() == dib2.tobytes()
  
file_path: pillow/Tests/test_imagewin.py
imports: from __future__ import annotations
  import pytest
  from PIL import ImageWin
  from .helper import hopper, is_win32
label_desc: Use image node_id 5 for calling the TestImageWinDib obj's underlying member method code with example usage: obj.test_dib_frombytes_tobytes_roundtrip() without return types