code: def test_rearrange_jupytext_metadata():
      metadata = {"nbrmd_formats": "ipynb,py"}
      rearrange_jupytext_metadata(metadata)
      compare(metadata, {"jupytext": {"formats": "ipynb,py"}})
  
      metadata = {"jupytext_formats": "ipynb,py"}
      rearrange_jupytext_metadata(metadata)
      compare(metadata, {"jupytext": {"formats": "ipynb,py"}})
  
      metadata = {"executable": "#!/bin/bash"}
      rearrange_jupytext_metadata(metadata)
      compare(metadata, {"jupytext": {"executable": "#!/bin/bash"}})
  
imports: import pytest
  from nbformat.v4.nbbase import new_notebook
  import jupytext
  from jupytext.compare import compare
  from jupytext.formats import JupytextFormatError, divine_format, get_format_implementation, guess_format, long_form_multiple_formats, read_format_from_metadata, rearrange_jupytext_metadata, short_form_multiple_formats, update_jupytext_formats_metadata, validate_one_format
label_desc: Use image node_id 19 for calling a global function with example usage: test_rearrange_jupytext_metadata() without return types