code: def test_read_simple_file(
      script="""// ---
  // title: Simple file
  // ---
  
  // Here we have some text
  // And below we have some code
  
  println("Hello World")
  """,
  ):
      nb = jupytext.reads(script, "groovy")
      assert len(nb.cells) == 3
      assert nb.cells[0].cell_type == "raw"
      assert nb.cells[0].source == "---\ntitle: Simple file\n---"
      assert nb.cells[1].cell_type == "markdown"
      assert (
          nb.cells[1].source == "Here we have some text\n"
          "And below we have some code"
      )
      assert nb.cells[2].cell_type == "code"
      assert nb.cells[2].source == """println("Hello World")"""
  
      script2 = jupytext.writes(nb, "groovy")
      compare(script2, script)
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_read_simple_file(script) without return types