code: def test_worksheet(self):
      cells = [new_code_cell(), new_text_cell("html")]
      ws = new_worksheet(cells=cells)
      self.assertEqual(ws.cells, cells)
  
imports: from __future__ import annotations
  from unittest import TestCase
  import pytest
  from nbformat.v3.nbbase import NotebookNode, nbformat, new_author, new_code_cell, new_heading_cell, new_metadata, new_notebook, new_output, new_text_cell, new_worksheet
label_desc: Use image node_id 2 for calling the TestWorksheet obj's underlying member method code with example usage: obj.test_worksheet() without return types