code: def test_tbed003_readonly_copy_paste(test, props):
      test.start_server(get_app(props))
  
      target = test.table("table")
      initial_text = target.cell(1, "aaa-readonly").get_text()
  
      cell_source = target.cell(0, "aaa")
      cell_target = target.cell(1, "aaa-readonly")
  
      cell_source.click()
      test.copy()
  
      cell_target.click()
      test.paste()
  
      assert cell_target.get_text() == initial_text
      assert test.get_log_errors() == []
  
imports: import dash
  from utils import get_props, generate_mock_data
  from dash.dash_table import DataTable
  import pytest
label_desc: Use image node_id 4 for calling a global function with example usage: test_tbed003_readonly_copy_paste(test, props) without return types