code: def test_default_values():
      """
      Test output for default values.
      """
      assert "Matilda" in io.xlsx_cells(wb, "clean")["value"].tolist()
  
imports: from pathlib import Path
  import pytest
  from openpyxl import load_workbook
  from pandas.testing import assert_series_equal
  from janitor import io
label_desc: Use image node_id 11 for calling a global function with example usage: test_default_values() without return types