code: def test_output_sheetnames_sequence():
      """Test output if sheetnames is a list."""
      result = (
          io.xlsx_cells(
              filename, sheetnames=["pivot-notes"], font=True
          )["font"]
          .str.get("name")
          .tolist()
      )
      assert "Calibri" in result
  
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 17 for calling a global function with example usage: test_output_sheetnames_sequence() without return types