code: def test_deconcatenate_column_autoname(dataframe):
      df_original = dataframe.concatenate_columns(
          column_names=["a", "decorated-elephant"],
          sep="-",
          new_column_name="index",
      ).remove_columns(["a", "decorated-elephant"])
  
      df = df_original.deconcatenate_column(
          "index",
          sep="-",
          new_column_names=["a", "decorated-elephant"],
          autoname="col",
      )
  
      assert "col1" in df.columns
      assert "col2" in df.columns
      assert "a" not in df.columns
      assert "decorated-elephant" not in df.columns
  
file_path: pyjanitor/tests/functions/test_deconcatenate_column.py
imports: import pandas
  import pytest
  from pandas.testing import assert_frame_equal
  import janitor
label_desc: Use image node_id 5 for calling a global function with example usage: test_deconcatenate_column_autoname(dataframe) without return types