code: def test_deconcatenate_column_preserve_position_string(dataframe):
      df_original = dataframe.concatenate_columns(
          column_names=["a", "decorated-elephant"],
          sep="-",
          new_column_name="index",
      )
      index_original = list(df_original.columns).index("index")
      new_column_names = ["col1", "col2"]
      df = df_original.deconcatenate_column(
          column_name="index",
          new_column_names=new_column_names,
          sep="-",
          preserve_position=True,
      )
      assert "index" not in df.columns, "column_name not dropped"
      assert "col1" in df.columns, "new column not present"
      assert "col2" in df.columns, "new column not present"
      assert len(df_original.columns) + 1 == len(
          df.columns
      ), "Number of columns inconsistent"
      assert (
          list(df.columns).index("col1") == index_original
      ), "Position not preserved"
      assert (
          list(df.columns).index("col2") == index_original + 1
      ), "Position not preserved"
      assert len(df.columns) == (
          len(df_original.columns) + len(new_column_names) - 1
      ), "Number of columns after deconcatenation is incorrect"
  
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 4 for calling a global function with example usage: test_deconcatenate_column_preserve_position_string(dataframe) without return types