code: def test_columnselect_int():
      """Test that integer/iloc subsetting in ColumnSelect works as intended."""
      X = load_longley()[1]
      columns = [0, 2, 4, 10]
      transformer = ColumnSelect(columns=columns)
      X_subset = transformer.fit_transform(X=X)
  
      assert X_subset.columns.equals(X.columns[[0, 2, 4]])
  
file_path: sktime/sktime/transformations/series/tests/test_subset.py
imports: import pandas
  import pytest
  from sktime.datasets import load_airline, load_longley
  from sktime.forecasting.naive import NaiveForecaster
  from sktime.transformations.series.subset import ColumnSelect, IndexSubset
label_desc: Use image node_id 3 for calling a global function with example usage: test_columnselect_int() without return types