[ENH] Add second FeatureSelection test parameter set - #10232

method="none" doesn't pass the suite. running check_estimator(FeatureSelection) with these params gives 4 failures, all on param set 1:

test_fit_transform_output: FeatureSelection.transform should return an object of
scitype Series when given an input of scitype Series, but found the following
return: None

test_fit_idempotent / test_persistence_via_pickle / test_save_estimators_to_file:
unsupported operand type(s) for -: 'NoneType' and 'NoneType'

"none" returns None from transform by design, so the boilerplate can't take it as a Series.

{"method": "feature-importances", "n_columns": 2} passes all 80 checks and exercises the regressor path instead of the passthrough.

also worth a rebase, the _config.py hunk is against a stale main (DontUpdate is no longer in that list).

Thanks for catching this. I reproduced the four failures with method="none" and confirmed that the None output is incompatible with the estimator checks.

I rebased onto the current main, replaced the second parameter set with {"method": "feature-importances", "n_columns": 2}, and kept the config change limited to removing FeatureSelection from the coverage exclusion.

Validation after the update:

• check_estimator(FeatureSelection): 80/80 passed
• test_get_test_params_coverage: passed
• Ruff on both changed files: passed

The updated branch is pushed.