* Deprecate LabelEncoder in XGBClassifier; skip LabelEncoder for cuDF/cuPy inputs * Add unit tests for cuDF and cuPy inputs with XGBClassifier * Fix lint * Clarify warning * Move use_label_encoder option to XGBClassifier constructor * Add a test for cudf.Series * Add use_label_encoder to XGBRFClassifier doc * Address reviewer feedback
This folder contains testcases for xgboost.