* adding support for matrix slicing with query ID for cross-validation * hail mary test of unrar installation for windows tests * trying to modify tests to run in Github CI * Remove dependency on wget and unrar * Save error log from R test * Relax assertion in test_training * Use int instead of bool in C function interface * Revise R interface * Add XGDMatrixSliceDMatrixEx and keep old XGDMatrixSliceDMatrix for API compatibility
This folder contains testcases for xgboost.