Update test API.
Update test API.

ajjl/mlpack,theranger/mlpack,darcyliu/mlpack,lezorich/mlpack,palashahuja/mlpack,stereomatchingkiss/mlpack,lezorich/mlpack,ajjl/mlpack,stereomatchingkiss/mlpack,ranjan1990/mlpack,theranger/mlpack,palashahuja/mlpack,palashahuja/mlpack,theranger/mlpack,stereomatchingkiss/mlpack,darcyliu/mlpack,ranjan1990/mlpack,lezorich/mlpack,darcyliu/mlpack,ajjl/mlpack,ranjan1990/mlpack