#include <mpi.h>

#include <stdio.h>

#include "mpitest.h"

int main(int argc, char **argv)

{

    MPI_Group basegroup;

    MPI_Comm comm;

    int worldrank, rank;

    int errs = 0, errclass, mpi_errno;

    MTest_Init(&argc, &argv);

    MPI_Comm_rank(MPI_COMM_WORLD, &worldrank);

    comm = MPI_COMM_WORLD;

    MPI_Comm_group(comm, &basegroup);

    MPI_Comm_rank(comm, &rank;;

    MPI_Errhandler_set(MPI_COMM_WORLD, MPI_ERRORS_RETURN);

    /* Checking group_rank for NULL variable */

    mpi_errno = MPI_Group_rank(basegroup, NULL);

    MPI_Error_class(mpi_errno, &errclass);

    if (errclass != MPI_ERR_ARG)

        ++errs;

    MPI_Comm_free(&comm);

    MPI_Group_free(&basegroup);

    MTest_Finalize(errs);

    return 0;

}