#include <mpi.h>

#include <stdio.h>

#include "mpitest.h"

int main(int argc, char *argv[])

{

    int errs = 0, errclass, mpi_errno;

    int rank, size;

    MPI_Comm dup_comm;

    MPI_Group group;

    MTest_Init(&argc, &argv);

    MPI_Comm_rank(MPI_COMM_WORLD, &rank;;

    MPI_Comm_size(MPI_COMM_WORLD, &size);

    MPI_Comm_set_errhandler(MPI_COMM_WORLD, MPI_ERRORS_RETURN);

    MPI_Comm_dup(MPI_COMM_WORLD, &dup_comm);

    MPI_Comm_group(dup_comm, &group);

    MPI_Errhandler_set(MPI_COMM_WORLD, MPI_ERRORS_RETURN);

    /*test comm_group for NULL variable */

    mpi_errno = MPI_Comm_group(dup_comm, NULL);

    MPI_Error_class(mpi_errno, &errclass);

    if (errclass != MPI_ERR_ARG)

        ++errs;

    MPI_Comm_free(&dup_comm);

    MPI_Group_free(&group);

    MTest_Finalize(errs);

    return 0;

}