def METHOD_NAME(self):
    # Run multiple conversions to compare results
    cases = [['legendre', 2], ['legendre', 0],
             ['tabular', 33], ['histogram', 32],
             [['tabular', 33], ['legendre', 1]],
             [['tabular', 33], ['tabular', 3]],
             [['tabular', 33], ['histogram', 32]],
             [['histogram', 32], ['legendre', 1]],
             [['histogram', 32], ['tabular', 3]],
             [['histogram', 32], ['histogram', 16]],
             ['angle', 2], [['angle', 2], ['isotropic', None]]]
    outstr = ''
    for case in cases:
        build_mgxs_library(case)
        if config['mpi']:
            mpi_args = [config['mpiexec'], '-n', config['mpi_np']]
            openmc.run(openmc_exec=config['exe'], mpi_args=mpi_args)
        else:
            openmc.run(openmc_exec=config['exe'])
        with openmc.StatePoint('statepoint.{}.h5'.format(batches)) as sp:
            # Write out k-combined.
            outstr += 'k-combined:\n'
            form = '{:12.6E} {:12.6E}\n'
            outstr += form.format(sp.keff.n, sp.keff.s)
    return outstr