add test

import os

import re

import shutil

import sys

def change_line(filename, old, new):

        filename = "sustech-setup.tex"

        backup(filename, TOBACKUP)

        if not args.undo:

            comment_line(filename, "{gbt7714}", True)

            comment_line(filename, "citestyle{super}", True)

            comment_line(filename, "citestyle{numbers}", True)

            comment_line(filename, "{natbib}", True)

            comment_line(filename, "bibliographystyle{sustechthesis-numeric}", True)

            comment_line(filename, "{biblatex}", False)

            comment_line(filename, "gb7714-2015,.*{biblatex}", False)

            comment_line(filename, "addbibresource{ref/refs.bib}", False)

    elif args.recipe == 4:

        # progress