How to use the mozregression.utils.set_http_cache_session function in mozregression

def test_none_returns_requests(self):
        utils.set_http_cache_session(self.make_cache())
        utils.set_http_cache_session(None)
        self.assertEquals(utils.get_http_session(), requests)

def setUp(self):
        self.addCleanup(utils.set_http_cache_session, None)

def test_none_returns_requests(self):
        utils.set_http_cache_session(self.make_cache())
        utils.set_http_cache_session(None)
        self.assertEquals(utils.get_http_session(), requests)

def setUp(self):
        self.addCleanup(utils.set_http_cache_session, None)

default_good_date = "2009-01-01"
    options = parse_args()
    logger = commandline.setup_logging("mozregression", options, {"mach": sys.stdout})

    fetch_config = create_config(options.app, mozinfo.os, options.bits)

    if fetch_config.is_inbound():
        # this can be useful for both inbound and nightly, because we
        # can go to inbound from nightly.
        fetch_config.set_inbound_branch(options.inbound_branch)

    cacheSession = limitedfilecache.get_cache(
        options.http_cache_dir, one_gigabyte,
        logger=get_default_logger('Limited File Cache'))

    set_http_cache_session(cacheSession)

    if options.inbound:
        if not fetch_config.is_inbound():
            sys.exit('Unable to bissect inbound for `%s`' % fetch_config.app_name)
        if not options.last_good_revision or not options.first_bad_revision:
            sys.exit("If bisecting inbound, both --good-rev and --bad-rev"
                     " must be set")
        bisector = Bisector(fetch_config, options,
                            last_good_revision=options.last_good_revision,
                            first_bad_revision=options.first_bad_revision)
        return bisector.bisect_inbound
    else:
        # TODO: currently every fetch_config is nightly aware. Shoud we test
        # for this to be sure here ?
        fetch_config.set_nightly_repo(options.repo)
        if not options.bad_release and not options.bad_date:

help="inbound branch name on ftp.mozilla.org",
                      metavar="[tracemonkey|mozilla-1.9.2]", default=None)
    parser.add_option("--http-cache-dir", dest="http_cache_dir",
                      help="the directory for caching http requests")

    options, args = parser.parse_args(args)
    if not options.start_rev or not options.end_rev:
        sys.exit("start revision and end revision must be specified")

    fetch_config = create_config(options.app, options.os, options.bits)

    cacheSession = limitedfilecache.get_cache(
        options.http_cache_dir, one_gigabyte,
        logger=get_default_logger('Limited File Cache'))

    set_http_cache_session(cacheSession)

    return BuildsFinder(fetch_config)