How to use the pmxbot.karma.Karma function in pmxbot

def mongodb_karma(self, request, mongodb_uri):
        k = karma.Karma.from_URI(mongodb_uri)
        k.db = k.db.database.connection[k.db.database.name + '_test'][k.db.name]
        request.addfinalizer(k.db.drop)
        return k

def test_motivate_with_reason(self):
        """
        Test that motivate ignores the reason
        """
        subject = "foo"
        pre = karma.Karma.store.lookup(subject)
        res = commands.motivate(
            channel="#test", rest=" %s\tfor some really incredible reason" % subject
        )
        assert res == "you're doing good work, %s!" % subject
        post = karma.Karma.store.lookup(subject)
        assert post == pre + 1

(
            "Between the coffee break, the smoking break, the lunch break, "
            "the tea break, the bagel break, and the water cooler break, "
            "may I suggest a work break.  It’s when you do some work"
        ),
        "Work faster",
        "I didn’t realize we paid people for doing that",
        "You aren't being paid to believe in the power of your dreams",
    ]
    suggestion = random.choice(suggestions)
    rest = rest.strip()
    if rest:
        karma.Karma.store.change(rest, -1)
        suggestion = suggestion + ', %s' % rest
    else:
        karma.Karma.store.change(channel, -1)
    karma.Karma.store.change(nick, -1)
    return suggestion