Fixed karma response in the case of absolutely no karma.

plugins/Karma.py

@@ -131,9 +131,12 @@ class Karma(callbacks.PrivmsgCommandAndRegexp, plugins.ChannelDBHandler):
                               ORDER BY added-subtracted ASC
                               LIMIT 3""")
             lowest = ['%r (%s)' % (t[0], t[1]) for t in cursor.fetchall()]
-            s = 'Highest karma: %s.  Lowest karma: %s.' % \
-                (utils.commaAndify(highest), utils.commaAndify(lowest))
-            irc.reply(msg, s)
+            if not (highest and lowest):
+                irc.error(msg, 'I have no karma for this channel.')
+            else:
+                s = 'Highest karma: %s.  Lowest karma: %s.' % \
+                    (utils.commaAndify(highest), utils.commaAndify(lowest))
+                irc.reply(msg, s)
             
     def increaseKarma(self, irc, msg, match):
         r"^(\S+)\+\+$"

test/test_Karma.py

@@ -42,6 +42,7 @@ if sqlite is not None:
     class KarmaTestCase(ChannelPluginTestCase, PluginDocumentation):
         plugins = ('Karma',)
         def testKarma(self):
+            self.assertError('karma')
             self.assertRegexp('karma foobar', 'no karma')
             try:
                 conf.replyWhenNotCommand = True
@@ -67,6 +68,5 @@ if sqlite is not None:
                               '.*total.*1')
 
 
-
 # vim:set shiftwidth=4 tabstop=8 expandtab textwidth=78: