'If L{irc.IRCClient.heartbeatInterval} is set to L{None} then no
heartbeat is created.'

def test_heartbeatDisabled(self):

    self.assertIdentical(self.client._heartbeat, None)
    self.client.heartbeatInterval = None
    self.client.irc_RPL_WELCOME('foo', [])
    self.assertIdentical(self.client._heartbeat, None)
