'Basic formattable event passes the format along correctly.'

def test_basicFormat(self):

    event = dict(log_format='Hello,    {who}!', who='dude')
    (records, output) = self.logEvent(event)
    self.assertEqual(len(records), 1)
    self.assertEqual(str(records[0].msg), u'Hello,    dude!')
    self.assertEqual(records[0].args, ())
