'Test that the --auth command line creates a list in the
Options instance and appends values to it.'

def test_createsList(self):

    options = DummyOptions()
    options.parseOptions(['--auth', 'memory'])
    self.assertEqual(len(options['credCheckers']), 1)
    options = DummyOptions()
    options.parseOptions(['--auth', 'memory', '--auth', 'memory'])
    self.assertEqual(len(options['credCheckers']), 2)
