'Tests that disallowed fields are not getting updated.'

def testUpdateConfigBlacklist(self):

    with test_lib.ConfigOverrider({'Client.server_urls': ['http://something.com/'], 'Client.server_serial_number': 1}):
        location = ['http://www.example.com']
        request = rdf_protodict.Dict()
        request['Client.server_urls'] = location
        request['Client.server_serial_number'] = 10
        self.RunAction(admin.UpdateConfiguration, request)
        self.assertEqual(config.CONFIG['Client.server_urls'], location)
        self.assertEqual(config.CONFIG['Client.server_serial_number'], 1)
