'The L{OpenSSHFactory} built by L{tap.makeService} has a portal with
L{ISSHPrivateKey} and L{IUsernamePassword} interfaces registered as
checkers.'

def test_checkers(self):

    config = tap.Options()
    service = tap.makeService(config)
    portal = service.factory.portal
    self.assertEqual(set(portal.checkers.keys()), set([ISSHPrivateKey, IUsernamePassword]))
