import unittest
from waeup.cas.authenticators import (
    get_all_authenticators, get_authenticator, filter_auth_opts,
    Authenticator, DummyAuthenticator,
    )


class TestHelpers(unittest.TestCase):

    def test_get_all_authenticators(self):
        # we can get authenticators via entry points
        auths = get_all_authenticators()
        assert 'dummy' in auths
        assert auths['dummy'] is DummyAuthenticator

    def test_filter_auth_opts(self):
        # we can filter auth opts
        result = filter_auth_opts(
            dict(auth='foo', auth_bar='baz', auth_baz='blah')
            )
        assert result == (
            {'auth': 'foo'},
            {'auth_bar': 'baz', 'auth_baz': 'blah'}
            )

    def test_get_authenticator(self):
        # we can parse a paste.deploy config dict for auth
        result = get_authenticator({})
        assert result == {}
        result = get_authenticator({'auth': 'dummy'})
        assert isinstance(result['auth'], DummyAuthenticator)


class AuthenticatorTests(unittest.TestCase):

    def test_create(self):
        # we can create Authenticator instances
        auth = Authenticator()
        assert isinstance(auth, Authenticator)


class DummyAuthenticatorTests(unittest.TestCase):

    def test_create(self):
        # we can create DummyAuthenticator instances
        auth = DummyAuthenticator()
        assert isinstance(auth, DummyAuthenticator)

    def test_check_credentials(self):
        # we can succeed with 'bird'/'bebop'. Others will fail.
        auth = DummyAuthenticator()
        result1 = auth.check_credentials('bird', 'bebop')
        assert result1 == (True, '')
        result2 = auth.check_credentials('foo', 'bar')
        assert result2 == (False, 'Invalid username or password.')