# Copyright (C) 2018  Lars Wirzenius
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.


import unittest

import muck


class AuthorizationCheckerTests(unittest.TestCase):

    def setUp(self):
        self.ac = muck.AuthorizationChecker(muck.test_key_text)

    def create_token(self, scopes):
        claims = {
            'scope': ' '.join(scopes),
        }
        return muck.create_token(claims, muck.test_key_text)

    def create_request(self, scopes):
        token = self.create_token(scopes)
        r = muck.Request(method='GET')
        r.add_headers({
            'Authorization': 'Bearer {}'.format(token),
        })
        return r

    def test_denies_if_token_parsing_fails(self):
        r = muck.Request(method='GET')
        self.assertFalse(self.ac.request_is_allowed(r, 'GET', []))

    def test_denies_if_token_lacks_required_scope(self):
        r = self.create_request([])
        self.assertFalse(self.ac.request_is_allowed(r, 'GET', ['foo']))

    def test_denies_if_method_is_wrong(self):
        r = self.create_request(['foo'])
        self.assertFalse(self.ac.request_is_allowed(r, 'DELETE', ['foo']))

    def test_allows_for_acceptable_request(self):
        r = self.create_request(['foo'])
        self.assertTrue(self.ac.request_is_allowed(r, 'GET', ['foo']))

    def test_returns_claims_from_token(self):
        r = self.create_request(['foo'])
        expected = {
            'scope': 'foo',
        }
        self.assertTrue(self.ac.get_claims_from_token(r), expected)