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#    Licensed under the Apache License, Version 2.0 (the "License"); you may
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#
#         http://www.apache.org/licenses/LICENSE-2.0
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"""Tests cors middleware."""

import http.client

import httplib2
from oslo_utils.fixture import uuidsentinel as uuids

from glance.tests import functional


class TestCORSMiddleware(functional.FunctionalTest):
    '''Provide a basic smoke test to ensure CORS middleware is active.

    The tests below provide minimal confirmation that the CORS middleware
    is active, and may be configured. For comprehensive tests, please consult
    the test suite in oslo_middleware.
    '''

    def setUp(self):
        super(TestCORSMiddleware, self).setUp()
        # Cleanup is handled in teardown of the parent class.
        self.api_server.deployment_flavor = "caching"
        self.api_server.send_identity_credentials = True
        self.start_servers(**self.__dict__.copy())
        self.http = httplib2.Http()
        self.api_path = "http://%s:%d/v2/images" % ("127.0.0.1", self.api_port)

    def _headers(self, extra=None):
        headers = {
            'X-Identity-Status': 'Confirmed',
            'X-Auth-Token': '932c5c84-02ac-4fe5-a9ba-620af0e2bb96',
            'X-User-Id': 'f9a41d13-0c13-47e9-bee2-ce4e8bfe958e',
            'X-Tenant-Id': uuids.tenant,
            'X-Roles': 'reader,member',
        }
        if extra:
            headers.update(extra)
        return headers

    def test_valid_cors_options_request(self):
        (r_headers, content) = self.http.request(
            self.api_path,
            'OPTIONS',
            headers=self._headers({
                'Origin': 'http://valid.example.com',
                'Access-Control-Request-Method': 'GET'
            }))

        self.assertEqual(http.client.OK, r_headers.status)
        self.assertIn('access-control-allow-origin', r_headers)
        self.assertEqual('http://valid.example.com',
                         r_headers['access-control-allow-origin'])

    def test_invalid_cors_options_request(self):
        (r_headers, content) = self.http.request(
            self.api_path,
            'OPTIONS',
            headers=self._headers({
                'Origin': 'http://invalid.example.com',
                'Access-Control-Request-Method': 'GET'
            }))

        self.assertEqual(http.client.OK, r_headers.status)
        self.assertNotIn('access-control-allow-origin', r_headers)

    def test_valid_cors_get_request(self):
        (r_headers, content) = self.http.request(
            self.api_path,
            'GET',
            headers=self._headers({
                'Origin': 'http://valid.example.com'
            }))

        self.assertEqual(http.client.OK, r_headers.status)
        self.assertIn('access-control-allow-origin', r_headers)
        self.assertEqual('http://valid.example.com',
                         r_headers['access-control-allow-origin'])

    def test_invalid_cors_get_request(self):
        (r_headers, content) = self.http.request(
            self.api_path,
            'GET',
            headers=self._headers({
                'Origin': 'http://invalid.example.com'
            }))

        self.assertEqual(http.client.OK, r_headers.status)
        self.assertNotIn('access-control-allow-origin', r_headers)
