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# Copyright 2013 OpenStack Foundation
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
from oslo_serialization import jsonutils
import six
import webtest
from keystone.auth import controllers as auth_controllers
from keystone.tests import unit as tests
from keystone.tests.unit import default_fixtures
from keystone.tests.unit.ksfixtures import database
class RestfulTestCase(tests.TestCase):
"""Performs restful tests against the WSGI app over HTTP.
This class launches public & admin WSGI servers for every test, which can
be accessed by calling ``public_request()`` or ``admin_request()``,
respectfully.
``restful_request()`` and ``request()`` methods are also exposed if you
need to bypass restful conventions or access HTTP details in your test
implementation.
Three new asserts are provided:
* ``assertResponseSuccessful``: called automatically for every request
unless an ``expected_status`` is provided
* ``assertResponseStatus``: called instead of ``assertResponseSuccessful``,
if an ``expected_status`` is provided
* ``assertValidResponseHeaders``: validates that the response headers
appear as expected
Requests are automatically serialized according to the defined
``content_type``. Responses are automatically deserialized as well, and
available in the ``response.body`` attribute. The original body content is
available in the ``response.raw`` attribute.
"""
# default content type to test
content_type = 'json'
def get_extensions(self):
return None
def setUp(self, app_conf='keystone'):
super(RestfulTestCase, self).setUp()
# Will need to reset the plug-ins
self.addCleanup(setattr, auth_controllers, 'AUTH_METHODS', {})
self.useFixture(database.Database(extensions=self.get_extensions()))
self.load_backends()
self.load_fixtures(default_fixtures)
self.public_app = webtest.TestApp(
self.loadapp(app_conf, name='main'))
self.addCleanup(delattr, self, 'public_app')
self.admin_app = webtest.TestApp(
self.loadapp(app_conf, name='admin'))
self.addCleanup(delattr, self, 'admin_app')
def request(self, app, path, body=None, headers=None, token=None,
expected_status=None, **kwargs):
if headers:
headers = {str(k): str(v) for k, v in six.iteritems(headers)}
else:
headers = {}
if token:
headers['X-Auth-Token'] = str(token)
# sets environ['REMOTE_ADDR']
kwargs.setdefault('remote_addr', 'localhost')
response = app.request(path, headers=headers,
status=expected_status, body=body,
**kwargs)
return response
def assertResponseSuccessful(self, response):
"""Asserts that a status code lies inside the 2xx range.
:param response: :py:class:`httplib.HTTPResponse` to be
verified to have a status code between 200 and 299.
example::
self.assertResponseSuccessful(response)
"""
self.assertTrue(
response.status_code >= 200 and response.status_code <= 299,
'Status code %d is outside of the expected range (2xx)\n\n%s' %
(response.status, response.body))
def assertResponseStatus(self, response, expected_status):
"""Asserts a specific status code on the response.
:param response: :py:class:`httplib.HTTPResponse`
:param expected_status: The specific ``status`` result expected
example::
self.assertResponseStatus(response, 204)
"""
self.assertEqual(
response.status_code,
expected_status,
'Status code %s is not %s, as expected)\n\n%s' %
(response.status_code, expected_status, response.body))
def assertValidResponseHeaders(self, response):
"""Ensures that response headers appear as expected."""
self.assertIn('X-Auth-Token', response.headers.get('Vary'))
def assertValidErrorResponse(self, response, expected_status=400):
"""Verify that the error response is valid.
Subclasses can override this function based on the expected response.
"""
self.assertEqual(response.status_code, expected_status)
error = response.result['error']
self.assertEqual(error['code'], response.status_code)
self.assertIsNotNone(error.get('title'))
def _to_content_type(self, body, headers, content_type=None):
"""Attempt to encode JSON and XML automatically."""
content_type = content_type or self.content_type
if content_type == 'json':
headers['Accept'] = 'application/json'
if body:
headers['Content-Type'] = 'application/json'
return jsonutils.dumps(body)
def _from_content_type(self, response, content_type=None):
"""Attempt to decode JSON and XML automatically, if detected."""
content_type = content_type or self.content_type
if response.body is not None and response.body.strip():
# if a body is provided, a Content-Type is also expected
header = response.headers.get('Content-Type')
self.assertIn(content_type, header)
if content_type == 'json':
response.result = jsonutils.loads(response.body)
else:
response.result = response.body
def restful_request(self, method='GET', headers=None, body=None,
content_type=None, response_content_type=None,
**kwargs):
"""Serializes/deserializes json as request/response body.
.. WARNING::
* Existing Accept header will be overwritten.
* Existing Content-Type header will be overwritten.
"""
# Initialize headers dictionary
headers = {} if not headers else headers
body = self._to_content_type(body, headers, content_type)
# Perform the HTTP request/response
response = self.request(method=method, headers=headers, body=body,
**kwargs)
response_content_type = response_content_type or content_type
self._from_content_type(response, content_type=response_content_type)
# we can save some code & improve coverage by always doing this
if method != 'HEAD' and response.status_code >= 400:
self.assertValidErrorResponse(response)
# Contains the decoded response.body
return response
def _request(self, convert=True, **kwargs):
if convert:
response = self.restful_request(**kwargs)
else:
response = self.request(**kwargs)
self.assertValidResponseHeaders(response)
return response
def public_request(self, **kwargs):
return self._request(app=self.public_app, **kwargs)
def admin_request(self, **kwargs):
return self._request(app=self.admin_app, **kwargs)
def _get_token(self, body):
"""Convenience method so that we can test authenticated requests."""
r = self.public_request(method='POST', path='/v2.0/tokens', body=body)
return self._get_token_id(r)
def get_unscoped_token(self):
"""Convenience method so that we can test authenticated requests."""
return self._get_token({
'auth': {
'passwordCredentials': {
'username': self.user_foo['name'],
'password': self.user_foo['password'],
},
},
})
def get_scoped_token(self, tenant_id=None):
"""Convenience method so that we can test authenticated requests."""
if not tenant_id:
tenant_id = self.tenant_bar['id']
return self._get_token({
'auth': {
'passwordCredentials': {
'username': self.user_foo['name'],
'password': self.user_foo['password'],
},
'tenantId': tenant_id,
},
})
def _get_token_id(self, r):
"""Helper method to return a token ID from a response.
This needs to be overridden by child classes for on their content type.
"""
raise NotImplementedError()
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