mirror of https://github.com/pallets/flask.git
141 lines
5.4 KiB
Python
141 lines
5.4 KiB
Python
# -*- coding: utf-8 -*-
|
|
"""
|
|
flask.testing
|
|
~~~~~~~~~~~~~
|
|
|
|
Implements test support helpers. This module is lazily imported
|
|
and usually not used in production environments.
|
|
|
|
:copyright: (c) 2015 by Armin Ronacher.
|
|
:license: BSD, see LICENSE for more details.
|
|
"""
|
|
|
|
from contextlib import contextmanager
|
|
from werkzeug.test import Client, EnvironBuilder
|
|
from flask import _request_ctx_stack
|
|
from flask.json import dumps as json_dumps
|
|
|
|
try:
|
|
from werkzeug.urls import url_parse
|
|
except ImportError:
|
|
from urlparse import urlsplit as url_parse
|
|
|
|
|
|
def make_test_environ_builder(app, path='/', base_url=None, *args, **kwargs):
|
|
"""Creates a new test builder with some application defaults thrown in."""
|
|
http_host = app.config.get('SERVER_NAME')
|
|
app_root = app.config.get('APPLICATION_ROOT')
|
|
if base_url is None:
|
|
url = url_parse(path)
|
|
base_url = 'http://%s/' % (url.netloc or http_host or 'localhost')
|
|
if app_root:
|
|
base_url += app_root.lstrip('/')
|
|
if url.netloc:
|
|
path = url.path
|
|
if url.query:
|
|
path += '?' + url.query
|
|
|
|
if 'json' in kwargs:
|
|
if 'data' in kwargs:
|
|
raise ValueError('Client cannot provide both `json` and `data`')
|
|
kwargs['data'] = json_dumps(kwargs['json'])
|
|
|
|
# Only set Content-Type when not explicitly provided
|
|
if 'content_type' not in kwargs:
|
|
kwargs['content_type'] = 'application/json'
|
|
|
|
return EnvironBuilder(path, base_url, *args, **kwargs)
|
|
|
|
|
|
class FlaskClient(Client):
|
|
"""Works like a regular Werkzeug test client but has some knowledge about
|
|
how Flask works to defer the cleanup of the request context stack to the
|
|
end of a ``with`` body when used in a ``with`` statement. For general
|
|
information about how to use this class refer to
|
|
:class:`werkzeug.test.Client`.
|
|
|
|
Basic usage is outlined in the :ref:`testing` chapter.
|
|
"""
|
|
|
|
preserve_context = False
|
|
|
|
@contextmanager
|
|
def session_transaction(self, *args, **kwargs):
|
|
"""When used in combination with a ``with`` statement this opens a
|
|
session transaction. This can be used to modify the session that
|
|
the test client uses. Once the ``with`` block is left the session is
|
|
stored back.
|
|
|
|
::
|
|
|
|
with client.session_transaction() as session:
|
|
session['value'] = 42
|
|
|
|
Internally this is implemented by going through a temporary test
|
|
request context and since session handling could depend on
|
|
request variables this function accepts the same arguments as
|
|
:meth:`~flask.Flask.test_request_context` which are directly
|
|
passed through.
|
|
"""
|
|
if self.cookie_jar is None:
|
|
raise RuntimeError('Session transactions only make sense '
|
|
'with cookies enabled.')
|
|
app = self.application
|
|
environ_overrides = kwargs.setdefault('environ_overrides', {})
|
|
self.cookie_jar.inject_wsgi(environ_overrides)
|
|
outer_reqctx = _request_ctx_stack.top
|
|
with app.test_request_context(*args, **kwargs) as c:
|
|
sess = app.open_session(c.request)
|
|
if sess is None:
|
|
raise RuntimeError('Session backend did not open a session. '
|
|
'Check the configuration')
|
|
|
|
# Since we have to open a new request context for the session
|
|
# handling we want to make sure that we hide out own context
|
|
# from the caller. By pushing the original request context
|
|
# (or None) on top of this and popping it we get exactly that
|
|
# behavior. It's important to not use the push and pop
|
|
# methods of the actual request context object since that would
|
|
# mean that cleanup handlers are called
|
|
_request_ctx_stack.push(outer_reqctx)
|
|
try:
|
|
yield sess
|
|
finally:
|
|
_request_ctx_stack.pop()
|
|
|
|
resp = app.response_class()
|
|
if not app.session_interface.is_null_session(sess):
|
|
app.save_session(sess, resp)
|
|
headers = resp.get_wsgi_headers(c.request.environ)
|
|
self.cookie_jar.extract_wsgi(c.request.environ, headers)
|
|
|
|
def open(self, *args, **kwargs):
|
|
kwargs.setdefault('environ_overrides', {}) \
|
|
['flask._preserve_context'] = self.preserve_context
|
|
|
|
as_tuple = kwargs.pop('as_tuple', False)
|
|
buffered = kwargs.pop('buffered', False)
|
|
follow_redirects = kwargs.pop('follow_redirects', False)
|
|
builder = make_test_environ_builder(self.application, *args, **kwargs)
|
|
|
|
return Client.open(self, builder,
|
|
as_tuple=as_tuple,
|
|
buffered=buffered,
|
|
follow_redirects=follow_redirects)
|
|
|
|
def __enter__(self):
|
|
if self.preserve_context:
|
|
raise RuntimeError('Cannot nest client invocations')
|
|
self.preserve_context = True
|
|
return self
|
|
|
|
def __exit__(self, exc_type, exc_value, tb):
|
|
self.preserve_context = False
|
|
|
|
# on exit we want to clean up earlier. Normally the request context
|
|
# stays preserved until the next request in the same thread comes
|
|
# in. See RequestGlobals.push() for the general behavior.
|
|
top = _request_ctx_stack.top
|
|
if top is not None and top.preserved:
|
|
top.pop()
|