forked from s434596/CatOrNot
251 lines
9.2 KiB
Python
251 lines
9.2 KiB
Python
# -*- coding: utf-8 -*-
|
|
"""
|
|
flask.testing
|
|
~~~~~~~~~~~~~
|
|
|
|
Implements test support helpers. This module is lazily imported
|
|
and usually not used in production environments.
|
|
|
|
:copyright: © 2010 by the Pallets team.
|
|
:license: BSD, see LICENSE for more details.
|
|
"""
|
|
|
|
import werkzeug
|
|
from contextlib import contextmanager
|
|
|
|
from click.testing import CliRunner
|
|
from flask.cli import ScriptInfo
|
|
from werkzeug.test import Client, EnvironBuilder
|
|
from flask import _request_ctx_stack
|
|
from flask.json import dumps as json_dumps
|
|
from werkzeug.urls import url_parse
|
|
|
|
|
|
def make_test_environ_builder(
|
|
app, path='/', base_url=None, subdomain=None, url_scheme=None,
|
|
*args, **kwargs
|
|
):
|
|
"""Create a :class:`~werkzeug.test.EnvironBuilder`, taking some
|
|
defaults from the application.
|
|
|
|
:param app: The Flask application to configure the environment from.
|
|
:param path: URL path being requested.
|
|
:param base_url: Base URL where the app is being served, which
|
|
``path`` is relative to. If not given, built from
|
|
:data:`PREFERRED_URL_SCHEME`, ``subdomain``,
|
|
:data:`SERVER_NAME`, and :data:`APPLICATION_ROOT`.
|
|
:param subdomain: Subdomain name to append to :data:`SERVER_NAME`.
|
|
:param url_scheme: Scheme to use instead of
|
|
:data:`PREFERRED_URL_SCHEME`.
|
|
:param json: If given, this is serialized as JSON and passed as
|
|
``data``. Also defaults ``content_type`` to
|
|
``application/json``.
|
|
:param args: other positional arguments passed to
|
|
:class:`~werkzeug.test.EnvironBuilder`.
|
|
:param kwargs: other keyword arguments passed to
|
|
:class:`~werkzeug.test.EnvironBuilder`.
|
|
"""
|
|
|
|
assert (
|
|
not (base_url or subdomain or url_scheme)
|
|
or (base_url is not None) != bool(subdomain or url_scheme)
|
|
), 'Cannot pass "subdomain" or "url_scheme" with "base_url".'
|
|
|
|
if base_url is None:
|
|
http_host = app.config.get('SERVER_NAME') or 'localhost'
|
|
app_root = app.config['APPLICATION_ROOT']
|
|
|
|
if subdomain:
|
|
http_host = '{0}.{1}'.format(subdomain, http_host)
|
|
|
|
if url_scheme is None:
|
|
url_scheme = app.config['PREFERRED_URL_SCHEME']
|
|
|
|
url = url_parse(path)
|
|
base_url = '{scheme}://{netloc}/{path}'.format(
|
|
scheme=url.scheme or url_scheme,
|
|
netloc=url.netloc or http_host,
|
|
path=app_root.lstrip('/')
|
|
)
|
|
path = url.path
|
|
|
|
if url.query:
|
|
sep = b'?' if isinstance(url.query, bytes) else '?'
|
|
path += sep + url.query
|
|
|
|
if 'json' in kwargs:
|
|
assert 'data' not in kwargs, (
|
|
"Client cannot provide both 'json' and 'data'."
|
|
)
|
|
|
|
# push a context so flask.json can use app's json attributes
|
|
with app.app_context():
|
|
kwargs['data'] = json_dumps(kwargs.pop('json'))
|
|
|
|
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`.
|
|
|
|
.. versionchanged:: 0.12
|
|
`app.test_client()` includes preset default environment, which can be
|
|
set after instantiation of the `app.test_client()` object in
|
|
`client.environ_base`.
|
|
|
|
Basic usage is outlined in the :ref:`testing` chapter.
|
|
"""
|
|
|
|
preserve_context = False
|
|
|
|
def __init__(self, *args, **kwargs):
|
|
super(FlaskClient, self).__init__(*args, **kwargs)
|
|
self.environ_base = {
|
|
"REMOTE_ADDR": "127.0.0.1",
|
|
"HTTP_USER_AGENT": "werkzeug/" + werkzeug.__version__
|
|
}
|
|
|
|
@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:
|
|
session_interface = app.session_interface
|
|
sess = session_interface.open_session(app, 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 session_interface.is_null_session(sess):
|
|
session_interface.save_session(app, sess, resp)
|
|
headers = resp.get_wsgi_headers(c.request.environ)
|
|
self.cookie_jar.extract_wsgi(c.request.environ, headers)
|
|
|
|
def open(self, *args, **kwargs):
|
|
as_tuple = kwargs.pop('as_tuple', False)
|
|
buffered = kwargs.pop('buffered', False)
|
|
follow_redirects = kwargs.pop('follow_redirects', False)
|
|
|
|
if (
|
|
not kwargs and len(args) == 1
|
|
and isinstance(args[0], (EnvironBuilder, dict))
|
|
):
|
|
environ = self.environ_base.copy()
|
|
|
|
if isinstance(args[0], EnvironBuilder):
|
|
environ.update(args[0].get_environ())
|
|
else:
|
|
environ.update(args[0])
|
|
|
|
environ['flask._preserve_context'] = self.preserve_context
|
|
else:
|
|
kwargs.setdefault('environ_overrides', {}) \
|
|
['flask._preserve_context'] = self.preserve_context
|
|
kwargs.setdefault('environ_base', self.environ_base)
|
|
builder = make_test_environ_builder(
|
|
self.application, *args, **kwargs
|
|
)
|
|
|
|
try:
|
|
environ = builder.get_environ()
|
|
finally:
|
|
builder.close()
|
|
|
|
return Client.open(
|
|
self, environ,
|
|
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()
|
|
|
|
|
|
class FlaskCliRunner(CliRunner):
|
|
"""A :class:`~click.testing.CliRunner` for testing a Flask app's
|
|
CLI commands. Typically created using
|
|
:meth:`~flask.Flask.test_cli_runner`. See :ref:`testing-cli`.
|
|
"""
|
|
def __init__(self, app, **kwargs):
|
|
self.app = app
|
|
super(FlaskCliRunner, self).__init__(**kwargs)
|
|
|
|
def invoke(self, cli=None, args=None, **kwargs):
|
|
"""Invokes a CLI command in an isolated environment. See
|
|
:meth:`CliRunner.invoke <click.testing.CliRunner.invoke>` for
|
|
full method documentation. See :ref:`testing-cli` for examples.
|
|
|
|
If the ``obj`` argument is not given, passes an instance of
|
|
:class:`~flask.cli.ScriptInfo` that knows how to load the Flask
|
|
app being tested.
|
|
|
|
:param cli: Command object to invoke. Default is the app's
|
|
:attr:`~flask.app.Flask.cli` group.
|
|
:param args: List of strings to invoke the command with.
|
|
|
|
:return: a :class:`~click.testing.Result` object.
|
|
"""
|
|
if cli is None:
|
|
cli = self.app.cli
|
|
|
|
if 'obj' not in kwargs:
|
|
kwargs['obj'] = ScriptInfo(create_app=lambda: self.app)
|
|
|
|
return super(FlaskCliRunner, self).invoke(cli, args, **kwargs)
|