/usr/share/pyshared/pesto/testing.py is in python-pesto 25-1.
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# See LICENSE.txt for terms of redistribution and use.
"""
pesto.testing
-------------
Test utilities for WSGI applications.
"""
from itertools import chain
try:
from wsgiref.validate import validator as wsgi_validator
except ImportError:
# Redefine wsgi_validator as a no-op for Python < 2.5
wsgi_validator = lambda app: app
from StringIO import StringIO
from shutil import copyfileobj
from urlparse import urlparse
from pesto.response import Response
from pesto.request import Request
from pesto.wsgiutils import make_query
CRLF = '\r\n'
class MockResponse(Response):
"""
Response class with some extra methods to facilitate testing output of
applications
"""
def __init__(self, content=None, status="200 OK", headers=None, onclose=None, add_default_content_type=True, **kwargs):
super(MockResponse, self).__init__(
content,
status,
headers,
onclose,
add_default_content_type,
**kwargs
)
# Buffer the content iterator to make sure that it is not exhausted
# when inspecting it through the various debug methods
self._content = list(content)
if getattr(content, 'close', None):
content.close()
def __str__(self):
"""
Return a string representation of the entire response
"""
return ''.join(
chain(
['%s\r\n' % (self.status,)],
('%s: %s\r\n' % (k, v) for k, v in self.headers),
['\r\n'],
self.content
)
)
def text(self):
"""
Return a string representation of the entire response, using newlines
to separate headers, rather than the CRLF required by the HTTP spec.
"""
return ''.join(
chain(
['%s\n' % (self.status,)],
('%s: %s\n' % (k, v) for k, v in self.headers),
['\n'],
self.content
)
)
@property
def body(self):
"""
Content part as a single string
"""
return ''.join(self.content)
class TestApp(object):
response_class = MockResponse
environ_defaults = {
'SCRIPT_NAME': "",
'PATH_INFO': "",
'QUERY_STRING': "",
'SERVER_NAME': "localhost",
'SERVER_PORT': "80",
'SERVER_PROTOCOL': "HTTP/1.0",
'REMOTE_ADDR': '127.0.0.1',
'wsgi.version': (1, 0),
'wsgi.url_scheme': 'http',
'wsgi.multithread': False,
'wsgi.multiprocess': False,
'wsgi.run_once': False,
}
def __init__(self, app, charset='utf-8', **environ_defaults):
self.app = app
self.charset = charset
self.environ_defaults = self.environ_defaults.copy()
self.environ_defaults.update(**environ_defaults)
@classmethod
def make_environ(cls, REQUEST_METHOD='GET', PATH_INFO='', wsgi_input='', **kwargs):
"""
Generate a WSGI environ suitable for testing applications
Example usage::
>>> from pprint import pprint
>>> pprint(make_environ(PATH_INFO='/xyz')) # doctest: +ELLIPSIS
{'PATH_INFO': '/xyz',
'QUERY_STRING': '',
'REMOTE_ADDR': '127.0.0.1',
'REQUEST_METHOD': 'GET',
'SCRIPT_NAME': '',
'SERVER_NAME': 'localhost',
'SERVER_PORT': '80',
'SERVER_PROTOCOL': 'HTTP/1.0',
'wsgi.errors': <StringIO.StringIO instance at 0x...>,
'wsgi.input': <StringIO.StringIO instance at 0x...>,
'wsgi.multiprocess': False,
'wsgi.multithread': False,
'wsgi.run_once': False,
'wsgi.url_scheme': 'http',
'wsgi.version': (1, 0)}
"""
SCRIPT_NAME = kwargs.pop('SCRIPT_NAME', cls.environ_defaults["SCRIPT_NAME"])
if SCRIPT_NAME and SCRIPT_NAME[-1] == "/":
SCRIPT_NAME = SCRIPT_NAME[:-1]
PATH_INFO = "/" + PATH_INFO
environ = cls.environ_defaults.copy()
environ.update(kwargs)
for key, value in kwargs.items():
environ[key.replace('wsgi_', 'wsgi.')] = value
if isinstance(wsgi_input, basestring):
wsgi_input = StringIO(wsgi_input)
environ.update({
'REQUEST_METHOD': REQUEST_METHOD,
'SCRIPT_NAME': SCRIPT_NAME,
'PATH_INFO': PATH_INFO,
'wsgi.input': wsgi_input,
'wsgi.errors': StringIO(),
})
if environ['SCRIPT_NAME'] == '/':
environ['SCRIPT_NAME'] = ''
environ['PATH_INFO'] = '/' + environ['PATH_INFO']
while PATH_INFO.startswith('//'):
PATH_INFO = PATH_INFO[1:]
return environ
def _request(self, REQUEST_METHOD, PATH_INFO="", **kwargs):
"""
Generate a WSGI request of HTTP method ``REQUEST_METHOD`` and pass it
to the application being tested.
"""
environ = self.make_environ(REQUEST_METHOD, PATH_INFO, **kwargs)
if '?' in environ['PATH_INFO']:
environ['PATH_INFO'], querystring = environ['PATH_INFO'].split('?', 1)
if environ.get('QUERY_STRING'):
environ['QUERY_STRING'] += querystring
else:
environ['QUERY_STRING'] = querystring
app = wsgi_validator(self.app)
return self.response_class.from_wsgi(app, environ, self.start_response)
def get(self, PATH_INFO='/', data=None, charset='UTF-8', **kwargs):
"""
Make a GET request to the application and return the response.
"""
if data is not None:
kwargs.setdefault('QUERY_STRING', make_query(data, charset=charset))
return self._request(
'GET',
PATH_INFO=PATH_INFO,
**kwargs
)
def head(self, PATH_INFO='/', data=None, charset='UTF-8', **kwargs):
"""
Make a GET request to the application and return the response.
"""
if data is not None:
kwargs.setdefault('QUERY_STRING', make_query(data, charset=charset))
return self._request(
'HEAD',
PATH_INFO=PATH_INFO,
**kwargs
)
def start_response(self, status, headers, exc_info=None):
"""
WSGI start_response method
"""
def post(self, PATH_INFO='/', data=None, charset='UTF-8', **kwargs):
"""
Make a POST request to the application and return the response.
"""
if data is None:
data = {}
data = make_query(data, charset=charset)
wsgi_input = StringIO(data)
wsgi_input.seek(0)
return self._request(
'POST',
PATH_INFO=PATH_INFO,
CONTENT_TYPE="application/x-www-form-urlencoded",
CONTENT_LENGTH=str(len(data)),
wsgi_input=wsgi_input,
)
def post_multipart(self, PATH_INFO='/', data=None, files=None, charset='UTF-8', **kwargs):
"""
Create a MockWSGI configured to post multipart/form-data to the given URI.
This is usually used for mocking file uploads
:param data: dictionary of post data
:param files:
list of ``(name, filename, content_type, data)`` tuples. ``data``
may be either a byte string, iterator or file-like object.
"""
boundary = '----------------------------------------BoUnDaRyVaLuE'
if data is None:
data = {}
if files is None:
files = []
items = chain(
(
(
[
('Content-Disposition',
'form-data; name="%s"' % (name,))
],
data.encode(charset)
) for name, data in data.items()
), (
(
[
('Content-Disposition',
'form-data; name="%s"; filename="%s"' % (name, fname)),
('Content-Type', content_type)
], data
) for name, fname, content_type, data in files
)
)
post_data = StringIO()
post_data.write('--' + boundary)
for headers, data in items:
post_data.write(CRLF)
for name, value in headers:
post_data.write('%s: %s%s' % (name, value, CRLF))
post_data.write(CRLF)
if hasattr(data, 'read'):
copyfileobj(data, post_data)
elif isinstance(data, str):
post_data.write(data)
else:
for chunk in data:
post_data.write(chunk)
post_data.write(CRLF)
post_data.write('--' + boundary)
post_data.write('--' + CRLF)
length = post_data.tell()
post_data.seek(0)
kwargs.setdefault('CONTENT_LENGTH', str(length))
return self._request(
'POST',
PATH_INFO,
CONTENT_TYPE='multipart/form-data; boundary=%s' % boundary,
wsgi_input=post_data,
**kwargs
)
make_environ = TestApp.make_environ
class MockRequest(object):
"""
A mock object for testing WSGI applications
Synopsis::
>>> from pesto.core import to_wsgi
>>> from pesto.response import Response
>>> mock = MockWSGI('http://www.example.com/nelly')
>>> mock.request.request_uri
'http://www.example.com/nelly'
>>> def app(request):
... return Response(
... content_type = 'text/html; charset=UTF-8',
... x_whoa = 'Nelly',
... content = ['Yop!']
... )
>>> result = mock.run(to_wsgi(app)) #doctest: +ELLIPSIS
<pesto.wsgiutils.MockWSGI object at 0x...>
>>> mock.headers
[('Content-Type', 'text/html; charset=UTF-8'), ('X-Whoa', 'Nelly')]
>>> mock.output
['Yop!']
>>> print str(mock)
200 OK\r
Content-Type: text/html; charset=UTF-8\r
X-Whoa: Nelly\r
\r
Yop!
>>>
"""
def __init__(self, url=None, wsgi_input=None, SCRIPT_NAME='/', charset=None, **environ):
from pesto.core import to_wsgi
self.status = None
self.headers = None
self.output = None
self.exc_info = None
if wsgi_input is not None:
self.wsgi_input = wsgi_input
else:
self.wsgi_input = StringIO()
self.wsgi_errors = StringIO()
self.environ = {
'REQUEST_METHOD' : "GET",
'SCRIPT_NAME' : "/",
'PATH_INFO' : "",
'QUERY_STRING' : "",
'CONTENT_TYPE' : "",
'CONTENT_LENGTH' : "",
'SERVER_NAME' : "localhost",
'SERVER_PORT' : "80",
'SERVER_PROTOCOL' : "HTTP/1.0",
'REMOTE_ADDR' : "127.0.0.1",
'wsgi.version' : (1, 0),
'wsgi.url_scheme' : "http",
'wsgi.input' : self.wsgi_input,
'wsgi.errors' : self.wsgi_errors,
'wsgi.multithread' : False,
'wsgi.multiprocess' : False,
'wsgi.run_once' : False,
}
self.mockapp = to_wsgi(lambda request: Response(['ok']))
if url is not None:
scheme, netloc, path, params, query, fragment = urlparse(url)
if scheme == '':
scheme = 'http'
if netloc == '':
netloc = 'example.org'
if ':' in netloc:
server, port = netloc.split(':')
else:
if scheme == 'https':
port = '443'
else:
port = '80'
server = netloc
assert path.startswith(SCRIPT_NAME)
PATH_INFO = path[len(SCRIPT_NAME):]
if SCRIPT_NAME and SCRIPT_NAME[-1] == "/":
SCRIPT_NAME = SCRIPT_NAME[:-1]
PATH_INFO = "/" + PATH_INFO
self.environ.update({
'wsgi.url_scheme' : scheme,
'SERVER_NAME' : server,
'SERVER_PORT' : port,
'SCRIPT_NAME' : SCRIPT_NAME,
'QUERY_STRING' : query,
'PATH_INFO' : PATH_INFO,
})
self.environ.update(environ)
if self.environ['SCRIPT_NAME'] == '/':
self.environ['SCRIPT_NAME'] = ''
self.environ['PATH_INFO'] = '/' + self.environ['PATH_INFO']
self.request = Request(self.environ)
if charset is not None:
self.request.charset = charset
self.buf = StringIO()
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