Source code for zope.testbrowser.browser

# Copyright (c) 2005 Zope Foundation and Contributors.
# All Rights Reserved.
# This software is subject to the provisions of the Zope Public License,
# Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.
"""Webtest-based Functional Doctest interfaces

import http.client
import io
import re
import time
import urllib.parse
import urllib.request
import urllib.robotparser
from contextlib import contextmanager

import webtest
from bs4 import BeautifulSoup
from soupsieve import escape as css_escape
from wsgiproxy.proxies import TransparentProxy
from import Lazy
from zope.interface import implementer

import zope.testbrowser.cookies
from zope.testbrowser import interfaces

__docformat__ = "reStructuredText"

HTTPError = urllib.request.HTTPError
RegexType = type(re.compile(''))
_compress_re = re.compile(r"\s+")

class HostNotAllowed(Exception):

class RobotExclusionError(HTTPError):
    def __init__(self, *args):

# RFC 2606
_allowed_2nd_level = {'', '', ''}

_allowed = {'localhost', ''}

REDIRECTS = (301, 302, 303, 307)

class TestbrowserApp(webtest.TestApp):
    _last_fragment = ""
    restricted = False

    def _assertAllowed(self, url):
        parsed = urllib.parse.urlparse(url)
        if self.restricted:
            # We are in restricted mode, check host part only
            host = parsed.netloc.partition(':')[0]
            if host in _allowed:
            for dom in _allowed_2nd_level:
                if host.endswith('.%s' % dom):

            raise HostNotAllowed(url)
            # Unrestricted mode: retrieve robots.txt and check against it
            robotsurl = urllib.parse.urlunsplit(
                (parsed.scheme, parsed.netloc, '/robots.txt', '', ''))
            rp = urllib.robotparser.RobotFileParser()
            if not rp.can_fetch("*", url):
                msg = "request disallowed by robots.txt"
                raise RobotExclusionError(url, 403, msg, [], None)

    def do_request(self, req, status, expect_errors):

        response = super().do_request(req, status,
        # Store _last_fragment in response to preserve fragment for history
        # (goBack() will not lose fragment).
        response._last_fragment = self._last_fragment
        return response

    def _remove_fragment(self, url):
        # HACK: we need to preserve fragment part of url, but webtest strips it
        # from url on every request. So we override this protected method,
        # assuming it is called on every request and therefore _last_fragment
        # will not get outdated. ``getRequestUrlWithFragment()`` will
        # reconstruct url with fragment for the last request.
        scheme, netloc, path, query, fragment = urllib.parse.urlsplit(url)
        self._last_fragment = fragment
        return super()._remove_fragment(url)

    def getRequestUrlWithFragment(self, response):
        url = response.request.url
        if not self._last_fragment:
            return url
        return "{}#{}".format(url, response._last_fragment)

class SetattrErrorsMixin:
    _enable_setattr_errors = False

    def __setattr__(self, name, value):
        if self._enable_setattr_errors:
            # cause an attribute error if the attribute doesn't already exist
            getattr(self, name)

        # set the value
        object.__setattr__(self, name, value)

[docs] @implementer(interfaces.IBrowser) class Browser(SetattrErrorsMixin): """A web user agent.""" _contents = None _controls = None _counter = 0 _response = None _req_headers = None _req_content_type = None _req_referrer = None _history = None __html = None def __init__(self, url=None, wsgi_app=None): self.timer = Timer() self.raiseHttpErrors = True self.handleErrors = True self.followRedirects = True if wsgi_app is None: self.testapp = TestbrowserApp(TransparentProxy()) else: self.testapp = TestbrowserApp(wsgi_app) self.testapp.restricted = True self._req_headers = {} self._history = History() self._enable_setattr_errors = True self._controls = {} if url is not None: @property def url(self): """See zope.testbrowser.interfaces.IBrowser""" if self._response is None: return None return self.testapp.getRequestUrlWithFragment(self._response) @property def isHtml(self): """See zope.testbrowser.interfaces.IBrowser""" return self._response and 'html' in self._response.content_type @property def lastRequestSeconds(self): """See zope.testbrowser.interfaces.IBrowser""" return self.timer.elapsedSeconds @property def title(self): """See zope.testbrowser.interfaces.IBrowser""" if not self.isHtml: raise BrowserStateError('not viewing HTML') titles = self._html.find_all('title') if not titles: return None return self.toStr(titles[0].text)
[docs] def reload(self): """See zope.testbrowser.interfaces.IBrowser""" if self._response is None: raise BrowserStateError("no URL has yet been .open()ed") def make_request(args): return self.testapp.request(self._response.request) # _req_referrer is left intact, so will be the referrer (if any) of # the request being reloaded. self._processRequest(self.url, make_request)
[docs] def goBack(self, count=1): """See zope.testbrowser.interfaces.IBrowser""" resp = self._history.back(count, self._response) self._setResponse(resp)
@property def contents(self): """See zope.testbrowser.interfaces.IBrowser""" if self._response is not None: return self.toStr(self._response.body) else: return None @property def headers(self): """See zope.testbrowser.interfaces.IBrowser""" resptxt = [] resptxt.append('Status: %s' % self._response.status) for h, v in sorted(self._response.headers.items()): resptxt.append(str("{}: {}".format(h, v))) inp = '\n'.join(resptxt) stream = io.BytesIO(inp.encode('latin1')) return http.client.parse_headers(stream) @property def cookies(self): if self.url is None: raise RuntimeError("no request found") return zope.testbrowser.cookies.Cookies(self.testapp, self.url, self._req_headers)
[docs] def addHeader(self, key, value): """See zope.testbrowser.interfaces.IBrowser""" if (self.url and key.lower() in ('cookie', 'cookie2') and self.cookies.header): raise ValueError('cookies are already set in `cookies` attribute') self._req_headers[key] = value
[docs] def open(self, url, data=None, referrer=None): """See zope.testbrowser.interfaces.IBrowser""" url = self._absoluteUrl(url) if data is not None: def make_request(args): return, data, **args) else: def make_request(args): return self.testapp.get(url, **args) self._req_referrer = referrer self._processRequest(url, make_request)
def post(self, url, data, content_type=None, referrer=None): if content_type is not None: self._req_content_type = content_type self._req_referrer = referrer return, data) def _clickSubmit(self, form, control=None, coord=None): # find index of given control in the form url = self._absoluteUrl(form.action) if control: def make_request(args): index = form.fields[].index(control) return self._submit( form,, index, coord=coord, **args) else: def make_request(args): return self._submit(form, coord=coord, **args) self._req_referrer = self.url self._processRequest(url, make_request) def _processRequest(self, url, make_request): with self._preparedRequest(url) as reqargs: self._history.add(self._response) resp = make_request(reqargs) if self.followRedirects: remaining_redirects = 100 # infinite loops protection while resp.status_int in REDIRECTS and remaining_redirects: remaining_redirects -= 1 self._req_referrer = url url = urllib.parse.urljoin(url, resp.headers['location']) with self._preparedRequest(url) as reqargs: resp = self.testapp.get(url, **reqargs) assert remaining_redirects > 0, ( "redirects chain looks infinite") self._setResponse(resp) self._checkStatus() def _checkStatus(self): # if the headers don't have a status, I suppose there can't be an error if 'Status' in self.headers: code, msg = self.headers['Status'].split(' ', 1) code = int(code) if self.raiseHttpErrors and code >= 400: raise HTTPError(self.url, code, msg, [], None) def _submit(self, form, name=None, index=None, coord=None, **args): # A reimplementation of webtest.forms.Form.submit() to allow to insert # coords into the request fields = form.submit_fields(name, index=index) if coord is not None: fields.extend([('%s.x' % name, coord[0]), ('%s.y' % name, coord[1])]) url = self._absoluteUrl(form.action) if form.method.upper() != "GET": args.setdefault("content_type", form.enctype) else: parsed = urllib.parse.urlparse(url)._replace(query='', fragment='') url = urllib.parse.urlunparse(parsed) return form.response.goto(url, method=form.method, params=fields, **args) def _setResponse(self, response): self._response = response self._changed()
[docs] def follow(self, *args, **kw): """Select a link and follow it.""" self.getLink(*args, **kw).click()
def _getBaseUrl(self): # Look for <base href> tag and use it as base, if it exists url = self._response.request.url if b"<base" not in self._response.body: return url # we suspect there is a base tag in body, try to find href there html = self._html if not html.head: return url base = html.head.base if not base: return url return base['href'] or url
[docs] def getForm(self, id=None, name=None, action=None, index=None): """See zope.testbrowser.interfaces.IBrowser""" zeroOrOne([id, name, action], '"id", "name", and "action"') matching_forms = [] allforms = self._getAllResponseForms() for form in allforms: if ((id is not None and == id) or (name is not None and form.html.form.get('name') == name) or (action is not None and, form.action)) or id == name == action is None): matching_forms.append(form) if index is None and not any([id, name, action]): if len(matching_forms) == 1: index = 0 else: raise ValueError( 'if no other arguments are given, index is required.') form = disambiguate(matching_forms, '', index) return Form(self, form)
[docs] def getControl(self, label=None, name=None, index=None): """See zope.testbrowser.interfaces.IBrowser""" intermediate, msg, available = self._getAllControls( label, name, self._getAllResponseForms(), include_subcontrols=True) control = disambiguate(intermediate, msg, index, controlFormTupleRepr, available) return control
def _getAllResponseForms(self): """ Return set of response forms in the order they appear in ``self._response.form``.""" respforms = self._response.forms idxkeys = [k for k in respforms.keys() if isinstance(k, int)] return [respforms[k] for k in sorted(idxkeys)] def _getAllControls(self, label, name, forms, include_subcontrols=False): onlyOne([label, name], '"label" and "name"') # might be an iterator, and we need to iterate twice forms = list(forms) available = None if label is not None: res = self._findByLabel(label, forms, include_subcontrols) msg = 'label %r' % label elif name is not None: include_subcontrols = False res = self._findByName(name, forms) msg = 'name %r' % name if not res: available = list(self._findAllControls(forms, include_subcontrols)) return res, msg, available def _findByLabel(self, label, forms, include_subcontrols=False): # forms are iterable of mech_forms matches = re.compile(r'(^|\b|\W)%s(\b|\W|$)' % re.escape(normalizeWhitespace(label))).search found = [] for wtcontrol in self._findAllControls(forms, include_subcontrols): control = getattr(wtcontrol, 'control', wtcontrol) if control.type == 'hidden': continue for label in wtcontrol.labels: if matches(label): found.append(wtcontrol) break return found def _indexControls(self, form): # Unfortunately, webtest will remove all 'name' attributes from # form.html after parsing. But we need them (at least to locate labels # for radio buttons). So we are forced to reparse part of html, to # extract elements. html = BeautifulSoup(form.text, 'html.parser') tags = ('input', 'select', 'textarea', 'button') return html.find_all(tags) def _findByName(self, name, forms): return [c for c in self._findAllControls(forms) if == name] def _findAllControls(self, forms, include_subcontrols=False): res = [] for f in forms: if f not in self._controls: fc = [] allelems = self._indexControls(f) already_processed = set() for cname, wtcontrol in f.field_order: # we need to group checkboxes by name, but leave # the other controls in the original order, # even if the name repeats if isinstance(wtcontrol, webtest.forms.Checkbox): if cname in already_processed: continue already_processed.add(cname) wtcontrols = f.fields[cname] else: wtcontrols = [wtcontrol] for c in controlFactory(cname, wtcontrols, allelems, self): fc.append((c, False)) for subcontrol in c.controls: fc.append((subcontrol, True)) self._controls[f] = fc controls = [c for c, subcontrol in self._controls[f] if not subcontrol or include_subcontrols] res.extend(controls) return res def _changed(self): self._counter += 1 self._contents = None self._controls = {} self.__html = None @contextmanager def _preparedRequest(self, url): self.timer.start() headers = {} if self._req_referrer is not None: headers['Referer'] = self._req_referrer if self._req_content_type: headers['Content-Type'] = self._req_content_type headers['Connection'] = 'close' headers['Host'] = urllib.parse.urlparse(url).netloc headers['User-Agent'] = 'Python-urllib/2.4' headers.update(self._req_headers) extra_environ = {} if self.handleErrors: extra_environ['paste.throw_errors'] = None headers['X-zope-handle-errors'] = 'True' else: extra_environ['wsgi.handleErrors'] = False extra_environ['paste.throw_errors'] = True extra_environ['x-wsgiorg.throw_errors'] = True headers.pop('X-zope-handle-errors', None) kwargs = {'headers': sorted(headers.items()), 'extra_environ': extra_environ, 'expect_errors': True} yield kwargs self._req_content_type = None self.timer.stop() def _absoluteUrl(self, url): absolute = url.startswith('http://') or url.startswith('https://') if absolute: return str(url) if self._response is None: raise BrowserStateError( "can't fetch relative reference: not viewing any document") return str(urllib.parse.urljoin(self._getBaseUrl(), url))
[docs] def toStr(self, s): """Convert possibly unicode object to native string using response charset""" if not self._response.charset: return s if s is None: return None # Might be an iterable, especially the 'class' attribute. if isinstance(s, (list, tuple)): subs = [self.toStr(sub) for sub in s] if isinstance(s, tuple): return tuple(subs) return subs if isinstance(s, bytes): return s.decode(self._response.charset) return s
@property def _html(self): if self.__html is None: self.__html = self._response.html return self.__html
def controlFactory(name, wtcontrols, elemindex, browser): assert len(wtcontrols) > 0 first_wtc = wtcontrols[0] checkbox = isinstance(first_wtc, webtest.forms.Checkbox) # Create control list if checkbox: ctrlelems = [(wtc, elemindex[wtc.pos]) for wtc in wtcontrols] controls = [CheckboxListControl(name, ctrlelems, browser)] else: controls = [] for wtc in wtcontrols: controls.append(simpleControlFactory( wtc, wtc.form, elemindex, browser)) return controls def simpleControlFactory(wtcontrol, form, elemindex, browser): if isinstance(wtcontrol, webtest.forms.Radio): elems = [e for e in elemindex if e.attrs.get('name') ==] return RadioListControl(wtcontrol, form, elems, browser) elem = elemindex[wtcontrol.pos] if isinstance(wtcontrol, (webtest.forms.Select, webtest.forms.MultipleSelect)): return ListControl(wtcontrol, form, elem, browser) elif isinstance(wtcontrol, webtest.forms.Submit): if wtcontrol.attrs.get('type', 'submit') == 'image': return ImageControl(wtcontrol, form, elem, browser) else: return SubmitControl(wtcontrol, form, elem, browser) else: return Control(wtcontrol, form, elem, browser) @implementer(interfaces.ILink) class Link(SetattrErrorsMixin): def __init__(self, link, browser, baseurl=""): self._link = link self.browser = browser self._baseurl = baseurl self._browser_counter = self.browser._counter self._enable_setattr_errors = True def click(self): if self._browser_counter != self.browser._counter: raise interfaces.ExpiredError, referrer=self.browser.url) @property def url(self): relurl = self._link['href'] return self.browser._absoluteUrl(relurl) @property def text(self): txt = normalizeWhitespace(self._link.text) return self.browser.toStr(txt) @property def tag(self): return str( @property def attrs(self): toStr = self.browser.toStr return {toStr(k): toStr(v) for k, v in self._link.attrs.items()} def __repr__(self): return "<{} text='{}' url='{}'>".format( self.__class__.__name__, normalizeWhitespace(self.text), self.url) def controlFormTupleRepr(wtcontrol): return wtcontrol.mechRepr() @implementer(interfaces.IControl) class Control(SetattrErrorsMixin): _enable_setattr_errors = False def __init__(self, control, form, elem, browser): self._control = control self._form = form self._elem = elem self.browser = browser self._browser_counter = self.browser._counter # disable addition of further attributes self._enable_setattr_errors = True @property def disabled(self): return 'disabled' in self._control.attrs @property def readonly(self): return 'readonly' in self._control.attrs @property def type(self): typeattr = self._control.attrs.get('type', None) if typeattr is None: # try to figure out type by tag if self._control.tag == 'textarea': return 'textarea' else: # By default, inputs are of 'text' type return 'text' return self.browser.toStr(typeattr) @property def name(self): if is None: return None return self.browser.toStr( @property def multiple(self): return 'multiple' in self._control.attrs @property def value(self): if self.type == 'file': if not self._control.value: return None if self.type == 'image': if not self._control.value: return '' if isinstance(self._control, webtest.forms.Submit): return self.browser.toStr(self._control.value_if_submitted()) val = self._control.value if val is None: return None return self.browser.toStr(val) @value.setter def value(self, value): if self._browser_counter != self.browser._counter: raise interfaces.ExpiredError if self.readonly: raise AttributeError("Trying to set value of readonly control") if self.type == 'file': self.add_file(value, content_type=None, filename=None) else: self._control.value = value def add_file(self, file, content_type, filename): if self.type != 'file': raise TypeError("Can't call add_file on %s controls" % self.type) if hasattr(file, 'read'): contents = else: contents = file self._form[] = webtest.forms.Upload(filename or '', contents, content_type) def clear(self): if self._browser_counter != self.browser._counter: raise zope.testbrowser.interfaces.ExpiredError self.value = None def __repr__(self): return "<{} name='{}' type='{}'>".format( self.__class__.__name__,, self.type) @Lazy def labels(self): return [self.browser.toStr(label) for label in getControlLabels(self._elem, self._form.html)] @property def controls(self): return [] def mechRepr(self): # emulate mechanize control representation toStr = self.browser.toStr ctrl = self._control if isinstance(ctrl, (webtest.forms.Text, webtest.forms.Email)): tp = ctrl.attrs.get('type') infos = [] if 'readonly' in ctrl.attrs or tp == 'hidden': infos.append('readonly') if 'disabled' in ctrl.attrs: infos.append('disabled') classnames = {'password': "PasswordControl", 'hidden': "HiddenControl", 'email': "EMailControl", } clname = classnames.get(tp, "TextControl") return "<{}({}={}){}>".format( clname, toStr(, toStr(ctrl.value), ' (%s)' % (', '.join(infos)) if infos else '') if isinstance(ctrl, (webtest.forms.File, webtest.forms.Field)): return repr(ctrl) + "<-- unknown" raise NotImplementedError(str((self, ctrl))) @implementer(interfaces.ISubmitControl) class SubmitControl(Control): def click(self): if self._browser_counter != self.browser._counter: raise interfaces.ExpiredError self.browser._clickSubmit(self._form, self._control) @Lazy def labels(self): labels = super().labels labels.append(self._control.value_if_submitted()) if self._elem.text: labels.append(normalizeWhitespace(self._elem.text)) return [label for label in labels if label] def mechRepr(self): name = if is not None else "<None>" value = self.value if self.value is not None else "<None>" extra = ' (disabled)' if self.disabled else '' # Mechanize explicitly told us submit controls were readonly, as # if they could be any other way.... *sigh* Let's take this # opportunity and strip that off. return "<SubmitControl({}={}){}>".format(name, value, extra) @implementer(interfaces.IListControl) class ListControl(Control): def __init__(self, control, form, elem, browser): super().__init__(control, form, elem, browser) # HACK: set default value of a list control and then forget about # initial default values. Otherwise webtest will not allow to set None # as a value of select and radio controls. v = control.value if v: control.value = v # Uncheck all the options Carefully: WebTest used to have # 2-tuples here before commit 1031d82e, and 3-tuples since then. control.options = [option[:1] + (False,) + option[2:] for option in control.options] @property def type(self): return 'select' @property def value(self): val = self._control.value if val is None: return [] if self.multiple and isinstance(val, (list, tuple)): return [self.browser.toStr(v) for v in val] else: return [self.browser.toStr(val)] @value.setter def value(self, value): if not value: self._set_falsy_value(value) else: if not self.multiple and isinstance(value, (list, tuple)): value = value[0] self._control.value = value @property def _selectedIndex(self): return self._control.selectedIndex @_selectedIndex.setter def _selectedIndex(self, index): self._control.force_value(webtest.forms.NoValue) self._control.selectedIndex = index def _set_falsy_value(self, value): self._control.force_value(value) @property def displayValue(self): """See zope.testbrowser.interfaces.IListControl""" # not implemented for anything other than select; cvalue = self._control.value if cvalue is None: return [] if not isinstance(cvalue, list): cvalue = [cvalue] alltitles = [] for key, titles in self._getOptions(): if key in cvalue: alltitles.append(titles[0]) return alltitles @displayValue.setter def displayValue(self, value): if self._browser_counter != self.browser._counter: raise interfaces.ExpiredError if isinstance(value, str): value = [value] if not self.multiple and len(value) > 1: raise ItemCountError( "single selection list, must set sequence of length 0 or 1") values = [] found = set() for key, titles in self._getOptions(): matches = {v for t in titles for v in value if v in t} if matches: values.append(key) found.update(matches) for v in value: if v not in found: raise ItemNotFoundError(v) self.value = values @property def displayOptions(self): """See zope.testbrowser.interfaces.IListControl""" return [titles[0] for key, titles in self._getOptions()] @property def options(self): """See zope.testbrowser.interfaces.IListControl""" return [key for key, title in self._getOptions()] def getControl(self, label=None, value=None, index=None): if self._browser_counter != self.browser._counter: raise interfaces.ExpiredError return getControl(self.controls, label, value, index) @property def controls(self): if self._browser_counter != self.browser._counter: raise interfaces.ExpiredError ctrls = [] for idx, elem in enumerate('option')): ctrls.append(ItemControl(self, elem, self._form, self.browser, idx)) return ctrls def _getOptions(self): return [(c.optionValue, c.labels) for c in self.controls] def mechRepr(self): # TODO: figure out what is replacement for "[*, ambiguous])" return "<SelectControl(%s=[*, ambiguous])>" % class RadioListControl(ListControl): _elems = None def __init__(self, control, form, elems, browser): super().__init__( control, form, elems[0], browser) self._elems = elems @property def type(self): return 'radio' def __repr__(self): # Return backwards compatible representation return "<ListControl name='%s' type='radio'>" % @property def controls(self): if self._browser_counter != self.browser._counter: raise interfaces.ExpiredError for idx, opt in enumerate(self._elems): yield RadioItemControl(self, opt, self._form, self.browser, idx) @Lazy def labels(self): # Parent radio button control has no labels. Children are labeled. return [] def _set_falsy_value(self, value): # HACK: Force unsetting selected value, by avoiding validity check. # Note, that force_value will not work for webtest.forms.Radio # controls. self._control.selectedIndex = None @implementer(interfaces.IListControl) class CheckboxListControl(SetattrErrorsMixin): def __init__(self, name, ctrlelems, browser): = name self.browser = browser self._browser_counter = self.browser._counter self._ctrlelems = ctrlelems self._enable_setattr_errors = True @property def options(self): opts = [self._trValue(c.optionValue) for c in self.controls] return opts @property def displayOptions(self): return [c.labels[0] for c in self.controls] @property def value(self): ctrls = self.controls val = [self._trValue(c.optionValue) for c in ctrls if c.selected] if len(self._ctrlelems) == 1 and val == [True]: return True return val @value.setter def value(self, value): ctrls = self.controls if isinstance(value, (list, tuple)): for c in ctrls: c.selected = c.optionValue in value else: ctrls[0].selected = value @property def displayValue(self): return [c.labels[0] for c in self.controls if c.selected] @displayValue.setter def displayValue(self, value): found = set() for c in self.controls: matches = {v for v in value if v in c.labels} c.selected = bool(matches) found.update(matches) for v in value: if v not in found: raise ItemNotFoundError(v) @property def multiple(self): return True @property def disabled(self): return all('disabled' in e.attrs for c, e in self._ctrlelems) @property def type(self): return 'checkbox' def getControl(self, label=None, value=None, index=None): if self._browser_counter != self.browser._counter: raise interfaces.ExpiredError return getControl(self.controls, label, value, index) @property def controls(self): return [CheckboxItemControl(self, c, e, c.form, self.browser, i) for i, (c, e) in enumerate(self._ctrlelems)] def clear(self): if self._browser_counter != self.browser._counter: raise zope.testbrowser.interfaces.ExpiredError self.value = [] def mechRepr(self): return "<SelectControl(%s=[*, ambiguous])>" % self.browser.toStr( @Lazy def labels(self): return [] def __repr__(self): # Return backwards compatible representation return "<ListControl name='%s' type='checkbox'>" % def _trValue(self, chbval): return True if chbval == 'on' else chbval @implementer(interfaces.IImageSubmitControl) class ImageControl(Control): def click(self, coord=(1, 1)): if self._browser_counter != self.browser._counter: raise interfaces.ExpiredError self.browser._clickSubmit(self._form, self._control, coord) def mechRepr(self): return "ImageControl???" # TODO @implementer(interfaces.IItemControl) class ItemControl(SetattrErrorsMixin): def __init__(self, parent, elem, form, browser, index): self._parent = parent self._elem = elem self._index = index self._form = form self.browser = browser self._browser_counter = self.browser._counter self._enable_setattr_errors = True @property def control(self): if self._browser_counter != self.browser._counter: raise interfaces.ExpiredError return self._parent @property def _value(self): return self._elem.attrs.get('value', self._elem.text) @property def disabled(self): return 'disabled' in self._elem.attrs @property def selected(self): """See zope.testbrowser.interfaces.IControl""" if self._parent.multiple: return self._value in self._parent.value else: return self._parent._selectedIndex == self._index @selected.setter def selected(self, value): if self._browser_counter != self.browser._counter: raise interfaces.ExpiredError if self._parent.multiple: values = list(self._parent.value) if value: values.append(self._value) else: values = [v for v in values if v != self._value] self._parent.value = values else: if value: self._parent._selectedIndex = self._index else: self._parent.value = None @property def optionValue(self): return self.browser.toStr(self._value) @property def value(self): # internal alias for convenience implementing getControl() return self.optionValue def click(self): if self._browser_counter != self.browser._counter: raise interfaces.ExpiredError self.selected = not self.selected def __repr__(self): return ( "<ItemControl name='%s' type='select' optionValue=%r selected=%r>" ) % (, self.optionValue, self.selected) @Lazy def labels(self): labels = [self._elem.attrs.get('label'), self._elem.text] return [self.browser.toStr(normalizeWhitespace(lbl)) for lbl in labels if lbl] def mechRepr(self): toStr = self.browser.toStr contents = toStr(normalizeWhitespace(self._elem.text)) id = toStr(self._elem.attrs.get('id')) label = toStr(self._elem.attrs.get('label', contents)) value = toStr(self._value) name = toStr(self._elem.attrs.get('name', value)) # XXX wha???? return ( "<Item name='%s' id=%s contents='%s' value='%s' label='%s'>" ) % (name, id, contents, value, label) class RadioItemControl(ItemControl): @property def optionValue(self): return self.browser.toStr(self._elem.attrs.get('value')) @Lazy def labels(self): return [self.browser.toStr(label) for label in getControlLabels(self._elem, self._form.html)] def __repr__(self): return ( "<ItemControl name='%s' type='radio' optionValue=%r selected=%r>" ) % (, self.optionValue, self.selected) def click(self): # Radio buttons cannot be unselected by clicking on them, see # if not self.selected: super().click() def mechRepr(self): toStr = self.browser.toStr id = toStr(self._elem.attrs.get('id')) value = toStr(self._elem.attrs.get('value')) name = toStr(self._elem.attrs.get('name')) props = [] if == 'label': props.append(( '__label', {'__text': toStr(self._elem.parent.text)})) if self.selected: props.append(('checked', 'checked')) props.append(('type', 'radio')) props.append(('name', name)) props.append(('value', value)) props.append(('id', id)) propstr = ' '.join('{}={!r}'.format(pk, pv) for pk, pv in props) return "<Item name='{}' id='{}' {}>".format(value, id, propstr) class CheckboxItemControl(ItemControl): _control = None def __init__(self, parent, wtcontrol, elem, form, browser, index): super().__init__(parent, elem, form, browser, index) self._control = wtcontrol @property def selected(self): """See zope.testbrowser.interfaces.IControl""" return self._control.checked @selected.setter def selected(self, value): if self._browser_counter != self.browser._counter: raise interfaces.ExpiredError self._control.checked = value @property def optionValue(self): return self.browser.toStr(self._control._value or 'on') @Lazy def labels(self): return [self.browser.toStr(label) for label in getControlLabels(self._elem, self._form.html)] def __repr__(self): return ( "<ItemControl name='%s' type='checkbox' " "optionValue=%r selected=%r>" ) % (, self.optionValue, self.selected) def mechRepr(self): id = self.browser.toStr(self._elem.attrs.get('id')) value = self.browser.toStr(self._elem.attrs.get('value')) name = self.browser.toStr(self._elem.attrs.get('name')) props = [] if == 'label': props.append(('__label', {'__text': self.browser.toStr( self._elem.parent.text)})) if self.selected: props.append(('checked', 'checked')) props.append(('name', name)) props.append(('type', 'checkbox')) props.append(('id', id)) props.append(('value', value)) propstr = ' '.join('{}={!r}'.format(pk, pv) for pk, pv in props) return "<Item name='{}' id='{}' {}>".format(value, id, propstr) @implementer(interfaces.IForm) class Form(SetattrErrorsMixin): """HTML Form""" def __init__(self, browser, form): """Initialize the Form browser - a Browser instance form - a webtest.Form instance """ self.browser = browser self._form = form self._browser_counter = self.browser._counter self._enable_setattr_errors = True @property def action(self): return self.browser._absoluteUrl(self._form.action) @property def method(self): return str(self._form.method) @property def enctype(self): return str(self._form.enctype) @property def name(self): return str(self._form.html.form.get('name')) @property def id(self): """See zope.testbrowser.interfaces.IForm""" return str( def submit(self, label=None, name=None, index=None, coord=None): """See zope.testbrowser.interfaces.IForm""" if self._browser_counter != self.browser._counter: raise interfaces.ExpiredError form = self._form if label is not None or name is not None: controls, msg, available = self.browser._getAllControls( label, name, [form]) controls = [c for c in controls if isinstance(c, (ImageControl, SubmitControl))] control = disambiguate( controls, msg, index, controlFormTupleRepr, available) self.browser._clickSubmit(form, control._control, coord) else: # JavaScript sort of submit if index is not None or coord is not None: raise ValueError( 'May not use index or coord without a control') self.browser._clickSubmit(form) def getControl(self, label=None, name=None, index=None): """See zope.testbrowser.interfaces.IBrowser""" if self._browser_counter != self.browser._counter: raise interfaces.ExpiredError intermediate, msg, available = self.browser._getAllControls( label, name, [self._form], include_subcontrols=True) return disambiguate(intermediate, msg, index, controlFormTupleRepr, available) @property def controls(self): return list(self.browser._findAllControls( [self._form], include_subcontrols=True)) def disambiguate(intermediate, msg, index, choice_repr=None, available=None): if intermediate: if index is None: if len(intermediate) > 1: if choice_repr: msg += ' matches:' + ''.join([ '\n %s' % choice_repr(choice) for choice in intermediate]) raise AmbiguityError(msg) else: return intermediate[0] else: try: return intermediate[index] except IndexError: msg = ( '%s\nIndex %d out of range, available choices are 0...%d' ) % (msg, index, len(intermediate) - 1) if choice_repr: msg += ''.join(['\n %d: %s' % (n, choice_repr(choice)) for n, choice in enumerate(intermediate)]) else: if available: msg += '\navailable items:' + ''.join([ '\n %s' % choice_repr(choice) for choice in available]) elif available is not None: # empty list msg += '\n(there are no form items in the HTML)' raise LookupError(msg) def onlyOne(items, description): total = sum([bool(i) for i in items]) if total == 0 or total > 1: raise ValueError( "Supply one and only one of %s as arguments" % description) def zeroOrOne(items, description): if sum([bool(i) for i in items]) > 1: raise ValueError( "Supply no more than one of %s as arguments" % description) def getControl(controls, label=None, value=None, index=None): onlyOne([label, value], '"label" and "value"') if label is not None: options = [c for c in controls if any(isMatching(control_label, label) for control_label in c.labels)] msg = 'label %r' % label elif value is not None: options = [c for c in controls if isMatching(c.value, value)] msg = 'value %r' % value res = disambiguate(options, msg, index, controlFormTupleRepr, available=controls) return res def getControlLabels(celem, html): labels = [] # In case celem is contained in label element, use its text as a label if == 'label': labels.append(normalizeWhitespace(celem.parent.text)) # find all labels, connected by 'for' attribute controlid = celem.attrs.get('id') if controlid: forlbls ='label[for="%s"]' % controlid) labels.extend([normalizeWhitespace(label.text) for label in forlbls]) return [label for label in labels if label is not None] def normalizeWhitespace(string): return ' '.join(string.split()) def isMatching(string, expr): """Determine whether ``expr`` matches to ``string`` ``expr`` can be None, plain text or regular expression. * If ``expr`` is ``None``, ``string`` is considered matching * If ``expr`` is plain text, its equality to ``string`` will be checked * If ``expr`` is regexp, regexp matching agains ``string`` will be performed """ if expr is None: return True if isinstance(expr, RegexType): return expr.match(normalizeWhitespace(string)) else: return normalizeWhitespace(expr) in normalizeWhitespace(string) class Timer: start_time = 0 end_time = 0 def _getTime(self): return time.perf_counter() def start(self): """Begin a timing period""" self.start_time = self._getTime() self.end_time = None def stop(self): """End a timing period""" self.end_time = self._getTime() @property def elapsedSeconds(self): """Elapsed time from calling `start` to calling `stop` or present time If `stop` has been called, the timing period stopped then, otherwise the end is the current time. """ if self.end_time is None: end_time = self._getTime() else: end_time = self.end_time return end_time - self.start_time def __enter__(self): self.start() def __exit__(self, exc_type, exc_value, traceback): self.stop() class History: """ Though this will become public, the implied interface is not yet stable. """ def __init__(self): self._history = [] # LIFO def add(self, response): self._history.append(response) def back(self, n, _response): response = _response while n > 0 or response is None: try: response = self._history.pop() except IndexError: raise BrowserStateError("already at start of history") n -= 1 return response def clear(self): del self._history[:] class AmbiguityError(ValueError): pass class BrowserStateError(Exception): pass class LinkNotFoundError(IndexError): pass class ItemCountError(ValueError): pass class ItemNotFoundError(ValueError): pass