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Extensions for zope.testbrowser

Project description

Extensions for the Zope 3 testbrowser

This package is intended to provide extended versions of the Zope 3 testbrowser. Especially those extensions that introduce dependencies to more external products, like lxml.

Extension: lxml-support

All HTML pages are parsed and provided as an element-tree.

Extended testbrowser

This package provides some extensions to zope.testbrowser. These are not included in the core because they have extra dependencies, such as lxml.

  • lxml

etree support

The extended test browser allows parsing of the result of a request into an etree using lxml (if the content type is text/html or text/xml).

This is useful to perform more detailed analysis of web pages using e.g. XPath and related XML technologies.


>>> from z3c.etestbrowser.testing import ExtendedTestBrowser
>>> browser = ExtendedTestBrowser()
>>> print(browser.contents)
<!DOCTYPE ...>
>>> browser.etree
<Element html at ...>
>>> browser.etree.xpath('//body')
[<Element body at ...>]
Strict XML

It is possible to force the test browser to use the xml parser:

>>> browser.xml_strict
>>> browser.xml_strict = True
>>> browser.etree
<Element {}html at ...>
>>> browser.etree.xpath(
...     '//html:body', namespaces={'html': ''})
[<Element {}body at ...>]
LXML unicode support

A couple of variations of libxml2 might interpret UTF-8 encoded strings incorrectly. We have a workaround for that. Let’s have a look at a view that contains a German umlaut:

>>> browser.xml_strict = False
>>> browser.etree.xpath("//span")[0].text == u'K\xfcgelblitz.'
Invalid XML/HTML responses

Responses that contain a body with invalid XML/HTML will cause an error when accessing the etree or normalized_contents attribute, but will load fine for general TestBrowser use:

>>> browser.contents
>>> browser.etree
Traceback (most recent call last):
ValueError: ...
>>> browser.normalized_contents
Traceback (most recent call last):
ValueError: ...
HTML/XML normalization

The extended test browser allows normalized output of HTML and XML which makes testing examples with HTML or XML a bit easier when unimportant details like whitespace are changing:

>>> print(browser.contents)


>>> print(browser.normalized_contents)

Using testbrowser on the internet

The z3c.etestbrowser.browser module exposes an ExtendedTestBrowser class that simulates a web browser similar to Mozilla Firefox or IE.

>>> from z3c.etestbrowser.browser import ExtendedTestBrowser
>>> browser = ExtendedTestBrowser()

It can send arbitrary headers; this is helpful for setting the language value, so that your tests format values the way you expect in your tests, if you rely on zope.i18n locale-based formatting or a similar approach.

>>> browser.addHeader('Accept-Language', 'en-US')

The browser can open web pages:

>>> print(browser.contents)
<!DOCTYPE html ...
...The World Wide Web Consortium (W3C) is an international community...


4.0 (2023-02-21)

  • Drop support for Python 2.7, 3.5, 3.6.

  • Add support for Python 3.8, 3.9, 3.10, 3.11.

  • Drop deprecated support for python test.

  • Drop deprecated z3c.etestbrowser.wsgi.

3.0.1 (2019-03-05)

  • Fix deprecation declaration in .wsgi.

3.0 (2019-03-04)

Backwards incompatible changes

  • Add support for zope.testbrowser >= 5.0 which speaks WSGI this requires tests to be updated to WSGI.

  • Deprecate z3c.etestbrowser.wsgi which used to contain the WSGI variant as it is now the default.

  • Drop the extra introduced in version 2.0.0 as it dropped its special zope.testbrowser support.

  • Drop .browser.ExtendedTestBrowser.pretty_print as its requirements are deprecated or even removed from Python’s StdLib.

  • Adapt the code to newer lxml versions which no longer raise an exception if the string to be parsed by lxml.etree is empty. We now raise a ValueError in this case.


  • Add support for Python 3.6 up to 3.7.

2.0.1 (2015-11-09)

  • Fix over_the_wire.txt

2.0.0 (2011-10-13)

  • No longer depending on but on zope.testbrowser >= 4.0 for the WSGI flavor of testbrowser.

  • Added a extra. You should use this extra if you want to use the browser in z3c.etestbrowser.testing. (The base testbrowser used there has been moved from zope.testbrowser to in version 4.0.)

  • Renamed z3c.etestbrowser.wsgi.ExtendedTestBrowser to Browser for equality with zope.testbrowser but kept ExtendedTestBrowser for backwards compatibility.

1.5.0 (2010-08-22)

  • Added z3c.etestbrowser.wsgi.ExtendedTestBrowser, a variant that can be used when the test layer was set up using using

1.4.0 (2010-07-08)

  • Took zope.securitypolicy refactoring and zope.testing.doctest deprecation into account.

  • Added z3c.etestbrowser.browser.ExtendedTestBrowser, a variant that speaks HTTP instead of directly talking to the publisher talks to the publisher, see Using testbrowser on the internet.

1.3.1 (2010-01-18)

  • Added doctest to long_description to show up on pypi.

1.3.0 (2009-07-23)

  • Updgraded pacakge to lxml 2.2.

  • Fixed bug with normalized_contents which would break the open function of test browser if content wasn’t parsable as HTML/XML.

1.2.0 (2008-05-29)

  • Added normalized_contents attribute that reindents and normalizes the etree structure of a document and allows easier to read HTML/XML examples in doctests.

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