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Layers for zope.testing to simplify test setups

Project Description

van.testing provides tools for testing zope3/WSGI based applications that do not use the ZODB or local utilities.

Testing Utilities

The most common use of this testing module is functional testing zope applications. It provides tools to setup layers which load the configuration ZCML as well as setting up wsgi_intercept in a layer.

This test is part of such a layer (setup in van.testing.tests.FunctionalLayer):

>>> from wsgi_intercept import WSGI_HTTPConnection as HTTPConnection
>>> conn = HTTPConnection('localhost', 80)
>>> conn.request('GET', '/')
>>> r = conn.getresponse()
>>> print # doctest: +ELLIPSIS
{'HTTP_ACCEPT_ENCODING': 'identity',
 'HTTP_HOST': 'localhost',
 'PATH_INFO': '/',
 'SERVER_NAME': 'localhost',
 'SERVER_PORT': '80',
 'wsgi.errors': <cStringIO.StringO object at ...>,
 'wsgi.input': <cStringIO.StringI object at ...>,
 'wsgi.multiprocess': 0,
 'wsgi.multithread': 0,
 'wsgi.run_once': 0,
 'wsgi.url_scheme': 'http',
 'wsgi.version': (1, 0)}
Marker: MARKER


Some basic layers useful for making test setups.

>>> import os.path
>>> from van.testing.layer import zcml_layer, null_layer

A zcml layer which sets up and tears down a zcml test harness (but is much simpler than that provided with

>>> class ZCMLLayer:
...     zcml = os.path.join(os.path.dirname(__file__), 'ftesting.zcml')
>>> zcml_layer(ZCMLLayer)

Some default layers are provided for use with zope.testing, a “null” layer that specifically does nothing. This is useful for layers which inherit from other layers but where you don’t want setup/teardown functions run twice (is this a zope.testing bug?):

>>> class ExampleNullLayer(ZCMLLayer):
...     pass
>>> null_layer(ExampleNullLayer)

This test runs in the layer van.testing.tests.ZCMLLayer, so we can get the “test” utility but not the test_extra utility (see zcml_features.txt for an example of a zcml layer with features):

>>> from zope.interface import Interface
>>> from zope.component import queryUtility
>>> queryUtility(Interface, name="test", default='None')
>>> queryUtility(Interface, name="test_extra", default='None')

3.0.0 (2009-10-28)

  • Add an option to have a zcml_features attribute on a zcml layer indicating the features to load when loading the zcml.

2.0.1 (2009-04-07)

  • Allow users to specify the domain and port of the wsgi_intercept_layer by adding those attributes to the class.
  • Fix testbrowser support a bit so that it performs more like zope.testbrowser.testing.Browser.
  • Remove support for local component registrys ( This brings in the whole ZODB as’s tests currently depend on it.

2.0.0 (2009-04-01)

  • Remove dependencies by using zope.configuration.xmlconfig to setup zcml rather than This leaves out some security configuration but the win from less dependencies is massive. In my tests, no tests had any issues with this.
  • Add a wsgi_intercept layer and a functional_layer that combines both zcml and wsgi_intercept layer.

1.0.0 (2008-11-21)

  • Initial Release
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