Testlayers minimize setup costs for functional tests in zope3. One can specify a zcml file which is loaded when a specific suite is run. This reduces startup time for the test a lot compared to functional tests which use the site wide ftesting.zcml configuration file, which may include packages the test don’t need at all.

Steps to set up a layered functional test for your package:

create a ftests.py file in your package directory with the following contents:

from zope.app.testing import functional

functional.defineLayer('TestLayer', 'ftesting.zcml')

def test_suite():
suite = functional.FunctionalDocFileSuite(
'README.txt',
)
suite.layer = TestLayer
return suite

if __name__ == '__main__':
unittest.main(defaultTest='test_suite')

Where ‘README.txt’ is a normal REST file which contains the tests.

Then create the ‘ftesting.zcml’ file wher you can do your setup for the specific test.

Here is a basic example which sets up security etc.

<configure xmlns="http://namespaces.zope.org/zope"
xmlns:browser="http://namespaces.zope.org/browser"
i18n_domain="zope">
<include package="zope.app" />
<include package="zope.app.server" />
<include package="zope.app.authentication" />
<include package="zope.app.securitypolicy" file="meta.zcml" />
<securityPolicy
component="zope.app.securitypolicy.zopepolicy.ZopeSecurityPolicy" />
<include package="zope.app.securitypolicy" />
<!-- we ought to use this for the tests
<include package="zope.app.i18n.tests" />
-->

<role id="zope.Anonymous" title="Everybody"
description="All users have this role implicitly" />
<role id="zope.Manager" title="Site Manager" />
<role id="zope.Member" title="Site Member" />
<grantAll role="zope.Manager" />

<principal
id="zope.manager"
title="Administrator"
login="mgr"
password="mgrpw" />

<grant
role="zope.Manager"
principal="zope.manager"
/>

</configure>

You can now run the test from your instance_home:

./bin/test -fs your.package

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