[Zope3-Users] testing: provideInterface and vocabulary named 'Interfaces'

[Christian Lück]

Hi,

I'm stuck with testing (= developing) my components.
I have an interface with a zope.schema.Choice field where the vocabulary
is zope3's vocabulary named 'Interfaces' from the zope.app.component
package.

The problem with testing occures when I try to assign a value to the
field, inspite of providing the interface in the test and having
registered the InterfaceVocabulary from zope.app.component.vocabulary
for the test. The traceback says that an adapter is missing - but which
one?  A part of the registry seems to be missing.
(I don't want to bring up the whole system because of performance--I
develop components while writing tests in emacs doctest-mode and driving
the test again and again ...)


Here is the interface:

import zope.interface
import zope.schema
from zope.app.container.interfaces import IContained, IContainer
from zope.app.container.constraints import containers, contains
from zope.i18nmessageid import MessageFactory

_ = ReferatoryMessageFactory = MessageFactory('quotationtool')

...

class ICategorizableItemDescription(IContained):
    """A description of a ZOPE3 interface which users can
    understand. It is used to create a term for the vocabulary of
    categorizable item classes. The label will be used as the title
    of the term instead of the python module name of the
    interface."""

    containers(ICategorizableItemDescriptions)

    interface = zope.schema.Choice(
        title = _('icategorizableitemdescription-interface-title',
                  u"Interface"),
        description = _('icategorizableitemdescription-interface-desc',
                        u"Choose an ZOPE-Interface from the list."),
        required = True,
        vocabulary = 'Interfaces',
        )

    label = zope.schema.TextLine(
        title = _('icategorizableitemdescription-label-title',
                  u"Label"),
        description = _('icategorrizableitemdescription-label-description',
                        u"Descriptive term for the interface which users
can understand."),
        required = True,
        )


Here is what is brought up for the test:

...

from quotationtool.categorization.weighteditemscontainer import
updateWeightedItemsContainerOrder
from quotationtool.categorization.categorizableitemdescription import
categorizableItemDescriptionVocabulary
from quotationtool.categorization.mode import modeVocabulary

def setUp(test):
    zope.component.testing.setUp(test)
    zope.component.eventtesting.setUp(test)
    zope.component.provideHandler(updateWeightedItemsContainerOrder)
    vocabulary.setVocabularyRegistry(vocabulary.VocabularyRegistry())
    vr = vocabulary.getVocabularyRegistry()
    vr.register('quotationtool.categorization.categorizableitemdescription',
                categorizableItemDescriptionVocabulary)
    vr.register('quotationtool.categorization.mode',
                modeVocabulary)
    vr.register('Interfaces',
                InterfacesVocabulary)

...


Here are the first lines of the test and the traceback:


    >>> from quotationtool.categorization import interfaces
    >>> import zope.interface
    >>> import zope.component
    >>> from quotationtool.categorization.categorizableitemdescription\
    ...     import CategorizableItemDescription,
CategorizableItemDescriptions

    >>> publication_desc = CategorizableItemDescription()
    >>> class IPublication(zope.interface.Interface):
    ...     pass

    >>> zope.component.interface.provideInterface('.IPublication',
IPublication)
    >>> iface = zope.component.interface.getInterface(None, '.IPublication')
    >>> iface == IPublication
    True

    >>> publication_desc.interface = IPublication
    Traceback (most recent call last):
      File
"/home/clueck/.buildout-eggs/zope.testing-3.7.1-py2.4.egg/zope/testing/doctest.py",
line
1356, in __run
        compileflags, 1) in test.globs
      File "<doctest README.txt[10]>", line 1, in ?
        publication_desc.interface = IPublication
      File
"/home/clueck/.buildout-eggs/zope.schema-3.5.0a2-py2.4.egg/zope/schema/fieldproperty.py",
 line 51, in __set__
        field = self.__field.bind(inst)
      File
"/home/clueck/.buildout-eggs/zope.schema-3.5.0a2-py2.4.egg/zope/schema/_field.py",
line 2
86, in bind
        clone.vocabulary = vr.get(object, self.vocabularyName)
      File
"/home/clueck/.buildout-eggs/zope.schema-3.5.0a2-py2.4.egg/zope/schema/vocabulary.py",
li
ne 166, in get
        return vtype(object)
      File
"/home/clueck/.buildout-eggs/zope.app.component-3.5.0-py2.4.egg/zope/app/component/vocabu
lary.py", line 197, in __init__
        utils = zope.component.getUtilitiesFor(self.interface, context)
      File
"/home/clueck/.buildout-eggs/zope.component-3.5.1-py2.4.egg/zope/component/_api.py",
line
 212, in getUtilitiesFor
        return getSiteManager(context).getUtilitiesFor(interface)
      File
"/home/clueck/.buildout-eggs/zope.component-3.5.1-py2.4.egg/zope/component/_api.py",
line
 51, in getSiteManager
        raise ComponentLookupError(*error.args)
    ComponentLookupError: ('Could not adapt',
<quotationtool.categorization.categorizableitemdescrip
tion.CategorizableItemDescription object at 0xb71b556c>, <InterfaceClass
zope.component.interfaces.I
ComponentLookup>)


An adapter seems to be missing. That adapter--I guess--adapts to *
Which component should I register?

Regards,
Christian