UberSelectionWidget
===================

First we need to prepare some things. For this we need some imports.

  >>> from zope.browser.interfaces import ITerms
  >>> from zope.component import provideAdapter, adapts
  >>> from zope.interface import Interface, implements
  >>> from zope.schema import Choice, List
  >>> from zope.schema.interfaces import IIterableSource
  >>> from plone.app.vocabularies.catalog import SearchableTextSource
  >>> from zope.publisher.interfaces.browser import IBrowserRequest
  >>> from zope.schema.vocabulary import SimpleTerm

The source itself.

  >>> class SourceList(list):
  ...     implements(IIterableSource)

An adapter to ITerms.

  >>> class ListTerms(object):
  ...
  ...     implements(ITerms)
  ...
  ...     def __init__(self, source, request):
  ...         pass # We don't actually need the source or the request :)
  ...
  ...     def getTerm(self, value):
  ...         title = unicode(value)
  ...         try:
  ...             token = title.encode('base64').strip()
  ...         except binascii.Error:
  ...             raise LookupError(token)
  ...         return SimpleTerm(value, token=token, title=title)
  ...
  ...     def getValue(self, token):
  ...         return token.decode('base64')

  >>> provideAdapter(
  ...     ListTerms,
  ...     (SourceList, IBrowserRequest))

An adapter to ISourceQueryView to make the source searchable.

  >>> from zope.formlib.interfaces import ISourceQueryView

  >>> class ListQueryView:
  ...
  ...     implements(ISourceQueryView)
  ...     adapts(
  ...         SourceList,
  ...         IBrowserRequest,
  ...         )
  ...
  ...     def __init__(self, source, request):
  ...         self.source = source
  ...         self.request = request
  ...
  ...     def render(self, name):
  ...         return (
  ...             '<input name="%s.string">\n'
  ...             '<input type="submit" name="%s" value="Search">'
  ...             % (name, name)
  ...             )
  ...
  ...     def results(self, name):
  ...         if name+".search" in self.request:
  ...             search_string = self.request.get(name+'.query')
  ...             if search_string is not None:
  ...                 return [value
  ...                         for value in self.source
  ...                         if search_string in value
  ...                         ]
  ...         return None

  >>> provideAdapter(ListQueryView)

Then we can start to test the widget.

  >>> from zope.publisher.browser import TestRequest
  >>> from plone.app.form.widgets.uberselectionwidget import UberSelectionWidget, UberMultiSelectionWidget
  >>> from xml.dom.minidom import parseString

We need a request.

  >>> request = TestRequest()

A choice field with the source.

  >>> selection = Choice(__name__='selection',
  ...                title=u'Single select',
  ...                source=SourceList(['spot', 'bowser', 'prince', 'duchess', 'lassie']))

And the widget itself.

  >>> widget = UberSelectionWidget(selection, request)

Now we can render the widget and inspect it.

  >>> dom = parseString(widget())
  >>> inputs = dom.getElementsByTagName('input')
  >>> inputs[0].getAttributeNode('name').value
  u'field.selection.query'
  >>> inputs[1].getAttributeNode('name').value
  u'field.selection.search'
  >>> dom.unlink()

Now we want to make a query and see whether we get selectable results.

  >>> request.form['field.selection.query'] = u'o'
  >>> request.form['field.selection.search'] = u'Search'
  >>> dom = parseString(widget())
  >>> inputs = [x for x in dom.getElementsByTagName('input')
  ...           if u'type="radio"' in x.toxml()]
  >>> len(inputs)
  2
  >>> u'c3BvdA==' in inputs[0].toxml()
  True
  >>> u'spot' in inputs[0].nextSibling.nextSibling.toxml()
  True
  >>> u'Ym93c2Vy' in inputs[1].toxml()
  True
  >>> u'bowser' in inputs[1].nextSibling.nextSibling.toxml()
  True
  >>> dom.unlink()

Test multiselection

  >>> from zope.schema import List
  >>> selection = List(__name__='selection',
  ...                title=u'Multi select',
  ...                value_type=Choice(
  ...                       source = SourceList(['spot', 'bowser', 'prince', 'duchess', 'lassie']))
  ...                       )

And the widget itself.

  >>> widget = UberMultiSelectionWidget(selection, request)

Widget value should always be list

  >>> widget._value()
  []
  >>> widget._getRenderValue()
  []

Fine, so far everything works!