Regression Testing for Zope 3 support

>>> from epydoc.test.util import runintrospecter

We treat zope interface objects as if they were classes:

>>> runintrospecter(s='''
...     from zope.interface import Interface, Attribute
...     class IExample(Interface):
...         """This interface represents a generic example."""
...
...         text = Attribute("The text of the example")
...
...         def setText(text):
...             "This method writes the passed text to the text attribute."
...
...         def getText():
...             "This method returns the value of the text attribute."
...     ''', attribs='pyval canonical_name', introspect='IExample')
ClassDoc for epydoc_test.IExample [0]
 +- canonical_name = DottedName('epydoc_test', 'IExample')
 +- pyval = <InterfaceClass epydoc_test.IExample>

(If we didn't add special support, IExample would be a GenericValueDoc.)