def METHOD_NAME(self):
    # 3. Else, look up the attribute default_page on the object, without
    #    acquisition in place
    # 3.2 look for a content at portal, with acquisition
    self.portal.invokeFactory("Document", "d1", title="Doc 1")
    self.folder.default_page = "d1"
    from plone.base.defaultpage import get_default_page
    # now it must acquire from portal
    self.assertEqual("d1", get_default_page(self.folder))