def METHOD_NAME(self):
    # A content object called 'index_html' wins
    self.folder.invokeFactory("Document", "d1", title="Doc 1")
    self.folder.setDefaultPage("d1")
    self.folder.invokeFactory("Document", "index_html", title="Doc 2")
    from plone.base.defaultpage import get_default_page
    self.assertEqual("index_html", get_default_page(self.folder))