'Verify that a public xblock\'s container preview returns the expected HTML.'

def test_public_container_preview_html(self):

    published_unit = self.store.publish(self.vertical.location, self.user.id)
    published_child_container = self.store.get_item(self.child_container.location)
    published_child_vertical = self.store.get_item(self.child_vertical.location)
    self.validate_preview_html(published_unit, self.container_view)
    self.validate_preview_html(published_child_container, self.container_view)
    self.validate_preview_html(published_child_vertical, self.reorderable_child_view)
