'Return the name of the container that caused the cascade_stop'

def test_item_is_stop_with_cascade_stop(self):

    queue = Queue()
    for item in (QueueItem.stop(u'foobar-1'), QueueItem.new(u'a'), QueueItem.new(u'b')):
        queue.put(item)
    generator = consume_queue(queue, True)
    assert (next(generator) is u'foobar-1')
