    @Test
    public void test_download_fail() {

        HttpClientDownloader httpClientDownloader = new HttpClientDownloader();
        Task task = Site.me().setDomain("localhost").setCycleRetryTimes(5).toTask();
        Request request = new Request(PAGE_ALWAYS_NOT_EXISTS);
        Page page = httpClientDownloader.download(request, task);
        assertThat(page.isDownloadSuccess()).isFalse();
    }