### Question:
DingTalkUtils { public static CloseableHttpClient getDefaultClient() { return HttpClients.createDefault(); }  static String sendDingTalkMsg(String msg, String charset); static HttpPost constructHttpPost(String msg, String charset); static CloseableHttpClient getProxyClient(); static CloseableHttpClient getDefaultClient(); static RequestConfig getProxyConfig(); static String textToJsonString(String text); static final Logger logger; static final boolean isEnableDingTalk; }### Answer:
@Test public void testCreateDefaultClient() { CloseableHttpClient client = DingTalkUtils.getDefaultClient();; try { Assert.assertNotNull(client); client.close(); } catch (IOException ex) { logger.info("close exception",ex.getMessage()); new Throwable(); } }