node.js - 为什么我在使用 selenium chromedriver 时会出现此错误？

Question

当执行下面的代码时，它会打开 chrome，并且搜索栏已填充此 data;,。我没有在代码中的任何地方提到它，但这种情况仍然发生。而且，每次我尝试运行代码时都很少出现错误。

var webdriver = require('selenium-webdriver'),
    By = webdriver.By,
    until = webdriver.until;

var driver =new webdriver.Builder()
    .forBrowser('chrome')
    .build();

driver.get('http://www.google.com/ncr');
driver.findElement(By.name('q')).sendKeys('wiki');
driver.findElement(By.name('btnG')).click();
driver.wait(check_title,1000);

function check_title(){
  var promise = driver.getTitle().then((title)=>{
    if(title === 'wiki - Google Search'){
      console.log('success!');
      return true;
    }else{
      console.log("failed!!");
    }
  });
  return promise;
}

我收到此错误

 (node:15384) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): Error: ECONNREFUSED connect ECONNREFUSED 127.0.0.1:61227
    (node:15384) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
    (node:15384) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 2): Error: ECONNREFUSED connect ECONNREFUSED 127.0.0.1:61227
    (node:15384) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 4): Error: ECONNREFUSED connect ECONNREFUSED 127.0.0.1:61227
    (node:15384) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 5): Error: ECONNREFUSED connect ECONNREFUSED 127.0.0.1:61227
    (node:15384) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 6): Error: ECONNREFUSED connect ECONNREFUSED 127.0.0.1:61227

如何删除它？

Answer 1

在向搜索栏发送按键之前，使用 .clear(); 清除搜索栏的输入字段。有关它的详细信息，请参阅此问题的答案 question .

Promise 不会用 catch 来处理拒绝。遵循另一个question on promise rejection的答案.

var promise = driver.getTitle().then((title)=>{
    if(title === 'wiki - Google Search') {
      console.log('success!');
      return true;
    } else {
      console.log("failed!!");
    }
  }).catch(function () {
      console.log("Promise Rejected!");
  });