NightwatchJS未传递变量

Question

出于作用域的目的，我已经分隔了变量，我可以用url1中的各个DOM元素填充所有变量，但是当我试图将它们传递给url2字段时，它们被设置为undefined，就像从未设置过变量一样。然而，console.log可以工作。我也向.setValue('#address-serviceability-form', '', '', function(e){ // set the value here})传递了一个函数，但是我仍然没有定义...这是变量作用域问题吗？

describe('Ecosia.org Demo', function() {
  var address ='';
  var streetNumber = '';
  var city = '';
  var stateAndZip = '';
  var state = ''
  var zip = '';

before(browser => browser.url('url1.com'));

test('Extract random address', function (browser) {

browser
  .getText('.rand_large li:first-child', function(result) {
    address = result.value.split("\n");
    streetNumber = address[0];
    console.log('streetNumber', streetNumber) //this works and logs correctly
    city = address[1].split(",")[0];
    stateAndZip = address[1].split(",")[1];
    state = stateAndZip.split(" ")[1];
    zip = stateAndZip.split(" ")[2];

  })
  .url('url2.com')
  .waitForElementVisible('form')
  .setValue('#address-serviceability-form', streetNumber) // this is set to undefined
  .pause(5000)
 });

 after(browser => browser.end());
});

Answer 1

在我看来，这是您对NodeJS回调的理解的一个问题。

您应该能够使用async/await修复此问题。您的代码没有等待回调解析，并且在set value函数中使用之前没有赋值。你可以尝试下面这样的方法。

​

test('Extract random address', async function(browser) {

  await browser
    .getText('.rand_large li:first-child', function(result) {
      address = result.value.split("\n");
      streetNumber = address[0];
      console.log('streetNumber', streetNumber) //this works and logs correctly
      city = address[1].split(",")[0];
      stateAndZip = address[1].split(",")[1];
      state = stateAndZip.split(" ")[1];
      zip = stateAndZip.split(" ")[2];

    })
  browser.url('url2.com')
    .waitForElementVisible('form')
    .setValue('#address-serviceability-form', streetNumber) // this is set to undefined
    .pause(5000)
});

​