守夜人：等待没有 pass/fail 结果的元素

Question

相关问题：

wait for element present without error
Nightwatchjs: how to check if element exists without creating an error/failure/exception
Selenium WebDriver : Wait for complex page with JavaScript(JS) to load

每当我加载网页时，我都需要等待 ajax 调用完成。我目前这样做：

browser.waitForElementNotPresent(
  "cssSelector_For_HTML_afterAJAXComplete",
  10000 //timeout
);

不过，这为我的测试添加了一个额外的断言，并使报告的测试计数人为地大于必要值。

有什么想法吗？

Answer 1

好的，我一起破解了一些东西。我基本上是使用 browser.execute(function, params, callback)

将 javascript 发送到 selenium 中的控制台

  function waitForElement_NoPassFail(selector, timeout){
    browser.execute(function(selector, timeout, done){
      let intervalId;
      var p1 = new Promise(function(resolve, reject){
        intervalId = setInterval(function(){
          let itemArray = document.querySelectorAll(selector);
          if(itemArray.length == 1){
            clearInterval(intervalId);
            resolve(true); //element found
          } else if(itemArray.length>1){
            reject(false); //too many elements found, because of ambiguous selector
          }
        }, 100);
      });
      var p2 = new Promise(function(resolve, reject){
        setTimeout(reject,timeout, false); //timeout reached
      });
      return Promise.race([p1, p2]).then(function(result){
        done(result);
      });
    },
    [selector, timeout],
    function(result){
      if(!result){
        throw "Element: " + selector + " wasn't found after " + timout + " ms.";
      } else {
        console.log("Element found within timeout limits.") //doesn't trigger assert=ok
      }
    });
  };

  waitForElement_NoPassFail(
    "cssSelector_that_Is_Valid_after_AjaxIsComplete",
    10000 //timeout
  );

这可以通过多种方式扩展，例如支持 xPath。您可以在等待时使用 nightwatch 全局变量来检查元素频率。如果您需要帮助，请发表评论。

守夜人：等待没有 pass/fail 结果的元素

Nightwatch: wait for element without pass/fail result

selenium

selenium-webdriver

nightwatch.js