Selenium Webdriver执行由于javascript等待条件而被卡住 [英] Selenium webdriver execution gets stuck due to a javascript wait condition

问题描述

我一直在使用Java脚本等待条件来等待页面加载，而我的代码如下:

I have been using a java-script wait condition to wait for page load and my code is like this:

public void untilPageIsLoaded() {
        ExpectedCondition<Boolean> condition = new ExpectedCondition<Boolean>() {
            public Boolean apply(WebDriver driver) {
                return ((JavascriptExecutor) driver).executeScript("return document.readyState").equals("complete");
            }
        };
        WebDriverWait wait = new WebDriverWait(driver, timeout);
        wait.until(condition);
    }

最初，此代码运行良好，但几天后，我的测试开始陷入随机点.因此，我调查了这个问题，发现罪魁祸首是在Java-script等待条件之上，该条件会停止执行.

Initially this code was working very well but few days later my tests started getting stuck at random points. So I investigated the issue and came to know that the culprit is above java-script wait condition which stops execution.

即使我没有遇到任何异常，它也永远不会超时.我知道这很奇怪，但这不仅在我身上，在这里看看.

Even I was not getting any exception and it never timeout.I know this is very strange but this is not only with me, have a look here;

https://code.google.com/p/selenium/issues/detail?id = 6955

我尝试了硒和浏览器的升级/降级版本，更改了系统配置，但没有一个起作用.

I tried with Upgraded/downgraded version of selenium and browser,changed system configuration but none of them worked.

现在我想用其他代码替换上面的java-script等待条件.我不想使用thread.sleep();

Now I want to replace above java-script wait condition with some other code.I don't want to use thread.sleep();

请给我推荐一些好东西.

Please suggest me something good.

推荐答案

在文档准备就绪之前，此代码将永远不会执行.

This code would never execute until the document is already ready anyway.

因此，无需从硒中执行此JS-因为它只能返回一个结果-完成".

So there is no need to execute this JS from selenium - because it can only ever return one result - "complete."

这是因为只有在页面上才能从SE执行JS.进入页面的唯一方法是调用Selenium的.get()，它会阻止所有后续执行，直到DOM完全加载为止.所以.get()已经在做您的.untilPageIsLoaded()否则会做的事情.

This is because you can't execute JS from SE until you are on a page. The only way to get on a page is to call Selenium's .get(), which blocks any following execution until the DOM is fully loaded. So .get() is already doing what your .untilPageIsLoaded() would otherwise do.

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