Selenium WebDriver By.xpath 始终无法正常工作答案

【问题标题】：Selenium WebDriver By.xpath doesn't work all the timeSelenium WebDriver By.xpath 始终无法正常工作
【发布时间】：2012-10-26 17:15:07
【问题描述】：

信息：

我从配置文件中得到fieldXpath，它是"//input[@id='signin_password']"

HTML：

<li><input type="password" name="signin[password]" id="signin_password" /></li>

有效：（但并非总是如此）

抓住机会……

public void doAction(WebDriver driver) throws TestException {
        try {
             WebElement el = driver.findElement(By.xpath(fieldXpath));
             el.clear();
             el.sendKeys(fieldValue);
         } catch (Exception e) {
            throw new TestException(this.getClass().getSimpleName() + ": problem while doing action : " + toString());
         }
    }

是否有使此代码与 XPath 一起工作的解决方案？

【问题讨论】：

你能分享那个元素的 HTML 代码吗？
您也可以指定正在使用的浏览器。旧版本的 IE 对 XPath 的行为不正常。没有区别，但你也可以试试 fieldXpath = //input[contains (@id,"signin_password")]

【解决方案1】：

我发现了问题...：selenium WebDriver StaleElementReferenceException

*This may be caused because the page isn't loaded completely when the code starts or changes when the code is executed. You can either try to wait a little longer for the element or catch the StaleReferenceException and try again finding the div and the span.*

我的代码：（在每个字段之前调用这些函数）

/**
 * Handle StaleElementReferenceException
 * @param elementXpath
 * @param timeToWaitInSec
 */
public void staleElementHandleByXpath(String elementXpath, int timeToWaitInSec) {
    int count = 0;
    while (count < 10) {
        try {
            WebElement slipperyElement = driver.findElement(By.xpath(elementXpath));
            if (slipperyElement.isDisplayed()) {
                slipperyElement.click(); // may throw StaleElementReferenceException
            }
            count = count + 10;
         } catch (StaleElementReferenceException e) {
            count = count + 1; // try again
         } catch (ElementNotVisibleException e) {
             count = count + 10; // get out
         } catch (Exception e) {
             count = count + 10; // get out
         } finally {
            // wait X sec before doing the action
            driver.manage().timeouts().implicitlyWait(timeToWaitInSec, TimeUnit.SECONDS);
        }
    }
}

/**
 * Wait till the document is really ready
 * @param js
 * @param timeToWaitInSec
 */
public void waiTillDocumentReadyStateComplete(JavascriptExecutor js, int timeToWaitInSec) {
    Boolean ready = false;
    int count = 0;
    while (!ready && count < 10) {
        ready =  (Boolean) js.executeScript("return document.readyState == 'complete';");
        // wait X sec before doing the action
        driver.manage().timeouts().implicitlyWait(timeToWaitInSec, TimeUnit.SECONDS);
        count = count + 1;
    }
}

【讨论】：

【解决方案2】：

使用单个 ' 引号而不是 "。所以

String fieldXpath = "//input[@id='signin_password']";

【讨论】：