找出Selenium未成功加载的资源

时间：2016-07-20 09:15:11

标签： javascript java selenium selenium-webdriver integration-testing

我必须使用Selenium测试应用程序。该应用程序包含广告等外部内容。在我的测试中，我有几次等待文档加载。这看起来像这样：

private static final String DOCUMENT_READY_STATE_COMPLETE = "complete";

protected void waitUntilDocumentLoaded() {
    wait.until(input -> getDocumentReadyState().equals(DOCUMENT_READY_STATE_COMPLETE));
}

private String getDocumentReadyState() {
    return ((JavascriptExecutor) driver).executeScript("return document.readyState").toString();
}

有时，浏览器仍在加载某些资源。据我所知，如果readyState 互动 而不是 完整 ，我有时可以接受。例如，如果某些广告没有及时加载，我的测试就完全没有意义了。

是否有可能以某种方式获取尚未加载的URL的资源列表？然后我可以构建一个断言，检查哪些资源对于测试是必需的，哪些是不

我在Linux下使用Selenium Java WebDriver 2.53.1和Firefox 46。

3 个答案:

答案 0 :(得分：2)

我可以分享3种可以检查元素是否存在的方法。希望通过使用这种方法，你可以得到平息。

方法＃1：

[DateTime]$req.ServicePoint.Certificate.GetExpirationDateString()

方法2：

/**
 * Checks if is element present or not.
 * 
 * @param element
 * @return true, if is element present, otherwise return false.
 * @throws Exception
 */
public boolean isElementPresent(WebElement element) throws Exception {
    try {
        waitForElement(element, Integer.valueOf(PropertyLoader
                .loadProperty("implicit_timeout_second")));
        return true;
    } catch (NoSuchElementException e) {
        return false;
    }
}

方法3：

/**
 * waits for element to be present.
 * 
 * @param element
 * @param timeOut
 *            The timeout in seconds when an expectation is called
 * @return
 */
public WebElement waitForElement(WebElement element, int timeOut) {
    WebDriverWait wait = new WebDriverWait(driverW, timeOut);
    wait.until(ExpectedConditions.elementToBeClickable(element));
    return element;
}

答案 1 :(得分：1)

  1. 等待特定元素出现
  2. 一种解决方法是使用browsermob代理或smthn类似，在browsermob的情况下，有一种方法可以让你等待网络流量停止并等待一定的时间来确保浏览器没有额外的电话。

答案 2 :(得分：1)

所以这就是我自己编造的。这可以检测未加载的图像。我使用了非常酷的网络服务http://www.deelay.me和https://placekitten.com。所以至少对于图像我有一些东西。

<html>
<body>
<img src="http://deelay.me/1000/https://placekitten.com/g/500/500"/>
<img src="http://deelay.me/10000/https://placekitten.com/g/500/501"/>
<script>
function isImageOk(img) {
    //Function taken from http://stackoverflow.com/a/1977898/337621

    // During the onload event, IE correctly identifies any images that
    // weren’t downloaded as not complete. Others should too. Gecko-based
    // browsers act like NS4 in that they report this incorrectly.
    if (!img.complete) {
        return false;
    }

    // However, they do have two very useful properties: naturalWidth and
    // naturalHeight. These give the true size of the image. If it failed
    // to load, either of these should be zero.

    if (typeof img.naturalWidth !== "undefined" && img.naturalWidth === 0) {
        return false;
    }

    // No other way of checking: assume it’s ok.
    return true;
}


function checkState(){
    var documentState = document.readyState;
    if ( documentState != "complete") {
        console.log("Document is still having readystate " + documentState + ". Pending images: " );
        var images = document.getElementsByTagName("img");
        for(i = 0;i < images.length; i++)
        {
            if ( !isImageOk( images[i] ) ) {
                console.log("Image URL: " + images[i].src );
            }
        }
        setTimeout(checkState,500);
    }
    else {
        console.log("Document is loaded successfully.");
    }
}

checkState();

</script>
</body>
</html>

控制台输出：

Document is still having readystate loading. Pending images: 
Image URL: http://deelay.me/1000/https://placekitten.com/g/500/500
Image URL: http://deelay.me/10000/https://placekitten.com/g/500/501
Document is still having readystate interactive. Pending images: 
Image URL: http://deelay.me/1000/https://placekitten.com/g/500/500
Image URL: http://deelay.me/10000/https://placekitten.com/g/500/501
Document is still having readystate interactive. Pending images: 
Image URL: http://deelay.me/1000/https://placekitten.com/g/500/500
Image URL: http://deelay.me/10000/https://placekitten.com/g/500/501
Document is still having readystate interactive. Pending images: 
Image URL: http://deelay.me/1000/https://placekitten.com/g/500/500
Image URL: http://deelay.me/10000/https://placekitten.com/g/500/501
Document is still having readystate interactive. Pending images: 
Image URL: http://deelay.me/1000/https://placekitten.com/g/500/500
Image URL: http://deelay.me/10000/https://placekitten.com/g/500/501
Document is still having readystate interactive. Pending images: 
Image URL: http://deelay.me/1000/https://placekitten.com/g/500/500
Image URL: http://deelay.me/10000/https://placekitten.com/g/500/501
Document is still having readystate interactive. Pending images: 
Image URL: http://deelay.me/10000/https://placekitten.com/g/500/501
Document is still having readystate interactive. Pending images: 
Image URL: http://deelay.me/10000/https://placekitten.com/g/500/501
Document is still having readystate interactive. Pending images: 
Image URL: http://deelay.me/10000/https://placekitten.com/g/500/501
Document is still having readystate interactive. Pending images: 
Image URL: http://deelay.me/10000/https://placekitten.com/g/500/501
Document is still having readystate interactive. Pending images: 
Image URL: http://deelay.me/10000/https://placekitten.com/g/500/501
Document is still having readystate interactive. Pending images: 
Image URL: http://deelay.me/10000/https://placekitten.com/g/500/501
Document is still having readystate interactive. Pending images: 
Image URL: http://deelay.me/10000/https://placekitten.com/g/500/501
Document is still having readystate interactive. Pending images: 
Image URL: http://deelay.me/10000/https://placekitten.com/g/500/501
Document is still having readystate interactive. Pending images: 
Image URL: http://deelay.me/10000/https://placekitten.com/g/500/501
Document is still having readystate interactive. Pending images: 
Image URL: http://deelay.me/10000/https://placekitten.com/g/500/501
Document is still having readystate interactive. Pending images: 
Image URL: http://deelay.me/10000/https://placekitten.com/g/500/501
Document is still having readystate interactive. Pending images: 
Image URL: http://deelay.me/10000/https://placekitten.com/g/500/501
Document is still having readystate interactive. Pending images: 
Image URL: http://deelay.me/10000/https://placekitten.com/g/500/501
Document is still having readystate interactive. Pending images: 
Image URL: http://deelay.me/10000/https://placekitten.com/g/500/501
Document is still having readystate interactive. Pending images: 
Image URL: http://deelay.me/10000/https://placekitten.com/g/500/501
Document is still having readystate interactive. Pending images: 
Image URL: http://deelay.me/10000/https://placekitten.com/g/500/501
Document is still having readystate interactive. Pending images: 
Image URL: http://deelay.me/10000/https://placekitten.com/g/500/501
Document is still having readystate interactive. Pending images: 
Image URL: http://deelay.me/10000/https://placekitten.com/g/500/501
Document is loaded successfully.
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