Selenium Webdriver:未显示正确的Li元素 [英] Selenium Webdriver : not displaying the correct Li elements

问题描述

在下面的代码中，我希望看到的大小为18，但显示为0.我无法弄清楚为什么.

In the code below , I am expecting to see the size as 18 but it displays 0. I have not been able to figure out why.

我要去 Amazon 搜索书籍，最终希望将书籍标题存储在一个数组中.谢谢！

I am going to Amazon searching for books and ultimately want to store the book titles in a array. Thanks !

@Test
public void searchTestOne(){
    System.setProperty("webdriver.gecko.driver", "C:\\geckodriver\\geckodriver.exe");
    WebDriver driver = new FirefoxDriver();
    driver.get("http://www.amazon.in");
    driver.manage().window().maximize();        

    driver.findElement(By.id("twotabsearchtextbox")).sendKeys("Books");
    driver.findElement(By.className("nav-input")).click();

    List<WebElement> result = driver.findElements(By.xpath(".//*[@id='atfResults']/ul[@id='s-results-list-atf']/li"));

    System.out.println(result.size());

推荐答案

页面是动态的，这意味着一旦selenium认为页面已加载，内容实际上就不在页面上了.因此，您必须首先等待结果.

The page is dynamic, meaning once selenium thinks the page is loaded, the content isn't actually on the page yet. So you have to wait for the results first.

在这种情况下，您可以等到期望得到一个以上的结果，因为列表应该一次全部加载:

In this case, You can wait until you expect more than one result since the list should all load at once:

WebDriverWait wait = new WebDriverWait(driver, timeoutInSeconds);
//Note this isn't giving you the titles, it's giving you the entire list item
By bookSearchResults = By.xpath(".//*[@id='atfResults']/ul[@id='s-results-list-atf']/li");

wait.until(ExpectedConditions.numberOfElementsToBeMoreThan(bookSearchResults, 1));

//Then continue on as you were
List<WebElement> result = driver.findElements(bookSearchResults);
....

您也可以尝试等待结果div.

You could also just try waiting for the results div instead.

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