硒Chrome驱动程序的getText()方法有时会返回一个空字符串 [英] getText() method of selenium chrome driver sometimes returns an empty string

问题描述

我有一个奇怪的情况，即硒chrome驱动程序getText()方法(java)为某些元素返回一个空字符串，即使它为具有相同xpath的其他元素返回了一个非空字符串.这是页面的一部分.

I have a curious case where the selenium chrome driver getText() method (java) returns an empty string for some elements, even though it returns a non-empty string for other elements with the same xpath. Here is a bit of the page.

<div __gwt_cell="cell-gwt-uid-223" style="outline-style:none;">
<div>Text_1</div>
<div>Text_2</div>
<div>Text_3</div>
<div>Text_4</div>
<div>Text_5</div>
<div>Text_6</div>
</div>

对于每个内部标记，

可以获取getTagName()，getLocation()，isEnabled()和isDisplayed()的有效返回值.但是，getText()对于某些div返回一个空字符串.

for each of the inner tags, I can get valid return values for getTagName(), getLocation(), isEnabled(), and isDisplayed(). However, getText() returns an empty string for some of the divs.

此外，我注意到如果使用mac chrome驱动程序，则始终是getText()返回空字符串的"Text_5".如果我使用Windows chrome驱动程序，则为，它始终是getText()返回空字符串的"Text_2".如果我使用firefox驱动程序，则getText()从所有div返回期望的文本.

Further, I notice that if I use the mac chrome driver, it is consistently the ‘Text_5’ for which getText() returns an empty string. If I use the windows chrome driver, it is , it is consistently the ‘Text_2’ for which getText() returns an empty string. If I use the firefox driver, getText() returns the expected text from all the divs.

还有其他人有这个困难吗?

Has anyone else had this difficulty?

在我的代码中，我使用类似这样的内容...

In my code, I use something like this…

ArrayList<WebElement> list = (ArrayList<WebElement>) driver.findElements(By.xpath("my xPath here"));
for (WebElement e: list) System.out.println(e.getText());

如下所示，这是我正在使用的实际xPath.上面的页面摘要涉及最后两个div.

As suggested below, here is the actual xPath I am using. The page snippet above deals with the last two divs.

//*[@class='gwt-DialogBox']//tr[contains(@class,'data-grid-table-row')]//td[contains(@class,'lms-assignment-selection-wizard-cell')]/div/div

推荐答案

更新:textContent属性是更好的选择，并且在大多数浏览器中都受支持.差异将在此博客文章中详细说明: innerText vs. textContent

Update: The textContent attribute is a better option and supported across the majority of browsers. The differences are explained in detail at this blog post: innerText vs. textContent

或者，innerText属性将返回DOM中存在的元素的文本内容.

As an alternative, the innerText attribute will return the text content of an element which exists in the DOM.

element.getAttribute("innerText")

isDisplayed()方法有时会在元素没有真正隐藏但在视口之外时跳闸； getText()返回此类元素的空字符串.

The isDisplayed() method can sometimes trip over when the element is not really hidden but outside the viewport; getText() returns an empty string for such an element.

您还可以使用javascript滚动到视口，将其带入视口，如下所示:

You can also bring the element into the viewport by scrolling to it using javascript, as follows:

((JavaScriptExecutor)driver).executeScript("arguments[0].scrollIntoView(true);", element);

，然后getText()应该返回正确的值.

and then getText() should return the correct value.

关于isDisplayed()方法的详细信息可以在以下SO问题中找到:

Details on the isDisplayed() method can be found in this SO question:

Selenium WebDriver的isDisplayed()方法如何工作

这篇关于硒Chrome驱动程序的getText()方法有时会返回一个空字符串的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！