Locating child nodes of WebElements in selenium

Question

I am using selenium to test my web application and I can successfully find tags using By.xpath. However now and then I need to find child nodes within that node.

Example:

<div id="a">     <div>         <span />         <input />     </div> </div> 

I can do:

WebElement divA = driver.findElement( By.xpath( "//div[@id='a']" ) ) 

But now I need to find the input, so I could do:

driver.findElement( By.xpath( "//div[@id='a']//input" ) ) 

However, at that point in code I only have divA, not its xpath anymore... I would like to do something like this:

WebElement input = driver.findElement( divA, By.xpath( "//input" ) ); 

But such a function does not exist. Can I do this anyhow?

BTW: Sometimes I need to find a <div> that has a certain decendent node. How can I ask in xpath for "the <div> that contains a <span> with the text 'hello world'"?

Answer 1

According to JavaDocs, you can do this:

WebElement input = divA.findElement(By.xpath(".//input")); 

---

How can I ask in xpath for "the div-tag that contains a span with the text 'hello world'"?

WebElement elem = driver.findElement(By.xpath("//div[span[text()='hello world']]")); 

The XPath spec is a suprisingly good read on this.