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I am testing for whether elements on the page such as //img or //i have an alt attribute.
I can't find a way to detect when the attribute does not exist at all.
Here's the WebElement. Just an img with no alt attribute.
<img class="gsc-branding-img" src="https://www.google.com/cse/static/images/1x/googlelogo_grey_46x15dp.png" srcset="https://www.google.com/cse/static/images/2x/googlelogo_grey_46x15dp.png 2x"/>
Here's my code trying to determine the alt's existence. I know it's not all necessary, I was just trying everything.
WebElement we == driver.findElement(By.xpath("(//img)[1]"));
String altAttribute = we.getAttribute("alt");
if(altAttribute == null || altAttribute =="" || altAttribute == " ")
{
//attribute not found
}
It seems like it is returning an empty string... For example, the following code returns "beforeAfter"
System.out.println("before"+altAttribute+"After");
However, my if statement does not catch the return, so I don't know what to do.
818
asked Jun 30 '17 13:06
if the attribute is not present, it should return null, if it's present and not set then it will return empty string. I think that's the case in your example, if so. Then you should use equal method to compare string rather than == operator.
Below example is about google search box, xxx attribute is not present for search box and so it will return null
driver = new ChromeDriver();
driver.get("http://google.com");
WebElement ele = driver.findElement(By.name("q"));
String attr = ele.getAttribute("xxx");
if (attr == null){
System.out.print("Attribute does not exist");
}
else if (attr.equals("")){
System.out.print("Attribute is empty string");
}
You can try it out yourself by writing the following html and saving it as test. html:
<html>
<head>
</head>
<body>
<p id="one">one</p>
<p id="two" data-se="">two</p>
<p id="three" data-se="something">three</p>
</body>
</html>
Then write a web driver script that looks like this:
driver.get("file:///<PATH_TO_HTML_ABOVE>/test.html");
WebElement one = driver.findElement(By.id("one"));
WebElement two = driver.findElement(By.id("two"));
WebElement three = driver.findElement(By.id("three"));
System.out.println("Does one have the data-se attribute?: '" + one.getAttribute("data-se") + "'");
System.out.println("Does two have the data-se attribute?: '" + two.getAttribute("data-se") + "'");
System.out.println("Does three have the data-se attribute?: '" + three.getAttribute("data-se") + "'");
Which will give you the following output:
Does one have the data-se attribute?: 'null'
Does two have the data-se attribute?: ''
Does three have the data-se attribute?: 'something'
Instead of checking the attribute, you should list the elements with the missing attribute with a selector:
List<WebElement> elems = driver.findElements(By.cssSelector("img:not([alt])"));
if (elems.size() > 0) {
// found images with alt attribute missing
}
I think you need to handle the null value first.
if(null == we.getAttribute("alt")){ }
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