using javascript in selenium javascript executor

Question

I want to verify if my required text is appearing on page. i cant use selenium webdriver's gettext() method as its throwing permission exception. so i am using javascript to compare the text.

 String scriptToExec = "var result = document.getElementsByClassName('Sender');
    for(var element in result){
    if (element.text.contains('mytext'))
    {return true;}
    else
    {return false;}}";          

    JavascriptExecutor js = (JavascriptExecutor) driver;
    Boolean result = (Boolean) (js.executeScript(scriptToExec));

I am getting this exception: org.openqa.selenium.remote.

ErrorHandler $UnknownServerException: element.text is undefined

Please give the code and the related stacktrace when you tried the gettext() method. It is supposed to work. — Algiz
– Algiz, Commented Jun 27, 2014 at 12:32
Cant paste the entire stack trace: Driver info: org.openqa.selenium.remote.RemoteWebDriver Capabilities [{platform=XP, javascriptEnabled=true, acceptSslCerts=true, browserName=firefox, rotatable=false, locationContextEnabled=true, webdriver.remote.sessionid=83461874-001e-486f-88a3-5fd82fe125ad, version=26.0, databaseEnabled=true, cssSelectorsEnabled=true, handlesAlerts=true, browserConnectionEnabled=true, webStorageEnabled=true, nativeEvents=false, applicationCacheEnabled=true, takesScreenshot=true}] — webtester
– webtester, Commented Jun 27, 2014 at 12:56

Arran · Accepted Answer · 2014-06-27 15:41:16Z

1

Many JavaScript issues here as well as a severe lack of understanding about selectors. contains isn't part of the standard and won't work with older browsers:

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/contains

If there is element.text is undefined for whatever reason, you'll need to cope with that:

if (element && element.text && element.text.contains('mytext'))

(meaning, if "element" is something and element.text is something and if element.text contains 'mytext')

Also, I can see you are basically trying to do a contains search on some text - you absolutely do not need JavaScript for this. It can be done using an XPath selector!

answered Jun 27, 2014 at 15:41

Arran

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2 Comments

webtester Over a year ago

The contains method is giving me the proper result when executed on firebug console with same browser. Regarding xpath selector i have mentioned that i am getting a permission related error and that's the reason for using javascript. It seems to me as a syntax related issue. still trying to figure it out.

Arran Over a year ago

Of course Firebug will allow you to do it, it's an addon. You should be working towards fixing the permissions error and not working around it. It's likely it'll keep appearing as you progress through with these automated tests, and so you will just be working against the API and basically just using native JS all the time. Fix the issue!

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