Trying to catch the WebElementNotFoundException exception unsuccessfully

Product Forums Katalon Studio
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1

I’ve been trying to further improve the custom logging I use in my testcases. What I would like to be able to catch each exception and log it appropriately somewhere, so I can later look back at what went wrong in a few simple sentences.

try {
    TestCase.runTest()
} catch(WebElementNotFoundException e) {
    println(e.message)
} catch(StepFailedException e) {
    println(e.message)
} catch(Exception e) {
    println(e.message)
}

The TestCase.runTest() is just a collection of WebUI.callTestCase methods.

In the logs I can see there are multiple kind of exception, one of which is the WebElementNotFoundException. However the try/catch block above only catches the StepFailedException or the general Exception.

webelementnotfoundexception
webelementnotfoundexception3187×1569 380 KB

That error message about the specific selector being wrong is the one that I want to use in my custom logging.

How would I go about to achieve this result?

2

The reason your try/catch block is reporting back the StepFailedException is that it is the top-most exception. It’s then printing down the stack to the root cause, which is your WebElementNotFoundException.

If the top-level exception you got was a WebElementNotFoundException, that’s what would get caught instead of the StepFailedException.

I’m thinking the way to handle this would be something like:

1.) Catch ANY exception.
2.) Find the root exception and handle it (report it or whatever) if it matches one of the types you care about.

In Java:

try {
    // something
} catch (Exception e) {
    while(e.getCause() != null) {
        e = e.getCause();
    }
    String exceptionName = e.getClass().getSimpleName();
    if (exceptionName.equals("StepFailedException")) {
        // do something
    } else if (exceptionName.equals("WebElementNotFoundException")) {
        // do something else
    }
    // add more else ifs for exceptions you care about...
}

You could also do this iteratively down the stack by putting everything into the while loop if you wanted to handle multiple/all exceptions in the stack:

try {
    // something
} catch (Exception e) {
    while(e.getCause() != null) {
        e = e.getCause();
        String exceptionName = e.getClass().getSimpleName();
        if (exceptionName.equals("StepFailedException")) {
            // do something
        } else if (exceptionName.equals("WebElementNotFoundException")) {
            // do something else
        }
        // add more else ifs for exceptions you care about...
    }
}
1 Like
3

This is exactly what I needed! Thank you very much. I am not experienced enough with Java, so I am missing some crucial know-hows.

I used the iterative version and it worked perfectly.

The only addition I would like to make is that when you’re conditioning the exception names it expects the full class name like so: com.kms.katalon.core.webui.exception.WebElementNotFoundException

Thanks again, especially for the fast response!

4

Oh right, that will give you the package as well. You could use getSimpleName() instead, that will just give the class name.

Glad it worked for you! I will mark my answer as the solution.