Executing a function in C# using JavaScript

Currently, I am utilizing selenium's RemoteWebDriver along with c#. At the moment, I am inserting a javascript function into the head of a page that has the following structure:

"window.__webdriver_javascript_errors = [];
                window.onerror = function(errorMsg, url, line) {
                window.__webdriver_javascript_errors.push(
                    errorMsg + ' (found at ' + url + ', line ' + line + ')');
                };";

This script is inserted using the fiddler proxy and it captures any javascript errors on the page, storing them in an array. Later, I rely on IJavascriptExecuter to extract this data.

However, my goal now is to have the javascript function automatically trigger a c# method whenever it encounters an error, allowing me to log it immediately. Is this possible?

c#javascriptseleniumremotewebdriver

Answer №1

Due to WebDriver operating independently from the browser process, any injected JavaScript will not be aware of the language used in the automating process. This intentional disconnection means you must find ways to handle errors either by logging them on the server side or by actively polling for errors within the page.

To simplify this process and make it more transparent in your code, consider utilizing the EventFiringWebDriver available in the WebDriver.Support.dll assembly. This implementation wraps many WebDriver API calls and allows you to add event handlers before or after a method call. By placing your JavaScript log checks in these event handlers, it seamlessly integrates with your test code. If the current implementation does not suit your needs, refer to this template to create a custom implementation that fits your requirements.

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