Question

I want to run tests that change the user-agent in the http request sent from the browser (like the FF add-on, user agent switcher does). I saw you can do it by playing with the FF profile (http://seleniumhq.org/docs/09_webdriver.html).

Is there a way to do it within a test? Something like the function addCustomRequestHeader() that sets a header rather than adding it

Answer 1

You could insert a function like this to change the user agent on the fly before you make your http request:

function changeuserAgent() {

    var altuserAgentGetter = function () {
        return "Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2) Gecko/20100115 <choose your string>";
    };

    if (Object.defineProperty) {
        Object.defineProperty(navigator, "userAgent", {
            get: altuserAgentGetter
        });
    }
    else if (Object.prototype.__defineGetter__) {
        navigator.__defineGetter__("userAgent", altuserAgentGetter);
    } 
}