How to put code into Seleno that catch js errors

[sirj77]

Hi,

Could someone help me with putting some piece of code into Seleno? I need to catch javascript errors on the Home page at least. I found a good solution - JSErrorCollector. Below you can see some implementation of this:

// create the Firefox instance
string xpiDir = ... the directory where the file JSErrorCollector.xpi is ....;
FirefoxProfile ffProfile = new FirefoxProfile();
JavaScriptError.AddExtension(ffProfile, xpiDir);
IWebDriver wd = new FirefoxDriver(ffProfile);

// run test
...

// check for javascript errors
IEnumerable<JavaScriptError> jsErrors = JavaScriptError.ReadErrors(wd).Where(err => !ShouldIgnoreJavaScriptError(err));
if (jsErrors.Count() > 0)
{
    Assert.Fail("..."); 
}

How and where in my test or settings I can put it and then use it in my tests? My test looks like this:

[Test]
        public void CanBuyProductOnline()
        {
            this.BDDfy();
        }

        public void Given_that_I_am_not_a_logged_in_user()
        {
            _homePage = Host.Instance.NavigateToInitialPage<HomePage>()
                .ProductsMenu
                .GoToMusicPageForAnonymousUser()
                .GoToProductPage()
                .AddToCartByUsingByNowButton()
                .GoToCheckoutPage();
        }

namespace Name_ofProject
{
    public static class Host
    {
        public static readonly SelenoHost Instance = new SelenoHost();
        static Host()
        {
            Instance.Run(configure => configure
                .WithWebServer(new InternetWebServer("test_url")));
        }
    }
}
...

[MehdiK]

Hi @sirj77,

You could do something like this:

namespace Name_ofProject
{
    public static class Host
    {
        public static readonly SelenoHost Instance = new SelenoHost();
        static Host()
        {
            // create the Firefox instance
            string xpiDir = ... the directory where the file JSErrorCollector.xpi is ....;
            FirefoxProfile ffProfile = new FirefoxProfile();
            JavaScriptError.AddExtension(ffProfile, xpiDir);
            IWebDriver wd = new FirefoxDriver(ffProfile);

            Instance.Run(configure => configure
                .WithWebServer(new InternetWebServer("test_url"))
                .WithRemoteWebDriver(wd));
        }
    }
}

Then use the jsErrors wherever you need to make the assertion: perhaps in one of your Then steps.