Silvernium ~ Selenium for Silverlight Applications

SilverLight Application Automation

Selenium Support for SilverLight Applications

The Silverlight is a relatively new client side technology released by Microsoft .To automate the Silverlight application using Selenium Open source is not possible directly. But in the open source market we can use the Silvernium component to automate the Silverlight application with the selenium RC Background
The Silvernium component

The Silvernium is a Selenium RC Client driver extension for helping exercise the tests against the Silverlight component and adding Silverlight communication capabilities to the Selenium framework.

From Silvernium Scripter (Client Side):

The Silvernium constructor takes a Selenium instance and the Silverlight object ID and the scriptable key as parameters. An instance of Silvernium is used to invoke the functions on the Silverlight application.
You can invoke functions which were externalized by the Scriptable attribute, as well as the default functions and properties of any Silverlight object(e.g, ,,background, isLoaded,ActualWidth(), etc)

Sample Program:

[sourcecode language=”csharp”]
using NUnit.Framework;
using Selenium;
using ThoughtWorks.Selenium.Silvernium;

namespace IntegrationTests
public class OurApplicationclass
private const string URL = "<Your Silverlight App URI>";
private const string OBJECTID = "";
private const string SCRIPTKEY = "";
private ISelenium selenium;
private Silvernium silvernium;

public void SetUp()
selenium = new DefaultSelenium("localhost", 4444, "*iexplore", URL);
silvernium = new Silvernium(selenium, OBJECTID, SCRIPTKEY);

public void TearDown()
public void TestCase1()
Assert.AreEqual("Application title", selenium.GetTitle());
// verifies default properties in the silverlight object
Assert.AreEqual(640, silvernium.ActualWidth());
Assert.AreEqual(460, silvernium.ActualHeight());

// verifies user defined properties and methods
Assert.AreEqual("5", silvernium.GetPropertyValue("StartingSpeed"));
// content.SilverNibbles.NewGame(‘1’);, returns null
Assert.AreEqual("null", silvernium.Call("NewGame", "1"));

// testing set and get for a user defined property
Assert.AreEqual("5", silvernium.GetPropertyValue("StartingSpeed"));
// setting the property
silvernium.SetPropertyValue("StartingSpeed", "8");
// getting it again
Assert.AreEqual("8", silvernium.GetPropertyValue("StartingSpeed"));
public void TestCase2()
//Actions to perform

From Server side – Selenium RC-Silverlight Integration

(Which is Prerequisites to execute Silvernium components)
Selenium RC uses JavaScript to communicate with the browser. Silverlight Scriptable attribute provides a mechanism to mark the Silverlight application’s classes and functions available for JavaScript calls. Therefore Silverlight-Selenium uses JavaScript as the conduit between Selenium RC and the Silverlight application. With Silverlight Scriptable attribute you can expose specific Silverlight application functions.
Scriptable attribute definition for each class and each event lets Silverlight to know that this class and these events should be accessible from the JavaScript code.

Example: This Silverlight application has three buttons, consists three events – one for each button. They’re created and used exactly like they are in an ordinary C# Windows application

[sourcecode language=”csharp”]
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Browser;

namespace SilverlightJavascript
public partial class Page : Canvas
public event EventHandler ButtonAClicked;
public event EventHandler ButtonBClicked;
public event EventHandler ButtonCClicked;

public void Page_Loaded(object o, EventArgs e)
// Required to initialize variables

WebApplication.Current.RegisterScriptableObject("SilverlightApp", this);

• The [Scriptable] attribute above the definition of the class and each event lets Silverlight know that this class and these events should be accessible from the JavaScript code.
• The RegisterScriptableObject call with this function, telling Silverlight to make this class accessible via scripts by the name “SilverlightApp”. Now whenever I want to use this object in JavaScript, I’ll reference it by the name “SilverlightApp”

With that I hope all the readers might got an idea what exactly Silvernium components comprises and its implementations:)

This is just the Implementation Concept and we really need an Silverlight application to see them working live

15 thoughts on “Silvernium ~ Selenium for Silverlight Applications

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  2. I have a question regarding Selenium and Flex automation using Selenium Webdriver. Is this possible? If yes, please let me know the steps on how to perform the same.

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  5. Hi,
    is there any way to get the same extension using Webdriver as Selenium RC is considered as deprecated?
    Many thanks in advance,

  6. Hi Manoj,

    I want to automate some Silverlight Related controls in our Application. Using Selenium in C# is it possible. Can you provide some of the examples.


  7. To implement this in Java environment , Do we need any Jar file to import , If yes please let me know…..Any Help would be appreciated.

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