SilverUnit

• Download: Examples of tests using SilverUnit at: http://download.typemock.com/SilverUnitExamples.604.zip
• Getting a SilverUnit project up and running
• SilverUnit sits on top of Typemock Isolator's Open-AOP hooks. (Isolator is a commercial unit testing tool).
• see also: Understanding the SilverUnit source code
• see also: What is CThru: http://cthru.codeplex.com

• Tests can be run with the regular NUnit or MS Test tools. No need for specialized Silverlight-based compilation.
• Objects under test can still be part of a Silverlight Assembly (in the examples, these are the Silverlight Toolkit Controls)
• We simply "new" up objects under test. But the tests can be run in the regular CLR runtime, not in silverlight.
• Tests do not run in the browser - they are fully in memory
• Tests do no invoke the silverlight runtime, due to the use of the "SilverlightUnitTest" attribute

In C#

 [Test,SilverlightUnitTest]
 public void SetProperty()
 {
            var box = new AutoCompleteBox();
            box.MinimumPrefixLength = -3;
            int length =  (int) box.MinimumPrefixLength;
            Assert.AreEqual(-1, length);
  }


[Test,SilverlightUnitTest]
public void SetChildTemplate()
{

   //arrange
   var box = new AutoCompleteBox();

    //injecting our child controls into the parent control without needing XAML
    SilverUnit.SetTemplateChild(box, "Text", new TextBox());
    SilverUnit.SetTemplateChild(box, "Popup", new Popup()); 
    SilverUnit.SetTemplateChild(box, "SelectionAdapter", new ListBox());
    SilverUnit.SetTemplateChild(box, "DropDownToggle", new ToggleButton());

     //act
     box.OnApplyTemplate(); //full control of when to call OnApplyTemplate


      //assert      
      SilverUnit.Assert.VisualStatedWasChangedTo("Normal",box,false);   //special SilverUnit Assert to check moving to a Visual State
        }

In VB.NET

   //it's easy to trigger control events on any control using special extension methods
 <SilverlightUnitTest(), Test()> _
    Public Sub SetTextBox_SetTextOnTextBox_ACBoxIsUpdated()
        Dim txt As TextBox = New TextBox()
        Dim box As AutoCompleteBox = New AutoCompleteBox()
        txt.SelectionStart = 0
        txt.SelectionLength = 0
        txt.IsEnabled = True
        txt.Focus()

        box.TextBox = txt
        txt.Text = "a"
        txt.FireEvent(Events.TextChanged, Me, FakeInstance(Of TextChangedEventArgs))    //here we also are able to send in fake event args

        Assert.AreEqual("a", box.Text)
        Assert.AreEqual(box.Text, txt.Text)

    End Sub