Catch-22 mocking silverlight view model

[Michael]

Hello,

I am trying to use JustMock on a view-model in a silverlight application.  The structure of the solution is basically as follows:

Solution
    SilverlightApp.proj
        - ViewModels
            ViewModelX.cs
        -Views
            ViewX.xaml
            
     SIlverligthApp.Tests.proj
         ViewModelXFixture.cs

         
Both projects are Silverlight Class projects with Silverlight 5.  The test project is using NUnitLite 1.0  libraries (also tried it with NUnit3.0) and has a reference to Telerik.JustMock.Silverlight.dll.  I have a license for the commercial version but have not enabled the profiler.  A sample unit test is below:

[TestFixture]
public class Class1Fixture
{
  [Test]
  public void Len_Returns_Length()
  {
    //Arrange
    var mockDummy = Mock.Create<IDummy>();
    var x = new Class1(mockDummy);

    //Act
    var result = x.Len("test");

    //Assert
    Assert.AreEqual(4, result);
  }
}

And this is what I tried testing:

public interface IDummy
{ }

public class Class1
{
  public Class1(IDummy dummy)
  { }
  public int Len(string input)
  {
    if (string.IsNullOrWhiteSpace(input))
      return 0;
    return input.Length;
  }
}

But this is the error I get:

Tests1.Class1Fixture.Len_Returns_Length:
System.TypeInitializationException : The type initializer for 'Telerik.JustMock.Mock' threw an exception.
  ----> System.InvalidOperationException : Telerik.JustMock.Silverlight should only be used inside the Silverlight runtime. For all other runtimes reference Telerik.JustMock instead.

But since the test project is a SilverLight class library, I cannot add a reference to Telerik.JustMock.dll.

I'm sure I'm missing something but just can recognize it at the moment.  Any advice would be much appreciated.

Thanks,

Mike

[Stefan]

Hi Michael,

If you're running your tests in the full .NET framework, then JustMock expects that your unit test project will also target the full .NET framework and not Silverlight. Simply retarget your test project to the full runtime.

Telerik.JustMock.Silverlight.dll is meant to be run in the Silverlight runtime, i.e. using the Silverlight Unit Test Framework from the Silverlight Toolkit and maybe the StatLight. If  you want to run your tests in the full runtime, then you need to reference Telerik.JustMock.dll. In this case it doesn't matter to you whether your test project targets Silverlight or the full runtime and to make things work you should always target the full runtime.

I hope this helps. Do you have a particular reason to target Silverlight in the unit test project?

Regards,
Stefan
Telerik

 

 

[Michael]

Stefan,

Unfortunately, I am forced to used Silverlight test projects since the project I'm assigned to has a large number of dependencies that are Silverlight only.  Time to refactor!

Thanks for your quick reply.

Mike

[Stefan]

Hi Michael,

Unless you have regular Silverlight assemblies that reference the unit test projects themselves, you should not have a problem to reference Silverlight assemblies from full .NET assemblies and then you will have to convert only your unit test projects.

Either way, I was happy to help. :)

Regards,
Stefan
Telerik