1. Timmy Kokke
Silverlight / ASP.Net Developer
UNIT4 Internet Solutions
Expression Blend MVP

2. Basics of MVVM
Unit Testing
Silverlight Unit Testing framework
StatLight

3. Model
View
ViewModel

4. Model
View
ViewModel

5. Model
View
ViewModel

6. Model
View
ViewModel

7. Model
View
ViewModel
Databinding
Commands
Methods
Events

8. Unit tests are
consistent, isolated, fast and repeatable

9. Test only small units of work
TestName = Requirement
1 Assert per test
Self explanatory
Readability over Maintainability

10. Silverlight Toolkit
http://silverlight.codeplex.com
Runs in browser, no support for MsTest

12. [TestClass]
public class ExampleTests{
[TestMethod]
public class Adding_1_And_1_Should_Be_2(){
int result = 1 + 1;
Assert.AreEqual(2, result);
}
}

13. ServerSilverlightClient
GamesViewModel
GamesView
GamesDataService
WCF Ria Service
Database

15. UnitTest
ServerSilverlightClient
GamesViewModel
GamesView
GamesDataService
WCF Ria Service
Database
TestGamesDataService
IGamesDataService
GamesViewModelTests

17. [TestMethod]
[Tag("Rating")]
public void Setting_Ratings_Should_Set_AverageRating()
{
Rating rating = new Rating();
rating.GameplayRating = 4;
rating.GraphicsRating = 2;
Assert.AreEqual(3, rating.AverageRating);
}

18. [TestMethod]
[Description("Testing implementation of IDataErrorInfo."+
"Empty String Name should return Error.")]
public void Getting_ErrorInfo_For_Empty_Name_Should_Return_Error()
{
Rating errorInfo = new Rating {Name = string.Empty};
string result = errorInfo["Name"];
Assert.IsFalse(string.IsNullOrWhiteSpace(result));
}

19. [TestMethod]
[Asynchronous]
public void Executing_InitializeCommand_Should_Get_Publishers()
{
PublishersViewModel viewModel = new PublishersViewModel(
new TestPublishersDataService());
viewModel.PropertyChanged += (s, a) =>
{
Assert.IsTrue(viewModel.Publishers != null);
EnqueueTestComplete();
};
viewModel.InitializeCommand.Execute(null);
}

20. [TestMethod]
[Bug("Submitting is not implemented at this moment.")]
[WorkItem(1543)]
[Asynchronous]
public void Executing_SubmitCommand_Should_Navigate_To_GamesList()
{
DecoupledEventAggregator.GetInstance()
.GetEvent<NavigateToEvent>().Subscribe((a) =>
{
Assert.IsTrue(true);
EnqueueTestComplete();
});
RatingViewModel viewModel =
new RatingViewModel(new TestGamesDataService());
viewModel.SubmitCommand.Execute(null);
}

21. [TestMethod]
[Asynchronous]
[Timeout(250)]
public void Executing_GetMoreCommand_Should_Respond_In_250ms()
{
PublishersViewModel viewModel =
new PublishersViewModel(new TestPublishersDataService());
viewModel.PropertyChanged += (s, a) =>
{
Assert.IsTrue(true);
EnqueueTestComplete();
};
viewModel.GetMoreCommand.Execute(null);
}

22. [TestMethod]
[ExpectedException(typeof(ArgumentNullException))]
public void Executing_SubmitCommand_With_Null_Should_Throw_Exception()
{
RatingViewModel viewModel =
new RatingViewModel(new TestGamesDataService());
viewModel.SubmitCommand.Execute(null);
}

23. Command line tool
http://statlight.codeplex.com
Possible to integrate in TFS build
Continuous mode

25. http://silverlight.codeplex.com
http://statlight.codeplex.com
Timmy Kokke
info@timmykokke.com
http://twitter.com/sorskoot
http://www.timmykokke.com
Silverlight and Expression Usergroup
http://www.sixin.nl
9 November next meeting !