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JustMock QueryableCollectionView

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Stephen asked on 09 Jun 2011, 07:56 AM

Hi All,

I was just wondering if someone could post some example code of how to Mock a QueryableCollectionView?

I have a unit test that creates a class (injects a couple of Mocked services into constructor) and in the constructor of the viewmodel (that i'm testing) it sets up a collection view. The QueryableCollectionView takes property on the mocked dataservice as input and throws an exception. Not sure what I'm doing wrong.

var dataService = Mock.Create<IHoursEntryDataService>();

Mock.Arrange(() => dataService.PayrunComments).Returns(new EntitySet<PayrunCommentDto>());

is how I do the mock, and then inside the constructor of the viewmodel is this;

_commentsCollectionView = new QueryableCollectionView(_hoursEntryDataService.PayrunComments);

Which throws null exception error when i run the unit test.
PayrunComments is not null so not sure whats up with that.

help appreciated,
thanks,
Stephen

7 Answers, 1 is accepted

answered on 09 Jun 2011, 09:24 AM

at System.ServiceModel.DomainServices.Client.EntitySet.GetEnumerator()

at System.ServiceModel.DomainServices.Client.EntitySet.System.Collections.IEnumerable.GetEnumerator()

at Telerik.Windows.Data.EnumerableExtensions.TryGetFirstElement(IEnumerable source, Object& firstElement)

at Telerik.Windows.Data.EnumerableExtensions.TryGetFirstElementType(IEnumerable source, Type& firstElementType)

at Telerik.Windows.Data.EnumerableExtensions.CastToFirstElementType(IEnumerable source)

at Telerik.Windows.Data.QueryableFactory.CreateQueryable(IEnumerable source)

at Telerik.Windows.Data.QueryableCollectionView.InitializeQueryableSourceCollection()

at Telerik.Windows.Data.QueryableCollectionView..ctor(IEnumerable sourceCollection)

at PayrollSiteDataEntry.Client.ViewModels.HoursEntryViewModel.SetupCommentsCollectionView()

at PayrollSiteDataEntry.Client.ViewModels.HoursEntryViewModel..ctor(ISession session, IHoursEntryDataService hoursEntryDataService, INavigationService navigationService, IPopupActivator popupActivator)

at Client.UnitTests.HoursEntryViewModelTests.HoursEntryViewModel_Construction_IsNotNull()

Its a silverlight unit test. It gives me the above stack trace.

cheers,
Stephen

answered on 09 Jun 2011, 09:37 AM

// Arrange

var dataService = Mock.Create<IHoursEntryDataService>();

var session = Mock.Create<ISession>();

var popupActivator = Mock.Create<IPopupActivator>();

var navigationService = Mock.Create<INavigationService>();

Mock.Arrange(() => dataService.PayrunComments).Returns(new EntitySet<PayrunCommentDto>());

// Act

var viewModel = new HoursEntryViewModel(session, dataService, navigationService, popupActivator);

Assert.IsNotNull(viewModel);

Thats my unit test. As you can see I've got a Dataservice (IHoursEntryDataService) which I'm mocking.
Is there perhaps something else on the dataservice that I need to Arrange?
I'm new at mocking and finding examples of mocking RIA Services has been difficult to find.

cheers,
Stephen