Testing Kendo.UI datasource

[Dave Hayward]

I'm not sure if this is a JustMock question, but it may be. I'm trying to test a Kendo datasource 'read' method which is implemented in my MVC controller. The datasource is actually part of a grid definition, but I have others that are in auto-complete controls.

The following is a fragment of my grid definition in the view.

.DataSource(dataSource => dataSource
    .Ajax()
    .PageSize(10)
    .Events(events => events.Error("error_handler").RequestEnd("onGridRequestEnd"))
    .Model(model =>
    {
        model.Id(p => p.Id);
        model.Field(p => p.Id).Editable(false);
        model.Field(p => p.PostedStr).Editable(false);
        model.Field(p => p.UpdatedStr).Editable(false);
    })
    .Read(read => read.Action("_GetBulletins", "Bulletins").Type(HttpVerbs.Get))
    .Create(create => create.Action("_CreateBulletin", "Bulletins").Type(HttpVerbs.Post).Data("sendAntiForgery"))
    .Update(update => update.Action("_UpdateBulletin", "Bulletins").Type(HttpVerbs.Post).Data("sendAntiForgery"))
    .Destroy(update => update.Action("_DeleteBulletin", "Bulletins").Type(HttpVerbs.Post).Data("sendAntiForgery"))
)

 

My controller methods is:

[AcceptVerbs(HttpVerbs.Get)]
[AjaxOnly]
[OutputCache(NoStore = true, Duration = 0, VaryByParam = "*")]
public ActionResult _GetBulletins(DataSourceRequest request)
{
    var model = (BulletinsViewModel)ViewModels.GetModel(HttpContext, Constants.Session.Model.BulletinsViewModelId);
    var enumerableModel = model.Bulletins.AsEnumerable();
    return Json(enumerableModel.ToDataSourceResult(request), JsonRequestBehavior.AllowGet);
}

 

and a fragment of my test is:

var request = new DataSourceRequest()
{
    Aggregates = new List<AggregateDescriptor>(),
    Filters = new List<IFilterDescriptor>(),
    Groups = new List<GroupDescriptor>(),
    Sorts = new List<SortDescriptor>(),
    Page = 1,
    PageSize = 10
};

// Act
var result = controller._GetBulletins(request) as JsonResult;
var model = result.Data as BulletinsViewModel;

 

When I run my test, the controller throws and exception:

 

 

System.ArgumentNullException: 'Value cannot be null.'  Message:"Value cannot be null.\r\nParameter name: source"

Obviously I'm not setting up the 'request' properly, althought I don't exactly know what's wrong.

Rather than spin my wheels trying to figure that out, I wonder if you can advise me on the recomended approach to testing datasources.

TIA

Dave

 

 

 

[Mihail]

Hello Dave,

It is not clear from your post which value shouldn't be null. I am guessing that this is "model.Bulletins".
If this is the case the following example will show how you can mock an IEnumerable property:

IMyClass mockMyClass = Mock.Create<IMyClass>(Behavior.Strict);
mockMyClass.Arrange((item) => item.Collection).Returns(Enumerable.Repeat(1, 1));

Accessing the mockMyClass.Collection will return IEnumerable<int> where the Collection property is of the same type.

Here is a link to the documentation page of JustMock if you would like to check it.

Regards,
Mihail
Progress Telerik