Calling Private generic method <T> with Private Accessor

[Sagar]

Hi,

  I am facing issue, while calling a Generic method with Private accessor. Below is my sample method which, i would like to Call.

private void PopulateCollection<T>(List<IDataItem> fromCollection, ObservableCollection<T> toCollection)

{  //some code }

 

And my Test method is as below,

[TestMethod]
public void TestPopulateCollection()
{
    var testInstance = new TestVM();
    var privateInstance = new PrivateAccessor(testInstance);

    //declare and set required parameters here for fromCollection & toCollection

    privateInstance.CallMethod("PopulateCollection", fromCollection, toCollection);

    //Assert
}

 

The above code throws exception, "Member not found". 

Is there a possible resolution for it?

 

Thank you,

Sagar

 

[Svetlozar]

Hello,

Thank you for contacting us.

Usually the member not found exception is thrown when the JustMock matcher couldn't find the member to be invoked.The matcher takes into account the actual arguments that you've passed. That works for me

  

var testInstance = new Foo();
var privateInstance = new PrivateAccessor(testInstance);
var fromCollection = new List<IDataItem>();
var toCollection = new ObservableCollection<IDataItem>();
privateInstance.CallMethod("PopulateCollection", fromCollection, toCollection);

Could you pleas send us a complete sample? It looks like our matcher can't find the member with your arguments.

//declare and set required parameters here for fromCollection & toCollection

We need your actual arguments so we can help.

Regards,
Svetlozar
Telerik

[Sagar]

Hi Svetlozar,

 Below is my test method, in which i am facing the issue. 

 

[TestMethod]
public void TestPopulateCollection()
{
           //Arrange
           var viewmodelLocator = new ViewModelLocator();
           var testVM = viewmodelLocator.TestVM;
           var privateTestVM = new PrivateAccessor(testVM);

           List<IDataItem> fromCollection = new List<IDataItem>();
           var di = Mock.Create<IDataItem>();
           Mock.Arrange(() => di.ItemKey).Returns("di1");
           fromCollection.Add(di);

           di = Mock.Create<IDataItem>();
           Mock.Arrange(() => di.ItemKey).Returns("di2");
           fromCollection.Add(di);

           ObservableCollection<TestLocationVM> toCollection = new ObservableCollection<TestLocationVM>();


           //Act
           privateTestVM.CallMethod("PopulateCollection", fromCollection, toCollection);

           //Assert
           Assert.AreEqual(2, toCollection.Count);

       }

 

Could you please help me in getting the resolution?

 

Thanks in advance,

Sagar

 

[Svetlozar]

Hello,

We would really like to help you, but we can't reproduce the issue on our side. Here is what I added to your sample code to make it a complete sample.

public class ViewModelLocator
{
    public TestLocationVM TestVM = new TestLocationVM();
}

public class TestLocationVM
{
    private void PopulateCollection<T>(List<IDataItem> fromCollection, ObservableCollection<T> toCollection) where T : new()
    {
        foreach(var i in fromCollection)
        {
            toCollection.Add(new T());
        }
    }
}

public interface IDataItem
{
    string ItemKey { get; set; }
}

I guess there is something missing in our code. Could you please prepare a simple self-contained solution that demonstrates the problem and send it over? Feel free to open a private support ticket if you don;t want the sample project to be public in the forum. 

Regards,
Svetlozar
Telerik