Calling WillReturnCollectionValuesOf on faked Instance that inherits from List raises ArgumentOutOfRangeException [closed]

Hi Alon,

thank you for the fast reply. I have tried to send you minimal working example (MWE) project per mail. Unfortunately, the mail got intercepted by some obscure corporate policy. As an alternative, I have posted the MWE below.

As for logs, TypeMock allows to record Mocking, SmartRunner, Test Suggestions and Sandbox logs. Considering that the log folder quickly explodes in size, which logs do you require?

MWE for reference:

I have created a UnitTest Project via VS2017 with the following dependencies:
.NET Framework 4.6.1,
TypeMock 9.0.3.0,
and MSTest 1.3.2 which was the default chosen by VS2017

using System.Collections.Generic;
using System.Linq;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using TypeMock.ArrangeActAssert;

namespace TypemockMWE
{
    [TestClass]
    public class ExampleUnitTest
    {
        [TestMethod, Isolated]
        public void TestMethod1()
        {
            // Arrange
            var replacementItems = new List<int> { 1, 2, 3, 4 };
            var yourCollection = Isolate.Fake.Instance<ObjectInheritingFromList>();
            Isolate.WhenCalled(() => yourCollection).WillReturnCollectionValuesOf(replacementItems);

            // Act
            var result = yourCollection.Select(@int => @int + 1).ToList();

            // Assert
            var expected = new List<int> { 2, 3, 4, 5 };
            CollectionAssert.AreEqual(expected, result);
        }
    }


    // This is (almost) equal to the class definition of SPFieldUserValueCollection
    public class ObjectInheritingFromList : List<int>
    {
        // Not required for the minimal working example
    }
}

Hi Mzietlow,

Thank you for the sample project, we will dig into it and try to reproduce the issue on our side.
As for the logs, for this case all we need is the Mocking logs.
You can send them to the mail I sent you.

Cheers,
Alon Sapozhnikov.
Support Specialist.