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+1 vote

I'm trying to mock a generic class such that the constructor only assigns one of the generic properties, as follows:

using System;

using TypeMock;
using TypeMock.ArrangeActAssert;

namespace RD.MobileClient.Core.BDDTests
    class GenericClass<T>
        public T Foo { get; private set; }

        public Object Bar { get; private set; }

        public GenericClass(T foo, Object bar)
            this.Foo = foo;
            this.Bar = bar;
    class Test
        public Test()
            // Also tried with Members.CallOriginal and Members.MustBeSpecified. Same problem.
            GenericClass<string> fake_generic_class = Isolate.Fake.AllInstances<GenericClass<string>>(Members.ReturnRecursiveFakes, ConstructorWillBe.Ignored);
            MockManager.GetMockOf(fake_generic_class).MethodSettings(".ctor").MockMethodCalled += (sender, args) =>
                GenericClass<string> inst = (GenericClass<string>) sender;

                // Exception throws by the following line
                ObjectState.SetField(inst, "Foo", (string) args.SentArguments[0]);

            GenericClass<string> test = new GenericClass<string>("testing", null);

But I get a exception saying "Field 'Foo' could not be found in type: GenericClass`1, did you mean to mock the property? As a property is a method, use mocking API instead".

asked by Ash (1.6k points)

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