Autofixture.Automoq - generics make bool always true

Question

public interface IResult
{
    bool Success { get; } 
}

public interface IResult<T> : IResult
{

}

Using AutoFixure, and AutoMoq I am trying to find a way to to make Success always true, no matter what type T is. Registering a fake is easy enough with IResult, but that doesn't seem to work for IResult<T>

Answer 1

Using a fake implementation

public class FakeResult<T> : IResult<T> {
    public bool Success {
        get { return true; }
    }
}

along with adding a TypeRelay customization

 fixture.Customizations.Add(new TypeRelay(typeof(IResult<>), typeof(FakeResult<>)));

All calls for IResult<> will use the FakeResult<> which has its Success to return trueno matter what is the type of T.

Full example to test that the mock works as intended.

[TestClass]
public class AutoFixtureDefaultGeneric {
    [TestMethod]
    public void AutoFixture_Should_Create_Generic_With_Default() {
        // Arrange
        Fixture fixture = new Fixture();
        fixture.Customizations.Add(new TypeRelay(typeof(IResult<>), typeof(FakeResult<>)));

        //Act
        var result = fixture.Create<IResult<string>>();

        //Assert
        result.Success.Should().BeTrue();
    }
}