Description

Mocking a hierarchy with a large depth doesn't build.

Expected Behavior

Application to compile.

Actual Behavior

Application does not compile.

Steps to Reproduce

public interface IDepth1
{
    IDepth2 Inner { get; }
}

public interface IDepth2
{
    IDepth3 Inner { get; }
}

public interface IDepth3
{
    IDepth4 Inner { get; }
}

public interface IDepth4
{
    IDepth5 Inner { get; }
}

public interface IDepth5
{
}

public class Tester
{
    [Test]
    public async Task LargeHierarchy()
    {
        var mock = IDepth1.Mock();

        // If the mock type is generated then the build works
        // var mock5 = IDepth5.Mock();
    }
}

TUnit Version

1.56.0

.NET Version

.NET 10

Operating System

Windows

IDE / Test Runner

dotnet CLI (dotnet test / dotnet run)

Error Output / Stack Trace

TUnit.Mocks.SourceGenerator\TUnit.Mocks.SourceGenerator.MockGenerator\IDepth4_MockImplFactory.g.cs(19,156): error CS0400: The type or namespace name 'IDepth5MockFactory' could not be found in the global namespace (are you missing an assembly reference?)

Additional Context

I didn't debug to confirm, but this might be from MockTypeDiscovery having a max depth.

I think the design decision to not create mock types too far down the hierarchy is reasonable. I know I don't currently have a use case that requires it. The properties won't actually be used past a certain depth.

The problem is that it breaks the ability to mock the top level interface.

IDE-Specific Issue?

• I've confirmed this issue occurs when running via dotnet test or dotnet run, not just in my IDE