[Bug]: MethodDataSourceAttribute.Factory is incorrect

[kzrnm]

Description

Attributes can only take literal values as parameters.

Since MethodDataSourceAttribute.Factory is Func<T>, it cannot be specified. Since it cannot be used, it is not documented either.

https://learn.microsoft.com/dotnet/csharp/language-reference/compiler-messages/parameter-argument-mismatch#arguments-for-attributes

This appears to be an LLM hallucination. #2600

Expected Behavior

Remove MethodDataSourceAttribute.Factory.

Actual Behavior

There is MethodDataSourceAttribute.Factory.

Steps to Reproduce

[MethodDataSource("Data", Factory = default)]

TUnit Version

1.43.11

.NET Version

.NET 9

Operating System

Windows

IDE / Test Runner

dotnet CLI (dotnet test / dotnet run)

Error Output / Stack Trace

Additional Context

No response

IDE-Specific Issue?

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

[thomhurst]

It gets populated by the source generator, there's special logic for it. Look at the generated code for a test using a method data source

[kzrnm]

Ah, I see. It might be clearer if the xmldoc explicitly stated that it is intended for use by the source generator.