Tests generated with Roslyn Source Generators are not discovered

[CptWesley]

When using a Roslyn source generator to generate test classes/methods at compile time, TUnit is not able to discover the generated test cases.

An example of a generated source code:

namespace GeneratedNamespace
{
    public class GeneratedClass
    {
        [global::TUnit.Core.TestAttribute()]
        [global::TUnit.Core.ArgumentsAttribute(0, 0, 0)]
        [global::TUnit.Core.ArgumentsAttribute(1, 2, 3)]
        [global::TUnit.Core.ArgumentsAttribute(4, 2, 6)]
        public async Task GeneratedMethod(int n, int m, int __expected)
        {
            var found = n + m;
            await global::TUnit.Assertions.Assert.That(found).IsEqualTo(__expected);
        }
    }
}

Manually copying the generated files into the source directory works fine, so I believe it has something to do with how/when test discovery is performed.

[thomhurst]

TUnit uses source generators too. And source generators can't see code from other source generators. So nothing I can do really. This is more an issue for Roslyn I think

[CptWesley]

Ah, that explains. I didn't expect TUnit to use source generators, so I didn't consider that to be a potential cause.

Linking for context reference: dotnet/roslyn#48358

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