Add Unit tests for Mono module (C#)

[Hilderin]

Describe the project you are working on

I'm working on optimizations in the C# interoperability module and I want to be sure I don't break anything.

Describe the problem or limitation you are having in your project

There are no unit test that automatically test the C# integration in Godot. All my tests are manual and it's difficult to spot regressions.

Describe the feature / enhancement and how it helps to overcome the problem or limitation

I suggest adding a test suite for the mono module. This module could be run locally with --test and should be run in the CI pipeline like the other tests preventing regressions.

Describe how your proposal will work, with code, pseudo-code, mock-ups, and/or diagrams

I suggest creating a C# project in a sub directory of the mono module. This project is rebuilt at the beginning of the tests (testing the glue and code generator at the same time).
After that, it's a question of creating tests that use CSharpLanguage to test the binding between Godot and C#.

Not all the methods generated needs to be tested since they are generated by code.

To begin, I would suggest tests like:

• GetGodotClassPropertyValue
• GetGodotMethodList
• GetGodotPropertyList
• HashGodotClassMethod
• InvokeGodotClassMethod
• SetGodotClassPropertyValue
• Signals
• RestoreGodotObjectData
• SaveGodotObjectData
• Tests these with inheritance

If this enhancement will not be used often, can it be worked around with a few lines of script?

I don't think so.

Is there a reason why this should be core and not an add-on in the asset library?

It's part of the engine.

[AThousandShips]

Related:

• Add or document a way to write unit tests for Godot C# projects (e.g. with nunit3) #432

[Hilderin]

Wow, I have been working around C# integrated to Godot for a couple of months now, and I just found out about the project Godot.SourceGenerators.Tests in Godot.NET.Sdk.sln.

I'm closing this proposal!!