Set up automated testing

Wire TsVRC's testing helpers into your project so you can write Play Mode and Edit Mode tests against your own UdonSharpBehaviours.

1. Put your scripts and generated code in one assembly

TsVRC's generated code declares the base types your world scripts extend (TsBehaviour, TsInstance, and so on), and in turn references concrete types from your own scripts: a Construct or Factory entry generates a field typed as whatever class you registered. That's a two-way dependency, and Unity doesn't allow two assembly definitions to reference each other. Give your project's own scripts folder a single asmdef placed high enough in the folder tree to cover both your hand-written scripts and wherever your TsConfig's generated-folder setting points (they don't need to be nested inside each other, just both under that one asmdef's root), referencing Tsvrc.Runtime plus whatever VRChat SDK/ UdonSharp assemblies your scripts use.

2. Add a test assembly

Create an EditMode or PlayMode test assembly referencing your project's runtime asmdef, Tsvrc.Runtime, and Tsvrc.Testing.Framework for the reflection and ClientSim helpers. Add Tsvrc.Testing.Behaviours or Tsvrc.Testing.UI too if your tests need the listener or list-item doubles they provide.

3. Arm reactive codegen suppression for Play Mode tests

A test that creates or mutates scene objects can otherwise trigger a real codegen regenerate pass against your project's actual TsConfig mid-test-run. Add a one-line [SetUpFixture] subclass to your PlayMode test assembly to hold that back for the whole run:

[SetUpFixture]
public class AutomaticTriggersSetUpFixture : AutomaticTriggersSetUpFixtureBase { }

NUnit only discovers a [SetUpFixture] in the assembly it's physically compiled into, so this needs adding once per test assembly. The base class living in Tsvrc.Testing.Framework isn't enough by itself.

With these three pieces in place, extend TsPlayModeTestBase to write a Play Mode test, or call PrivateFieldAccess's static methods directly for an Edit Mode one.