---
id: setup/test-infrastructure
name: Set up vitest test infrastructure with fixtures, helpers, and reactive test patterns
status: completed
depends_on:
  - setup/project-init
scope: narrow
risk: low
impact: component
level: implementation
---

## Description

Create the test infrastructure that all downstream test files will depend on: shared fixtures, helper functions for graph construction, and the reactive test pattern (create root → transition → assert → dispose). This ensures consistent test setup across all modules.

Per [build-distribution.md](../docs/architecture/build-distribution.md) testing strategy section.

## Acceptance Criteria

- [ ] `test/helpers/` directory with shared test utilities
- [ ] `test/helpers/graph-factory.ts` — helpers to build test operation graphs and call graphs with known structures
- [ ] `test/helpers/reactive.ts` — helper to create `WorkflowReactiveRoot` instances for testing: setup → transition → assert → dispose pattern
- [ ] `test/helpers/schemas.ts` — sample TypeBox schemas for testing `typeCompat()` (compatible pairs, incompatible pairs, unknown schemas)
- [ ] All helpers are importable from `test/helpers/`
- [ ] `vitest.config.ts` includes `test/helpers/` in setup or alias configuration

## References

- docs/architecture/build-distribution.md — testing strategy, reactive test patterns
- docs/architecture/reactive-execution.md — WorkflowReactiveRoot lifecycle (setup → assert → dispose)

## Notes

> To be filled by implementation agent

## Summary

> To be filled on completion