---
title: Testing Reactors
---

Chronicle provides the `ReactorScenario<TReactor>` utility for testing reactor implementations entirely in-process, with no Chronicle server, gRPC transport, or observer registration required.

## Topics

| Guide | Description |
|-------|-------------|
| [ReactorScenario](/chronicle/testing/reactors/scenario/) | Test reactor side-effects in-process using `ReactorScenario<TReactor>` |