Bridge the testing gap: Jest-style tests in real native environments. Get the convenience of describe/it with full access to native modules.
- Jest-Style Syntax, Native Power: Write familiar describe/it tests that run in real iOS and Android environments with full native module access.
- Best of Both Worlds: Unlike Jest (Node.js only) or Maestro (UI-based), get convenient test syntax AND native environment execution.
- Real Device & Simulator Testing: Execute tests directly on iOS simulators and Android emulators — catch platform-specific issues Jest can't see.
- Native Module Testing: Test native modules, platform APIs, and device-specific functionality that's impossible with JavaScript-only runners.
- Familiar Test Structure: Use beforeEach, afterEach, describe, it, expect — all the testing patterns you know and love from Jest.
- Zero Configuration Setup: Drop-in replacement for your existing test workflow with TypeScript support and seamless CI/CD integration.
Warning
This library is still under active development. Feel free to hack around, but use at your own risk.
The documentation is available at react-native-harness.dev. You can also use the following links to jump to specific topics:
react-native-harness is an open source project and will always remain free to use. If you think it's cool, please star it 🌟. Callstack is a group of React and React Native geeks, contact us at hello@callstack.com if you need any help with these or just want to say hi!
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