react-native-testsmith

Production-grade React Native testing CLI for Jest + React Native Testing Library, now with API-first AI generation.

v0.1.2 Announcement

• API-first workflow is now the default.
• init runs setup automatically.
• generate runs full pipeline: scan + API check + per-file AI test generation.
• Large files are chunked automatically for free-tier model limits.
• Terminal progress is shown per file with final response/generated counters.
• Reliability improvements include timeout, retries, and failed-file rerun mode.

Cloud API stack (current)

Built with FastAPI, hosted on Hugging Face Spaces.
Uses LLaMA 3.3 70B via Groq for fast inference.

Send any React Native component as plain text to /generate-tests and get:

• component summary
• key test scenarios
• full Jest + React Native Testing Library test file

System prompt is engineered to cover:

• rendering
• interactions
• state changes
• async behavior
• edge cases
• accessibility

Why this CLI exists

• remove repetitive RN Jest setup pain
• standardize test scaffolding across projects
• speed up test writing without blocking manual refinement

Install

npm i -g react-native-testsmith

Or inside a project:

npm i -D react-native-testsmith

Main commands

react-native-testsmith init
react-native-testsmith generate
react-native-testsmith generate --failed-only
react-native-testsmith doctor
react-native-testsmith doctor --json

Quickstart (recommended)

1. Go to your React Native app

cd mobileApp

2. Initialize config + Jest setup

react-native-testsmith init

3. Run full AI generation pipeline

react-native-testsmith generate

4. Retry only failed files if needed

react-native-testsmith generate --failed-only

Environment variables

• RN_TESTSMITH_API_URL (optional override for default API endpoint)
• RN_TESTSMITH_API_KEY (optional auth token)
• RN_TESTSMITH_API_CHUNK_SIZE (default: 12000)
• RN_TESTSMITH_API_TIMEOUT_MS (default: 120000)
• RN_TESTSMITH_API_RETRIES (default: 2)
• RN_TESTSMITH_API_BACKOFF_MS (default: 2000)

Output behavior

• generate scans .tsx/.jsx/.ts/.js including root App.ts/js/tsx/jsx
• test files mirror source structure under __tests__
• failed API files are saved to .react-native-testsmith/failed-files.json

Important note from maintainer

I built this CLI solo.
I have tried to make it production-level ready, but there may still be issues.

I am very open to:

• bug reports
• feature discussions
• architecture suggestions

Looking for collaborators and sponsors

I want to turn this into a broader testing ecosystem, not just a CLI.

Why sponsorship matters:

• host models on our own infrastructure
• use more efficient and stronger models
• improve reliability and throughput
• add richer workflows beyond test scaffolding

If you are interested in collaborating or sponsoring, please open an issue titled:

• Collaboration
• Sponsorship

For shared commits, use a Co-authored-by: Name <email> trailer in the message body so GitHub attributes work to every author.

Hashtags

#ReactNative #Jest #Testing #ReactNativeTestingLibrary #FastAPI #HuggingFace #Groq #OpenSource #DevTools #TypeScript