Introduction

testpilot-ai is an AI-powered test generation tool for JavaScript and TypeScript that actually works. It generates tests, runs them, and auto-fixes failures in a loop until they pass.

Why testpilot-ai?

	testpilot-ai	Writing tests manually	Copilot suggestions
Speed	Entire test file in seconds	Hours per file	One test at a time
Coverage	Edge cases + error handling	Often forgotten	Inconsistent
Framework-aware	Vitest & Jest native	Manual setup	Generic
Multi-provider	OpenAI, Anthropic, Google, Ollama	—	OpenAI only
AST-based analysis	Understands your code structure	—	Context-window limited

Key Features

• TypeScript AST analysis — Uses the TypeScript compiler API to parse your code, extracting exported functions, classes, parameters, types, JSDoc, and imports
• Multi-provider LLM support — Works with OpenAI, Anthropic, Google, and Ollama (local models) via aiclientjs
• Framework-aware — Generates native Vitest or Jest tests with auto-detection from package.json
• Streaming output — Real-time LLM output in the terminal
• Smart configuration — CLI flags, config files, and package.json with sensible defaults
• Clean CLI — Beautiful terminal output with progress and summaries

Quick Example

npx testpilot src/utils.ts --provider openai

This will:

1. Analyze src/utils.ts using the TypeScript compiler API
2. Build a rich prompt with full type information
3. Send it to the LLM and stream the output
4. Write a src/utils.test.ts file with comprehensive tests