Automatically generate production-ready unit tests with real assertions by analyzing your source code logic.
Install & Download
1. ClawHub CLI
The fastest way to install a skill directly from the registry.
npx clawhub@latest install test-writer
2. Manual Installation
Copy the skill folder to one of these locations
~/.openclaw/skills/ <project>/skills/ Priority: Workspace > Local > Bundled
3. Prompt Installation
Copy this prompt to OpenClaw to install it automatically.
Help me install test-writer using Clawhub. If Clawhub is not installed, install it first (npm i -g clawhub).
Prefer to download?
Get the raw skill files in a ZIP archive.
What is Test Writer?
Test Writer is a powerful utility within the Openclaw Skills ecosystem designed to solve the common developer bottleneck of manual test creation. By interpreting your source files, it understands function signatures, logic flow, and type definitions to produce high-quality unit tests that go beyond simple boilerplate.
This skill provides developers with a zero-config solution to increase test coverage across modern JavaScript and TypeScript projects. Whether you are working on complex utility functions or simple helpers, it ensures your code is backed by reliable assertions tailored to your specific logic.
Test Writer Use Cases
- Rapidly adding test coverage to legacy projects or files that lack existing tests.
- Generating initial test suites for new utility functions and pure logic.
- Satisfying code review requirements for unit testing when working under tight deadlines.
- Creating a foundational set of tests that can be manually extended for complex edge cases.
How Test Writer Works
- The tool parses the provided source files or glob patterns to extract logic and function signatures.
- It analyzes the relationship between inputs and outputs to determine logical test boundaries.
- Using advanced AI, it generates assertions that validate the actual behavior of the code.
- The output is formatted for your specific testing framework (Jest, Vitest, or Mocha) and written to the filesystem.
Test Writer Setup
No installation is required to start using this part of the Openclaw Skills toolkit. You can execute it directly using npx with Node.js 18+.
npx ai-test-gen src/your-file.ts
To see all configuration options, including framework selection:
npx ai-test-gen --help
Test Writer Data Schema & Taxonomy
| Element | Details |
|---|---|
| Input Sources | JavaScript (.js) or TypeScript (.ts) files, supporting glob patterns. |
| Frameworks | Native support for Jest, Vitest, and Mocha. |
| Output Type | Fully formatted test files with imports and describe/test blocks. |
| Metadata | Logic flow analysis and type definitions used for assertion accuracy. |
Test Writer Advanced Features
- Multi-file processing using standard glob patterns for bulk test generation.
- Intelligent framework detection and manual override via the --framework flag.
- Logic-aware assertion generation that tracks variable states and return types.
- Seamless integration into CI/CD pipelines as part of a wider Openclaw Skills automation strategy.
SKILL.md
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