🧪 Node Tests Generator

A Visual Studio Code extension that automatically generates unit tests for JavaScript, TypeScript, JSX, and TSX files using OpenRouter AI models like DeepSeek.

✨ Features

• 📄 Generates Jest test files from any file with exported functions.
• 🤖 Uses OpenRouter AI (e.g. DeepSeek) to write meaningful, context-aware unit tests.
• 💡 Supports JavaScript, TypeScript, JSX, and TSX.
• 🔧 Users can configure their API key and preferred model.
• 📢 Shows logs and feedback in the VS Code Output panel.

📦 Installation

1. Clone this repository:

   git clone https://github.com/your-username/node-tests-generator
   cd node-tests-generator
   npm install
   npm run package
   

2. In VS Code: Open the Command Palette (Cmd/Ctrl + Shift + P) Run Extensions: Install from VSIX... Select the generated .vsix file from the project root

🚀 Usage

1. Open a .js, .ts, .jsx, or .tsx file that contains exported functions.
2. Press Cmd/Ctrl + Shift + P and run: "Generate Tests for File".
3. The extension will generate a test file next to the original file (e.g., utils.test.js) with AI-generated Jest test cases.

⚙️ Configuration

🔑 API Key and Model You can provide your OpenRouter API key and preferred model in two ways:

Option 1: VS Code Settings

Go to Settings → Extensions → Node Tests Generator Set: API Key: your OpenRouter API key Model: (e.g., deepseek/deepseek-v3-base:free)

Option 2: .env file

Create a .env file at the project root:

OPENROUTER_API_KEY=your-api-key-here

If no API key is set in settings, the extension will fallback to the .env.

🧠 Prompt Strategy

The prompt sent to the model:

You are an expert in writing unit tests using Jest. Given the following code, generate a complete test file with relevant and meaningful test cases. Use best practices, edge cases, and Jest conventions.

Development

npm install
npm run watch
# Press F5 to run the extension in VS Code dev host

🤝 Contributing

Pull requests and suggestions are welcome! Feel free to open an issue if you find a bug or want to propose a feature.

🧾 License

MIT © 2025 Samuel Calderón