Test Case Generation System

A full-stack application for generating hierarchical test cases (L1, L2, L3) based on business requirements using LangGraph and AI.

Features

• 🔐 User authentication (Signup/Login)
• 📝 Create multiple test case generation sessions
• 🤖 AI-powered test case generation
• 🌳 Interactive tree visualization of test cases
• 📊 Session history and management
• 💾 Persistent storage of all sessions

Tech Stack

Backend

• FastAPI
• SQLAlchemy (SQLite/PostgreSQL)
• JWT Authentication
• LangGraph for workflow management
• OpenAI API

Frontend

• React 18
• Vite
• Tailwind CSS
• React Router
• Axios

Setup Instructions

Prerequisites

• Python 3.8+
• Node.js 18+
• OpenAI API Key

Backend Setup

1. Navigate to backend directory:

cd backend

2. Create virtual environment:

python -m venv venv
source venv/bin/activate  # On Windows: venv\Scripts\activate

3. Install dependencies:

pip install -r requirements.txt

4. Create .env file in the root directory:

OPENAI_API_KEY=your-openai-api-key-here
DATABASE_URL=sqlite:///./testcasegen.db
SECRET_KEY=your-secret-key-change-this-in-production

5. Run the backend server:

python main.py

The API will be available at http://localhost:8000

Frontend Setup

1. Navigate to frontend directory:

cd frontend

2. Install dependencies:

npm install

3. Start the development server:

npm run dev

The frontend will be available at http://localhost:3000

Usage

1. Sign Up: Create a new account
2. Login: Sign in with your credentials
3. Create Session: Click "New Session" and enter your business description
4. Answer Questions: Answer optional clarification questions
5. Select Test Cases: Click on L1/L2 test cases to explore further
6. View Tree: See the complete hierarchical tree of test cases

Project Structure

.
├── backend/
│   ├── main.py              # FastAPI application
│   ├── database.py          # Database configuration
│   ├── models.py            # SQLAlchemy models
│   ├── schemas.py           # Pydantic schemas
│   ├── auth.py              # Authentication utilities
│   └── requirements.txt     # Python dependencies
├── frontend/
│   ├── src/
│   │   ├── pages/           # Page components
│   │   ├── components/      # Reusable components
│   │   ├── contexts/        # React contexts
│   │   └── services/        # API services
│   └── package.json         # Node dependencies
├── testcasegen.py           # Core test case generation logic
└── README.md

API Endpoints

Authentication

• POST /api/auth/signup - Register new user
• POST /api/auth/login - Login user
• GET /api/auth/me - Get current user

Sessions

• GET /api/sessions - Get all user sessions
• POST /api/sessions - Create new session
• GET /api/sessions/{id} - Get session details
• DELETE /api/sessions/{id} - Delete session

Test Case Generation

• POST /api/sessions/{id}/start - Start test case generation
• POST /api/sessions/{id}/l1/answers - Submit L1 answers
• POST /api/sessions/{id}/l1/select - Select L1 case
• POST /api/sessions/{id}/l2/answers - Submit L2 answers
• POST /api/sessions/{id}/l2/select - Select L2 case
• POST /api/sessions/{id}/l3/answers - Submit L3 answers
• GET /api/sessions/{id}/state - Get session state

Development

Backend Development

cd backend
uvicorn main:app --reload

Frontend Development

cd frontend
npm run dev

Notes

• Make sure to set your OpenAI API key in the .env file
• The backend uses SQLite by default. For production, consider PostgreSQL
• Change the SECRET_KEY in backend/auth.py for production use
• CORS is configured for localhost:3000 and localhost:5173