🧪 Test Case Generator

A web application that analyzes source code and automatically generates test case scenarios and full unit test code using Google's Gemini API. Built with React (frontend) and Express.js (backend), and deployed on Render.

Developed as part of an internship assignment, with additional enhancements for production readiness.

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🚀 Live Website

https://testcase-generator-6npc.onrender.com

📸 Screenshots

Test-case Generator using GitHub API

Files selector

Test case summaries by Gemini API

Generated Test Cases using Gemini API

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⚙️ Features

• Upload multiple code files.
• AI-powered test case summaries.
• Generate full unit test code in:
  • JUnit (Java)
  • PyTest (Python)
  • Jest (JavaScript)
  • NUnit (C#)
• One-click GitHub PR creation with generated tests.

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🛠️ Tech Stack

• Frontend: React, Tailwind CSS
• Backend: Node.js, Express.js, Google Generative AI SDK
• Hosting: Render
• Version Control: Git + GitHub

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📂 Folder Structure

testcase_generator/
│
├── assets/               # Screenshots for README
├── frontend/             # React app
├── backend/              # Express.js server
├── Sample/               # Sample codes to generate test cases
└── README.md

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🧑‍💻 Setup & Installation

1️⃣ Clone the Repository

git clone https://github.com/aryanpratik11/testcase_generator.git
cd testcase_generator

2️⃣ Backend Setup

cd backend
npm install

Create a .env file:

PORT=5000 #or any port of your choice
GEMINI_API_KEY=your_api_key_here

Run the backend:

node index.js

3️⃣ Frontend Setup

cd ../frontend
npm install
npm start

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📡 API Endpoints

Method	Endpoint	Description
POST	/api/generate	Generates test case summaries from code
POST	/api/generateCode	Generates full unit test code
POST	/api/create-pr	Creates a GitHub PR with generated tests

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🌐 Deployment

• Frontend: Hosted on Render, connected to main branch.
• Backend: Hosted on Render, with .env set via Render's Environment settings.

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🤝 Contributing

Contributions are welcome!

1. Fork the repo
2. Create your branch (git checkout -b branch_name)
3. Commit changes (git commit -m "Exact feature you are implementing")
4. Push to branch (git push origin branch_name)
5. Open a Pull Request

Extra features like allowing test cases editing before PR creation or any such features are invited.

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