TestFriend

🌟 Inspiration

Modern software development demands fast, reliable testing, but writing test functions can be cumbersome and most tools either feel too rigid or too complex for everyday function-level validation. We wanted to build something that felt like a developer’s sidekick: intuitive, interactive, and smart enough to catch issues before they escalate. TestFriend was born from that need - a lightweight companion for automated function testing that feels approachable yet powerful.

⚙️ What it does

TestFriend is an interactive testing tool designed to validate individual functions in real time. Developers can select functions -> define inputs -> check the function output and instantly mark as pass/fail. It supports:

• Auto-generated test cases based on function signatures
  
• Live assertion feedback
  
• Mocking and edge case detection
  
• Visual summaries of test outcomes
  

Whether you're writing Python utilities or debugging algorithmic logic, TestFriend helps you test smarter, not harder.

🛠️ How we built it

We built TestFriend using:

• Python as the choice of programming language
• Kiro for vibe-coding the application
  
• Modular architecture to support extensibility (e.g., adding new test types)
  

🚧 Challenges we ran into

• Balancing simplicity with flexibility - especially around custom test inputs
  
• Ensuring fast feedback loops without compromising accuracy
  
• Handling edge cases like class inputs and class methods
  

🏆 Accomplishments that we're proud of

• Built a fully functional prototype with real-time test feedback
  
• Intelligent generation of inputs using LLM
• Created a friendly UI that lowers the barrier to entry for new developers
  
• Designed a scalable architecture that can support multiple codebases

📚 What we learned

• Interactive test feedback encourages better coding habits and faster debugging
  
• Even simple tools benefit from thoughtful UX and modular design
  

🚀 What's next for TestFriend

• Add support for function testing in other languages - JavaScript, Rust, TypeScript and C#
  
• Add support for testing input ranges
• Build a plugin for IDEs
• Expand test summary visualization with code coverage overview
• Integrate with other LLM APIs for generating intelligent inputs
• Automatically Generate PyTest-based functions using LLMs

Built With

• gpt
• kiro
• python