I asked an AI agent to test my framework. It found the bugs I couldn't see, then built me a debugger.

Description and use

An AI assistant read the UECA‑React code, wrote tests, uncovered hidden bugs, raised coverage above 90 %, and released version 3.0 with better error handling. It then built a visual debugger showing component trees and message traffic.

Problem

The UECA-React framework had hidden bugs and lacked comprehensive testing, making it difficult for developers other than the original author to understand failure modes and maintain the code.

Outcome

AI-driven testing uncovered numerous hidden bugs, increased coverage to over 90%, and led to version 3.0 with improved error handling. The AI also built a debugger that visualizes component interactions, enhancing maintainability and debugging.

Workflow

• 1. Author asked AI agent to cover framework with tests.
• 2. Agent read code, documented functionality, and wrote tests using tiny UECA applications.
• 3. Tests identified bugs in abnormal scenarios (bindings, events).
• 4. Agent fixed bugs, generating new ideas for error handling and strict mode support.
• 5. Coverage increased to >90% and version 3.0 released.
• 6. Author asked agent to build a visual trace viewer.
• 7. Agent improved tracing system and built viewer showing component tree, message bus, bindings, with stop/playback.
• 8. Viewer first implemented in plain React, then rewritten in UECA-React for better performance.

Evidence

It read the code, wrote documentation of how it works, noticed my test style, and started writing tests the same way: tiny UECA applications, with an application component at the root and test components plugged in.

Source

Coverage is now above 90%. This is what became version 3.0: mistakes that used to be logged and dropped now throw and reach a single error handler, and React.StrictMode is supported.

Source

The agent saw my tracing system, improved it to carry more useful information, and built the viewer: component tree, message bus traffic, bindings, with stop and playback.

Source