EmbeddingGemma 2: an open, lightweight multimodal embedding model
deepmind.google·6d ago
AI Engineering
Hacker News·Aug 3·5 min read
AI migrated legacy COBOL programs to Java, bugs included
TL;DR
A novel method called the 'Locksmith Loop' was developed to validate the migration of legacy COBOL programs to Java, achieving high test coverage and matching functionality. This approach significantly improved testing outcomes, demonstrating effective validation of agentic coding outputs.
✦ Why It Matters
Consider implementing the Locksmith Loop for your legacy code migrations to enhance testing accuracy.
Key Takeaways
- Utilize the Locksmith Loop for validating code migrations.
- Prepare runtime environments with mocks for effective testing.
- Focus on achieving high test coverage during migrations.
- Implement deterministic checks to ensure functional parity.
How It Works
The Locksmith Loop operates by setting up two environments: one for the original COBOL code and another for the generated Java code. It uses mocks to simulate inputs and an iterative process called Witness Search to explore different branches of the program.
When it encounters a Locked Paragraph, which indicates a limitation in exploration, it uses parity-preserving mutations to continue testing. This method allows for deeper testing and improved coverage.