test-debt

HeatMetro is a web-based tool that uses the code city metaphor to visualize test debt in large Java and Go projects. It combines interactive 3D software visualization with a context-aware code coverage criterion, helping developers identify, explore, and understand testing-critical components beyond traditional coverage metrics.

Design project — coverage-gap analyser that turns a Cobertura coverage.xml into a ranked test-debt queue. 18-page report + interactive demo.