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Managed Chaos
Naresh Jain's Random Thoughts on Software Development and Adventure Sports
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Signs of a Healthy Codebase

I’ve become a big fan of displaying metric using Treemaps. Julias Shaw‘s Panpoticode is a great tool to produce useful design metric in the treemap format for your Java project.

In the past, I’ve used these graphs to show Before and After snapshots of various projects after a small refactoring effort. In this blog I want to show you a healthy project’s codebase and highlight somethings that makes me feel comfortable about the codebase. (Actually there is not much to talk, a picture is worth a thousand words.)

Following is the code coverage report from a project:


Couple of quick observations:

  • Majority of the code has coverage over 75% (Our goal is not to have every single class with 100% code coverage. Code Coverage does not talk about Quality of your tests.)
  • There is a decent distribution of code across packages, classes and methods. (No large boxes standing out.)
  • You don’t see large black patches (ones you see are classes that were mocked out for testing).

Lets look at the complexity graph:

  • Except for a couple of methods, most of them have Cyclomatic Complexity under 5.
  • You don’t see large red or black boxes which are clear indicators of complex code.

Panopticode combined with CheckStyle, FindBugs and JDepends can give you a lot more info to check the real pulse of your codebase.

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