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Sebastian Bergmann's Blog:
CRAP in PHPUnit 3.5
January 12, 2010 @ 11:14:03

As Sebastian Bergmann mentions in his latest post, he's changed up how the code coverage functionality is handled in PHPUnit so that he can add something new - CRAP.

PHP_CodeCoverage is a component that provides collection, processing, and rendering functionality for PHP code coverage information. [...] Having all code that deals with code coverage in a separate component allows for easier development and better testing. The first result of these improved development conditions is a small new feature that I recently implemented, the support for the CRAP metric.

Your code's CRAP (Change Risk Analysis and Predictions) scoring combines the idea of cyclomatic complexity and code coverage statistics to try to guess at how difficult any given piece of code would be to maintain. You can see an example here - the lower the number the better.

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