Description:

rcov is a tool for simple code coverage analysis in Ruby. It features:

- fast execution: 20-300 times faster than previous tools
- multiple analysis modes
- fairly accurate coverage information through code linkage inference using
simple heuristics
- XHTML and several kinds of text reports
- easy automation with Rake via a RcovTask
- colorblind-friendliness

Code coverage shouldn't be abused (in few words, C0 coverage guarantees
nothing) but it's still useful for testing: it will at least tell you when your
tests need more work, and most importantly where.