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Rcov Rake Task For Rails Project

09.11.2007
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        This task will create a folder (doc/coverage) then run all of your tests and produce HTML with code coverage information in that folder. If you are on a mac it will even open the index.html file up for you automatically

# this requires the RCOV gem to be installed on your system
namespace :test do
  desc "Generate code coverage with rcov"
  task :coverage do
    rm_f "doc/coverage/coverage.data"
    rm_f "doc/coverage"
    mkdir "doc/coverage"
    rcov = %(rcov --rails --aggregate doc/coverage/coverage.data --text-summary -Ilib --html -o doc/coverage test/**/*_test.rb)
    system rcov
    system "open doc/coverage/index.html" if PLATFORM['darwin']
  end
end