Usando rcov desde cuisecontrol

Para que CruiseControl nos facilite información sobre el Code Coverage, necesitamos:

1. Gema rcov ('sudo gem install rcov'). Comprobamos ejecutando 'rcov' en el terminal.
2. Plugin rails_rcov ( './script/plugin install http://svn.codahale.com/rails_rcov' --> Doc: http://agilewebdevelopment.com/plugins/rails_rcov)
3. Añadir en lib/tasks/ el fichero cruise.rake con el siguiente contenido:

# Set the artifacts dir for development
ENV['CC_BUILD_ARTIFACTS'] ||= File.expand_path("#{RAILS_ROOT}/metrics")
ENV['RAILS_ENV'] = 'test'

# This hack is needed because db:test:purge implementation for MySQL drops the test database, invalidating
# the existing connection. A solution is to reconnect again.
def reconnect
require 'active_record' unless defined? ActiveRecord
configurations = ActiveRecord::Base.configurations
if configurations and configurations.has_key?("test") and configurations["test"]["adapter"] == 'mysql'
ActiveRecord::Base.establish_connection(:test)
end
end

desc 'Continuous build target'
task :cruise do
# Add local user gem path, in case rcov was installed with non-root access
#ENV['PATH'] = "#{ENV['PATH']}:#{File.join(Gem.user_dir, 'bin')}"

puts
puts "[CruiseControl] Build environment:"
puts "[CruiseControl] #{`cat /etc/issue`}"
puts "[CruiseControl] #{`uname -a`}"
puts "[CruiseControl] #{`ruby -v`}"
`gem env`.each_line {|line| print "[CruiseControl] #{line}"}
puts "[CruiseControl] Local gems:"
`gem list`.each_line {|line| print "[CruiseControl] #{line}"}
puts

out = ENV['CC_BUILD_ARTIFACTS']
mkdir_p out unless File.directory? out if out

if File.exists?(Dir.pwd + "/config/database.yml")
if Dir[Dir.pwd + "/db/migrate/*.rb"].empty?
raise "No migration scripts found in db/migrate/ but database.yml exists, " +
"CruiseControl won't be able to build the latest test database. Build aborted."
end

# perform standard Rails database cleanup/preparation tasks if they are defined in project
# this is necessary because there is no up-to-date development database on a continuous integration box
if Rake.application.lookup('db:test:purge')
Rake::Task['db:test:purge'].invoke
end
if Rake.application.lookup('db:migrate')
reconnect
Rake::Task['db:migrate'].invoke
end
end

if RUBY_VERSION == '1.8.7'
puts '!!!!!! Skipping rcov on Ruby 1.8.7'
Rake::Task["test:units"].invoke
Rake::Task["test:functionals"].invoke
else
ENV['SHOW_ONLY'] = 'models,lib,helpers'
Rake::Task["test:units:rcov"].invoke
mv 'coverage/units', "#{out}/unit test coverage" if out

ENV['SHOW_ONLY'] = 'controllers'
Rake::Task["test:functionals:rcov"].invoke
mv 'coverage/functionals', "#{out}/functional test coverage" if out
end
end

Para probar que funciona correctamente y que cruise-control no va a fallar, podemos probar a ejecutar:
rake cruise