Autotest.add_hook :initialize do |at|
   %w{.hg .git .svn stories tmtags Rakefile \ 
     nbproject Capfile README spec/spec.opts \
     spec/rcov.opts vendor/gems autotest svn-commit \
     .DS_Store }.each {
     |exception|at.add_exception(exception)
   }

   at.add_mapping(%r%^app/models/.*\.rb$%) {
     at.files_matching(%r%^spec/models/.*_spec.rb$%)
   }

  end