require 'formula' class Markdown < Formula homepage 'http://daringfireball.net/projects/markdown/' url 'http://daringfireball.net/projects/downloads/Markdown_1.0.1.zip' sha1 '7e6d1d9224f16fec5631bf6bc5147f1e64715a4b' conflicts_with 'discount', :because => 'both markdown and discount ship a `markdown` executable.' def install bin.install 'Markdown.pl' => 'markdown' end test do IO.popen("#{bin}/markdown", "w+") do |pipe| pipe.write "foo *bar*\n" pipe.close_write assert_equal "

foo bar

\n", pipe.read end end end