class Vnu < Formula homepage "https://validator.github.io/validator/" url "https://github.com/validator/validator/releases/download/20150216/vnu-20150216.jar.zip" sha1 "76806240e7f07d210e23e0dd96a06f6f2c5f0162" version "20150216" def install libexec.install "vnu.jar" bin.write_jar_script libexec/"vnu.jar", "vnu" end test do path = testpath/"index.html" path.write <<-EOS.undent hi EOS system bin/"vnu", path end end