class Ent < Formula
  desc "Pseudorandom number sequence test program"
  homepage "https://www.fourmilab.ch/random/"
  # This tarball is versioned and smaller, though non-official
  url "https://github.com/psm14/ent/archive/1.0.tar.gz"
  sha256 "6316b9956f2e0cc39f2b934f3c53019eafe2715316c260fd5c1e5ef4523ae520"

  def install
    system "make", "CC=#{ENV.cc}", "CFLAGS=#{ENV.cflags}"
    bin.install "ent"

    # Used in the below test
    prefix.install "entest.mas", "entitle.gif"
  end

  test do
    # Adapted from the test in the Makefile and entest.bat
    system "#{bin}/ent #{prefix}/entitle.gif > entest.bak"
    # The single > here was also in entest.bat
    system "#{bin}/ent -c #{prefix}/entitle.gif > entest.bak"
    system "#{bin}/ent -fc #{prefix}/entitle.gif >> entest.bak"
    system "#{bin}/ent -b #{prefix}/entitle.gif >> entest.bak"
    system "#{bin}/ent -bc #{prefix}/entitle.gif >> entest.bak"
    system "#{bin}/ent -t #{prefix}/entitle.gif >> entest.bak"
    system "#{bin}/ent -ct #{prefix}/entitle.gif >> entest.bak"
    system "#{bin}/ent -ft #{prefix}/entitle.gif >> entest.bak"
    system "#{bin}/ent -bt #{prefix}/entitle.gif >> entest.bak"
    system "#{bin}/ent -bct #{prefix}/entitle.gif >> entest.bak"
    system "diff entest.bak #{prefix}/entest.mas"
  end
end