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"

  bottle do
    cellar :any_skip_relocation
    sha256 "f5244a065b7aafe3ba60077de0072e9b5d231a7fd1eb348cd7f6583a69a08ad3" => :el_capitan
    sha256 "072e3e71ee3b6813dafb15e53e8b474c1d15f26865b9cd05652e46c220e3926d" => :yosemite
    sha256 "cb4bd5766cdb804092f73a908921e034da352b890fdc34f5cc1f0d56a27d3c3a" => :mavericks
  end

  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
