Test the various default options for ruby Zlib::Deflate.

zlib_deflate_tests.rb

# Usage:
#  ruby zlib_deflate_tests.rb < input_file
#
# Robert Haines

require 'zlib'

puts "Tests for Ruby Zlib\n-------------------\n\n"

comp = [
  'Zlib::DEFAULT_COMPRESSION',
  'Zlib::NO_COMPRESSION',
  'Zlib::BEST_COMPRESSION',
  'Zlib::BEST_SPEED'
]

input = ARGF.read

comp.each { |var| puts "#{var}: #{eval(var)}" }

puts "\nInput size (raw): #{input.size}, 100.00%"
puts input[0..50]
puts

comp.each do |var|
  output = Zlib::Deflate.deflate(input, eval(var))
  puts "Output size (#{var}): #{output.size}, #{(output.size/(input.size * 1.0)) * 100}%"
  puts output[0..50]
  puts
end