#!/usr/bin/env ruby

# Copyright, 2012, by Samuel G. D. Williams. <http://www.codeotaku.com>
# 
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
# 
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.

require 'minitest/autorun'

require 'rubydns'
require 'rubydns/system'

require 'benchmark'

class ResolverPerformanceTest < MiniTest::Test
	# The larger this number, the better RubyDNS::Resolver will look as it is highly asynchronous.
	DOMAINS = %W{
		Facebook.com
		Twitter.com
		Google.com
		Youtube.com
		Wordpress.org
		Adobe.com
		Blogspot.com
		Wikipedia.org
		Linkedin.com
		Wordpress.com
		Yahoo.com
		Amazon.com
		Flickr.com
		Pinterest.com
		Tumblr.com
		W3.org
		Apple.com
		Myspace.com
		Vimeo.com
		Microsoft.com
		Youtu.be
		Qq.com
		Digg.com
		Baidu.com
		Stumbleupon.com
		Addthis.com
		Statcounter.com
		Feedburner.com
		TradeMe.co.nz
		Delicious.com
		Nytimes.com
		Reddit.com
		Weebly.com
		Bbc.co.uk
		Blogger.com
		Msn.com
		Macromedia.com
		Goo.gl
		Instagram.com
		Gov.uk
		Icio.us
		Yandex.ru
		Cnn.com
		Webs.com
		Google.de
		T.co
		Livejournal.com
		Imdb.com
		Mail.ru
		Jimdo.com
	}
	
	def test_resolvers
		rubydns_resolved = {}
		resolv_resolved = {}
		
		puts nil, "Comparing resolvers..."
		Benchmark.bm(20) do |x|
			x.report("RubyDNS::Resolver") do
				resolver = RubyDNS::Resolver.new([[:udp, "8.8.8.8", 53], [:tcp, "8.8.8.8", 53]])
				
				# Number of requests remaining since this is an asynchronous event loop:
				pending = DOMAINS.size
				
				EventMachine::run do
					DOMAINS.each do |domain|
						resolver.addresses_for(domain) do |addresses|
							rubydns_resolved[domain] = addresses
							
							EventMachine::stop if (pending -= 1) == 0
						end
					end
				end
			end
			
			x.report("Resolv::DNS") do
				resolver = Resolv::DNS.new(:nameserver => "8.8.8.8")
				
				DOMAINS.each do |domain|
					resolv_resolved[domain] = resolver.getaddresses(domain)
				end
			end
		end
		
		DOMAINS.first(3).each do |domain|
			# We don't really care if the responses aren't identical - they should be most of the time but due to the way DNS works this isn't always the case:
			refute_empty resolv_resolved[domain]
			refute_empty rubydns_resolved[domain]
		end
	end
end