Exercise_2_DSL.rb

class AppServer
  attr_accessor :port, :admin_password
end

class Configuration
  attr_accessor :tail_logs, :max_connections, :admin_password
  def initialize
    @app_server = AppServer.new
  end

  def app_server
    yield(@app_server) if block_given?
    @app_server
  end
end


def configure(&block)
  config = Configuration.new
  block.call(config)
  config
end


### Just runs the 'tests' and prints results

configuration = configure do |config|  
  config.tail_logs = true  
  config.max_connections = 55  
  config.admin_password = 'secret'  
  config.app_server do |app_server_config|  
    app_server_config.port = 8808  
    app_server_config.admin_password = config.admin_password  
  end  
end  


puts configuration.class #=> Configuration  
puts configuration.tail_logs #=> true  
puts configuration.app_server.admin_password #=> 'secret'  

pass = true
pass &&= configuration.class == Configuration
pass &&= configuration.tail_logs == true
pass &&= configuration.app_server.admin_password == 'secret'

puts "\nResult: #{pass ? '\o/' : ':('}"