Extend an object with this module to print out all method calls to it.

log_calls.rb

module LogCalls
  def self.extended(b)
    b.class_eval do
      (b.methods - Object.methods).each do |m|
        define_method "#{m.to_s.gsub(/[\?\!=]/, '')}_with_logging#{m.to_s[/[\?\!=]/]}" do |*args|
          puts m
          send "#{m.to_s.gsub(/[\?\!=]/, '')}_without_logging#{m.to_s[/[\?\!=]/]}", *args
        end
        alias_method_chain m.to_sym, :logging
      end
    end
  end
end