MiniProfiler API test

gistfile1.rb

class Animal
  def walk(distance, unit)
    sleep 0.1
    puts "walked #{distance} #{unit}"
  end
end

class Dog < Animal
end

module MiniProfiler
  def self.profile(klass, method, before, after)
    with_profiling = (method.to_s + "_with_mini_profiler").intern
    without_profiling = (method.to_s + "_without_mini_profiler").intern
    klass.send :alias_method, without_profiling, method

    klass.send :define_method, with_profiling do |*args|
      before.call *args
      start = Time.now
      self.send without_profiling, *args
      after.call ((Time.now - start) * 1000)
    end

    klass.send :alias_method, method, with_profiling
  end
end

MiniProfiler.profile(Animal, :walk, Proc.new{|distance,unit| puts "intercepted #{distance} #{unit}"}, Proc.new{|duration| puts "took #{duration}ms"})

Dog.new.walk(100, "miles")

#intercepted 100 miles
#walked 100 miles
#took 100.343863ms