require 'benchmark'

module BenchmarkHelpers
  def benchmark(description, &block)
    # 1. Nope
    #bm_proc = Proc.new do
    #  db = Proc.new { |bm| bm.report(description, &block) }
    #  Benchmark.bm(description.length, &db)
    #end
    it description do
      Benchmark.bm(description.length) do |bm|
        # 2. Nada
        #bm.report description, &block
        bm.report description do
          # 3. Zilch.
          #block.call
          #block.yield
          # eval in context of example_group_instance!
          example.example_group_instance.instance_eval(&block)
        end
      end
    end
  end
end

RSpec.configure do |c|
  c.extend BenchmarkHelpers
end

describe "scopes" do
  it "succeeds" do
    p self.class
    p be
    true.should == true # success
    true.should be      # success
  end
  benchmark "throws exception on 'be'" do
    p self.class
    p be
    true.should == true # success
    true.should be      # exception
  end
end


/home/aaron/.rvm/rubies/ruby-1.9.2-p290/bin/ruby -S bundle exec rspec spec/benchmark_spec.rb

scopes
RSpec::Core::ExampleGroup::Nested_1
#<RSpec::Matchers::Be:0x00000002822740 @args=[]>
  succeeds
                              user     system      total        real
throws exception on 'be'RSpec::Core::ExampleGroup::Nested_1
#<RSpec::Matchers::Be:0x0000000281f068 @args=[]>
  0.000000   0.000000   0.000000 (  0.000091)
  throws exception on 'be'

Finished in 0.0016 seconds
2 examples, 0 failures