capture per test logging with logging and rspec

spec_log.rb

require 'rubygems'
require 'spec'
require 'stringio'
require 'logging'

Logging::Logger['root'].level = :all
module Spec
  module Log
    def self.io
      @io ||= StringIO.new
    end
    def self.appender
      @appender ||= Logging::Appenders::IO.new( "speclog", io )
    end

    Logging::Logger['root'].add_appenders( Log.appender )

    def self.layout
      @layout ||= Logging::Layouts::Pattern.new(
        :pattern      => "[%d] %5l %6p %c : %m\n",
        :date_pattern => "%Y-%m-%d %H:%M:%S"
      )
    end

    Log.appender.layout = layout

  end

  module Helpers

    # the logging output from the test, if that class has any logging
    def spec_log
      Log.io.string
    end
  end
end

Spec::Runner.configure do |config|
  include Spec::Helpers
  config.before do
    Spec::Log.io.rewind
    Spec::Log.io.truncate( 0 )
  end

  config.after do
    Spec::Log.io.rewind
    Spec::Log.io.truncate( 0 )
  end
end