RSpec2 custom matcher for DiffMatcher gem

be_hash_matching.rb

require 'diff_matcher'
 
RSpec::Matchers.define :be_hash_matching do |expected|
  match do |actual|
    opts = {:color_enabled=>RSpec::configuration.color_enabled?}
    @difference = DiffMatcher::Difference.new(expected, actual, opts)
    @difference.matching?
  end
 
  failure_message_for_should do |actual|
    @difference.to_s
  end
end