gistfile1.rb

RSpec::Matchers.define :be_less_than do |expected|
  match do |actual|
    result = actual<expected
    result &&=actual>@low_value unless @low_value.nil?
    result
  end
  chain :and_greater_than do |low_value|
    @low_value=low_value
  end
  description do
     result = "should be less than #{expected}"
     result += " and greater than #{@low_value}" if @low_value
     result
  end
end