Controller rspec matcher for cookies in rails 2.3

have_cookie_rspec_matcher.rb

  class HaveCookie
    def initialize(expected_name, expected_value, expected_expiry, allowed_variance)
      @expected_name, @expected_value, @expected_expiry, @allowed_variance = expected_name, expected_value, expected_expiry, allowed_variance
    end
  
    def matches?(actual_response)
      actual_cookie_parts = {}
      Array(actual_response.headers['Set-Cookie']).each do |cookie|
        parts = CGI::Cookie.parse(cookie)
        if parts.keys.include? @expected_name.to_s
          actual_cookie_parts[:value] = parts[@expected_name].first
          actual_cookie_parts[:expires] = Time.zone.parse(parts["expires"].first)
          break 
        end
      end
      raise "Not able to find a cookie with name #{@expected_name}" if actual_cookie_parts.blank?
      
      @actual_value = actual_cookie_parts[:value]
      @actual_expiry = actual_cookie_parts[:expires]
      
      @expected_value == @actual_value && (@actual_expiry - @expected_expiry).abs < @allowed_variance
    end
  
    def failure_message
      "expected #{@expected_name} cookie with value:#{@actual_value} and expiry:#{@actual_expiry} to have value:#{@expected_value} and expiry:#{@expected_expiry}"
    end
  
    def negative_failure_message
      "expected #{@expected_name} cookie with value:#{@actual_value} and expiry:#{@actual_expiry} to not have value:#{@expected_value} and expiry:#{@expected_expiry}"
    end
  end
  
  def have_cookie(expected_name, expected_value, expected_expiry, allowed_variance = 5)
    HaveCookie.new(expected_name.to_s, expected_value, expected_expiry, allowed_variance)
  end