How to define a test that will test multiple versions of a thing

test_helper.rb

 class ProductionTests < ActiveSupport::TestCase
  class << self
    alias :actually_define_test :test
    def test(name, &block)
      if name.include? "pdf"
        VALID_PRINCE_VERSIONS.each do |version|
          actually_define_test("#{name}_prince_v#{version}") do
            @prince_version = version
            @doc_name = "#{@prince_version}-#{name}"
            instance_eval &block
          end
        end
      else
        @doc_name = nil
        actually_define_test name, &block
      end
    end
  end
 end