# In my test_helper

  def self.should_have_valid_test_data
    klass = self.name[/^(.*)Test$/, 1].constantize

    test "#{klass.name} should have valid fixtures" do
      invalids  = klass.all.reject{|m|m.valid?}
      message   = "Expected all #{klass.name} fixtures to be valid.\nInvalids:\n#{
                    invalids.map{|m| [m.errors.full_messages, m]}.pretty_inspect}"
      assert_block(message) { invalids.empty? }
    end

    test "#{klass.name} should have a valid factory" do
      f = Factory.build(klass.name.downcase.to_sym)
      f.valid?
      message   = "Expected #{name} factory to be valid.\nErrors:\n#{f.errors.full_messages.pretty_inspect}"
      assert_block(message) { f.valid? }
    end
  end