public void Add_id()
        {
            var h = new HtmlAttributes(@class => "class1");

            h.Id("anId");

            Assert.That(h.ToHtmlString(), Is.EqualTo(" class=\"class1\" id=\"anId\""));
        }
        public void Add_sanitised_id()
        {
            var h = new HtmlAttributes();

            h.Id("Model.Id");

            Assert.That(h.ToHtmlString(), Is.EqualTo(" id=\"Model_Id\""));
        }