public void SettingSelectedToFalseRemovesAttributeTest()
{
var page = Substitute.For<IHtmlPage>();
var doc = new XmlDocument();
doc.LoadXml("<option selected='selected' value='test'>contents</option>");
var target = new HtmlListItem(page, doc.DocumentElement);
target.Selected = false;
target.Selected.Should().BeFalse();
target.Html.Should().NotContain("selected");
}