public void When_playing_with_css_class_Then_doesnt_fail() { var control = new LiteralControl(System.Web.UI.HtmlTextWriterTag.Span) { CssClass = "lol" }; Assert.That(control.CssClass, Is.EqualTo("lol")); control.AddCssClass("wat"); Assert.That(control.CssClass, Is.EqualTo("lol wat")); control.AddCssClass(""); Assert.That(control.CssClass, Is.EqualTo("lol wat")); control.RemoveCssClass(""); Assert.That(control.CssClass, Is.EqualTo("lol wat")); control.RemoveCssClass("wat"); Assert.That(control.CssClass, Is.EqualTo("lol")); }