public void Board_Method()
        {
            Assert.Throws <ArgumentNullException>(() => IPinterestHtmlHelperExtensions.Board(null, widget => { }));
            Assert.Throws <ArgumentNullException>(() => new PinterestHtmlHelper().Board(null));

            Assert.Equal(new PinterestHtmlHelper().Board().ToHtmlString(), new CackleHtmlHelper().Comments(x => { }));
            Assert.Equal(new PinterestHtmlHelper().Board().Account("account").Id("id").ToHtmlString(), new PinterestHtmlHelper().Board(x => x.Account("account").Id("id")));
        }