public void Pin_Method()
{
Assert.Throws <ArgumentNullException>(() => IPinterestHtmlHelperExtensions.Pin(null, widget => { }));
Assert.Throws <ArgumentNullException>(() => new PinterestHtmlHelper().Pin(null));
Assert.Equal(new PinterestHtmlHelper().Pin().ToHtmlString(), new PinterestHtmlHelper().Pin(x => { }));
Assert.Equal(new PinterestHtmlHelper().Pin().Id("id").ToHtmlString(), new PinterestHtmlHelper().Pin(x => x.Id("id")));
}
