public void Share_Method()
        {
            Assert.Throws <ArgumentNullException>(() => ITumblrHtmlHelperExtensions.ShareButton(null, widget => { }));
            Assert.Throws <ArgumentNullException>(() => new TumblrHtmlHelper().ShareButton(null));

            Assert.Equal(new TumblrHtmlHelper().ShareButton().ToHtmlString(), new TumblrHtmlHelper().ShareButton(x => { }));
            Assert.Equal(new TumblrHtmlHelper().ShareButton().Type(TumblrShareButtonType.First).ToHtmlString(), new TumblrHtmlHelper().ShareButton(x => x.Type(TumblrShareButtonType.First)));
        }
        public void FollowButton_Method()
        {
            Assert.Throws <ArgumentNullException>(() => ITumblrHtmlHelperExtensions.FollowButton(null, widget => { }));
            Assert.Throws <ArgumentNullException>(() => new TumblrHtmlHelper().FollowButton(null));

            Assert.Equal(new TumblrHtmlHelper().FollowButton().ToHtmlString(), new TumblrHtmlHelper().FollowButton(x => { }));
            Assert.Equal(new TumblrHtmlHelper().FollowButton().Account("account").ToHtmlString(), new TumblrHtmlHelper().FollowButton(x => x.Account("account")));
        }