public void LazyLoadToImgTag_ExistLoading()
        {
            const string html   = @"<p>Work 996 and have some fu bao!</p><img loading=""lazy"" src=""icu.jpg"" /><video src=""java996.mp4""></video>";
            var          result = ContentProcessor.AddLazyLoadToImgTag(html);

            Assert.IsTrue(result == @"<p>Work 996 and have some fu bao!</p><img loading=""lazy"" src=""icu.jpg"" /><video src=""java996.mp4""></video>");
        }
        public void LazyLoadToImgTag_Empty()
        {
            var result = ContentProcessor.AddLazyLoadToImgTag(string.Empty);

            Assert.IsTrue(result == string.Empty);
        }