CatalogOfFreeContent.Common.Catalog.UpdateContent C# (CSharp) Méthode

        public int UpdateContent(string oldUrl, string newUrl)
        {
            IList<IContent> matchedElements = this.urls[oldUrl].ToList();
            foreach (ContentItem content in matchedElements)
            {
                content.Url = newUrl;
            }

            this.urls.Remove(oldUrl);
            this.urls.AddMany(newUrl, matchedElements);
        
            return matchedElements.Count;
        }
    }

        public void UpdateUpdatedElementTest()
        {
            Catalog catalog = new Catalog();
            List<string[]> contentItemParams = new List<string[]>() 
            {
                new string[] { "Firefox v.11.0", "Mozilla", "16148072", "http://www.mozilla.org" },
                new string[] { "One", "Metallica", "8771120", "http://goo.gl/dIkth7gs" },
                new string[] { "Intro C#", "S.Nakov", "12763892", "http://www.introprogramming.info" },
                new string[] { "The Secret", "Drew Heriot, Sean Byrne & others (2006)", "832763834", "http://t.co/dNV4d" }
            };

            IContent application = new ContentItem(ContentType.Application, contentItemParams[0]);
            IContent song = new ContentItem(ContentType.Song, contentItemParams[1]);
            IContent book = new ContentItem(ContentType.Book, contentItemParams[2]);
            IContent movie = new ContentItem(ContentType.Movie, contentItemParams[3]);
            catalog.Add(application);
            catalog.Add(application);
            catalog.Add(song);
            catalog.Add(book);
            catalog.Add(book);
            catalog.Add(movie);
            catalog.Add(movie);

            int updatedItemsCount = catalog.UpdateContent("http://www.introprogramming.info", "http://newUrl.org");
            Assert.AreEqual(2, updatedItemsCount);

            updatedItemsCount = catalog.UpdateContent("http://newUrl.org", "http://www.introprogramming.info");
            Assert.AreEqual(2, updatedItemsCount);
        }