Ravendb facets on list values

ravenfacets

    public class FacetTest : RavenTestBase 
    {
        [Fact]
        public void CanFacetOnList()
        {
            using (var store = NewDocumentStore())
            {
                new BlogIndex().Execute(store);

                var facets = new List<Facet>{
                    new Facet{Name = "Tags", TermSortMode= FacetTermSortMode.HitsDesc}
                };

                using (var session = store.OpenSession())
                {
                    session.Store(new FacetSetup() { Facets = facets, Id = "facets/BlogFacets" });

                    var post1 = new BlogPost
                    {
                        Title = "my first blog",
                        Tags = new List<string>() { "news", "funny" }
                    };
                    session.Store(post1);

                    var post2 = new BlogPost
                    {
                        Title = "my second blog",
                        Tags = new List<string>() { "lame", "news" }
                    };
                    session.Store(post2);
                    session.SaveChanges();
                }

                using (var session = store.OpenSession())
                {
                    var q = session.Query<BlogPost, BlogIndex>()
                        .Customize(x => x.WaitForNonStaleResults());

                    var f = q.ToFacets("facets/BlogFacets");

                    Assert.Equal(1,f.Results.Count);
                    Assert.Equal(2, f.Results["Tags"].Values.Count);
                    Assert.Equal("news", f.Results["Tags"].Values[0].Range);
                    Assert.Equal(2, f.Results["Tags"].Values[0].Hits);
                    
                }

            }
        }

    }

    public class BlogPost
    {
        public string Title { get; set; }
        public List<string> Tags { get; set; }
    }

    public class BlogIndex : AbstractIndexCreationTask<BlogPost>
    {
        public BlogIndex()
        {
            Map = blogs => from b in blogs
                           select new
                           {
                               Tags = b.Tags
                           };
            Store("Tags", Raven.Abstractions.Indexing.FieldStorage.Yes);
            Index("Tags", Raven.Abstractions.Indexing.FieldIndexing.NotAnalyzed);
        }

    }