public class SearchViewModel : ViewModelBase
    {
        private string _searchTerm;
        private ReactiveList<string> _searchResults = new ReactiveList<string>();

        public SearchViewModel()
        {
            ExecuteSearch = ReactiveCommand.CreateAsyncTask((o, ct) => DoSearchAsync(ct));
            this.ObservableForProperty(n => n.SearchTerm, (term) =>
            {
                return !String.IsNullOrWhiteSpace(term) && term.Length > 3;
            }).DistinctUntilChanged().Throttle(TimeSpan.FromMilliseconds(300),RxApp.MainThreadScheduler).Subscribe(
                                    b => ExecuteSearch.Execute(b));
            ExecuteSearch.Subscribe(list =>
            {
                _searchResults.Clear();
                _searchResults = list;
                NotifyOfPropertyChange(() => SearchResults);
            });
        }

        public ReactiveList<string> SearchResults
        {
            get { return _searchResults; }
        }


        private async Task<ReactiveList<string>> DoSearchAsync(CancellationToken ct)
        {
            //throw new NotImplementedException();
            return new ReactiveList<string> { "a", "b", "c" };
        }


        public IReactiveCommand<ReactiveList<string>> ExecuteSearch { get; protected set; }

        public string SearchTerm
        {
            get { return _searchTerm; }
            set { this.RaiseAndSetIfChanged(ref _searchTerm, value); }
        }
    }




///////////////TEST
public class SearchViewModelTests :TestBase
    {
        //private SearchViewModel _viewModel;

        //[TestInitialize]
        //public void Setup()
        //{
        //    _viewModel = new SearchViewModel();
        //}

        [TestMethod]
        public void SearchIs()
        {
            (new TestScheduler()).With(s =>
            {
                var _viewModel = getViewModel();
                    _viewModel.SearchTerm = "q123wer";
                Assert.AreEqual(0, _viewModel.SearchResults.Count);
                s.AdvanceByMs(310);
                Assert.AreEqual(3, _viewModel.SearchResults.Count);
            });
        }

        private SearchViewModel getViewModel()
        {
            return MinicabsterKernel.Instance.Get<SearchViewModel>();
        }

    }