public void Result_is_updated_after_Replace()
{
var subject = new ObservableCollection <int>(new [] { 10, 11, 12, 11, 12, 10, 12, 17 });
var result = subject.ToQueryable().Distinct().ToObservable();
Assert.IsInstanceOfType(result, typeof(IQueryableObservableCollection <int>));
var events = new List <NotifyCollectionChangedEventArgs>();
result.CollectionChanged += (s, e) => events.Add(e);
subject[0] = 13;
EnumerableAssert.AreEqual(result, 13, 11, 12, 10, 17);
Assert.AreEqual(2, events.Count);
subject[0] = 13;
EnumerableAssert.AreEqual(result, 13, 11, 12, 10, 17);
Assert.AreEqual(2, events.Count);
subject[1] = 12;
EnumerableAssert.AreEqual(result, 13, 12, 11, 10, 17);
Assert.AreEqual(3, events.Count);
}
