public void Result_is_updated_after_Remove()
{
var subject = new ObservableCollection <int>(new [] { 0, 1, 2, 1, 2, 0, 2, 7 });
var result = subject.ToQueryable().Distinct().ToObservable();
Assert.IsInstanceOfType(result, typeof(IQueryableObservableCollection <int>));
subject.Remove(0);
EnumerableAssert.AreEqual(result, 1, 2, 0, 7);
subject.Remove(0);
EnumerableAssert.AreEqual(result, 1, 2, 7);
subject.Remove(7);
EnumerableAssert.AreEqual(result, 1, 2);
}
public void Switches_to_new_observable()
{
var subject1 = new ObservableCollection <int>(new[] { 11, 12, 13, 14, 15, 16 });
var subject2 = new ObservableCollection <int>(new[] { 13, 14, 15, 16, 17, 18 });
var observer = new ObserverCollection <int>();
observer.Observe(subject1);
EnumerableAssert.AreEqual(subject1, observer);
subject1.Insert(3, 77);
EnumerableAssert.AreEqual(subject1, observer);
observer.Observe(subject2);
EnumerableAssert.AreEqual(subject2, observer);
subject2.Insert(3, 77);
EnumerableAssert.AreEqual(subject2, observer);
}
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);
}