public void Repro3()
{
var source = new ObservableCollection <int> {
1, 2, 3
};
var scheduler = new TestScheduler();
var max = 5;
using (var trigger = new Subject <object>())
{
// ReSharper disable once AccessToModifiedClosure
using (var view = new FilteredView <int>(source, x => x < max, TimeSpan.Zero, scheduler, leaveOpen: true, triggers: trigger))
{
using (var actual = view.SubscribeAll())
{
CollectionAssert.AreEqual(new[] { 1, 2, 3 }, view);
CollectionAssert.IsEmpty(actual);
max = 2;
trigger.OnNext(null);
scheduler.Start();
var expected = new List <EventArgs>
{
CachedEventArgs.CountPropertyChanged,
CachedEventArgs.IndexerPropertyChanged,
CachedEventArgs.NotifyCollectionReset,
};
CollectionAssert.AreEqual(new[] { 1 }, view);
CollectionAssert.AreEqual(expected, actual, EventArgsComparer.Default);
source.Clear();
view.Refresh();
scheduler.Start();
CollectionAssert.IsEmpty(view);
expected.AddRange(new EventArgs[]
{
CachedEventArgs.CountPropertyChanged,
CachedEventArgs.IndexerPropertyChanged,
Diff.CreateRemoveEventArgs(1, 0),
});
CollectionAssert.AreEqual(expected, actual, EventArgsComparer.Default);
}
}
}
}
public async Task BindItemsSource()
{
var listBox = new ListBox();
var source = new ObservableCollection <int> {
1, 2, 3
};
using (var view = new FilteredView <int>(source, x => x == 2, TimeSpan.Zero, WpfSchedulers.Dispatcher, leaveOpen: true, triggers: new Subject <object>()))
{
var binding = new Binding {
Source = view,
};
BindingOperations.SetBinding(listBox, ItemsControl.ItemsSourceProperty, binding);
view.Refresh();
await Application.Current.Dispatcher.SimulateYield();
CollectionAssert.AreEqual(new[] { 2 }, listBox.Items); // Filtered
}
}
