public async Task Add_to_projected_list()
{
var list = new ListReactiveCollectionSource<int>();
var projectedList = list.ReactiveCollection
.Select(x => x.ToString(CultureInfo.InvariantCulture));
var notificationsTask = projectedList.Changes
.Take(4)
.ToArray()
.ToTask();
list.Add(1);
list.Add(2);
list.Add(3);
var notifications = await notificationsTask;
notifications[0].Index.Should().NotHaveValue();
notifications[1].Index.Should().Be(0);
notifications[2].Index.Should().Be(1);
notifications[3].Index.Should().Be(2);
notifications[0].Action.Should().Be(NotifyCollectionChangedAction.Reset);
notifications[1].Action.Should().Be(NotifyCollectionChangedAction.Add);
notifications[2].Action.Should().Be(NotifyCollectionChangedAction.Add);
notifications[3].Action.Should().Be(NotifyCollectionChangedAction.Add);
notifications[0].NewItems.Should().BeEmpty();
notifications[1].NewItems.Should().Equal("1");
notifications[2].NewItems.Should().Equal("2");
notifications[3].NewItems.Should().Equal("3");
}
public async Task RemoveAt()
{
var list = new ListReactiveCollectionSource <int>();
var notificationTask = list.ReactiveCollection.Changes
.Skip(3)
.FirstAsync()
.ToTask();
list.Add(1);
list.Add(2);
list.RemoveAt(1);
await Verify(notificationTask);
}
public async Task RemoveAt()
{
var list = new ListReactiveCollectionSource <int>();
var notificationTask = list.ReactiveCollection.Changes
.Skip(3)
.FirstAsync()
.ToTask();
list.Add(1);
list.Add(2);
list.RemoveAt(1);
var notification = await notificationTask;
notification.Index.Should().Be(1);
notification.Action.Should().Be(NotifyCollectionChangedAction.Remove);
notification.NewItems.Should().BeEmpty();
notification.OldItems.Should().Equal(2);
notification.Current.Should().Equal(1);
}
public async Task InsertRange()
{
var list = new ListReactiveCollectionSource <int>();
var notificationTask = list.ReactiveCollection.Changes
.Skip(2)
.FirstAsync()
.ToTask();
list.Add(1);
var range = new[] { 1, 2, 3 };
list.InsertRange(1, range);
await Verify(notificationTask);
}
public async Task Add()
{
var list = new ListReactiveCollectionSource<int>();
var notificationTask = list.ReactiveCollection.Changes
.Skip(1)
.FirstAsync()
.ToTask();
list.Add(1);
var notification = await notificationTask;
notification.Index.Should().Be(0);
notification.Action.Should().Be(NotifyCollectionChangedAction.Add);
notification.NewItems.Should().Equal(1);
notification.OldItems.Should().BeEmpty();
notification.Current.Should().Equal(1);
}
public async Task Clear()
{
var list = new ListReactiveCollectionSource <int>();
var notificationTask = list.ReactiveCollection.Changes
.Skip(2)
.FirstAsync()
.ToTask();
list.Add(1);
list.Clear();
var notification = await notificationTask;
notification.Index.Should().NotHaveValue();
notification.Action.Should().Be(NotifyCollectionChangedAction.Reset);
notification.NewItems.Should().BeEmpty();
notification.OldItems.Should().BeEmpty();
notification.Current.Should().BeEmpty();
}
public async Task InsertRange()
{
var list = new ListReactiveCollectionSource <int>();
var notificationTask = list.ReactiveCollection.Changes
.Skip(2)
.FirstAsync()
.ToTask();
list.Add(1);
var range = new[] { 1, 2, 3 };
list.InsertRange(1, range);
var notification = await notificationTask;
notification.Index.Should().Be(1);
notification.Action.Should().Be(NotifyCollectionChangedAction.Add);
notification.NewItems.Should().Equal(1, 2, 3);
notification.OldItems.Should().BeEmpty();
notification.Current.Should().Equal(1, 1, 2, 3);
}
public async Task Add_to_sorted_list_with_Changes()
{
var list = new ListReactiveCollectionSource<int>();
var projectedList = list
.ReactiveCollection
.Sort();
var notificationTask = projectedList.Changes
.Skip(3)
.FirstAsync()
.ToTask();
list.Add(3);
list.Add(1);
list.Add(2);
var notification = await notificationTask;
notification.Action.Should().Be(NotifyCollectionChangedAction.Add);
notification.NewItems.Should().Equal(2);
notification.Current.Should().Equal(1, 2, 3);
}
public async Task Add_to_filtered_list()
{
var list = new ListReactiveCollectionSource<int>();
var projectedList = list
.ReactiveCollection
.Where(x => x % 2 == 0);
var notificationTask = projectedList.Changes
.Skip(1)
.FirstAsync()
.ToTask();
list.Add(1);
list.Add(3);
list.Add(2);
var notification = await notificationTask;
notification.Index.Should().Be(0);
notification.Action.Should().Be(NotifyCollectionChangedAction.Add);
notification.NewItems.Should().Equal(2);
}
public async Task Where_after_Where_behaves_correctly()
{
var list = new ListReactiveCollectionSource<int>();
var changesTask = list.ReactiveCollection
.Where(x => x % 2 == 0)
.Where(x => x % 3 == 0)
.Changes
.Take(3)
.ToArray()
.ToTask();
list.Add(1);
list.Add(2);
list.Add(3);
list.Add(6);
list.Remove(1);
list.Remove(2);
list.Remove(3);
list.Remove(6);
var changes = await changesTask;
changes[0].Action.Should().Be(NotifyCollectionChangedAction.Reset);
changes[1].Action.Should().Be(NotifyCollectionChangedAction.Add);
changes[1].Current.Should().Equal(6);
changes[2].Action.Should().Be(NotifyCollectionChangedAction.Remove);
changes[2].Current.Should().BeEmpty();
}
public async Task Select_after_Where_behaves_correctly()
{
var list = new ListReactiveCollectionSource<int>();
var changesTask = list.ReactiveCollection
.Where(x => x % 2 == 0)
.Select(x => x.ToString(CultureInfo.InvariantCulture))
.Changes
.Take(6)
.ToArray()
.ToTask();
list.Add(1);
list.Add(2);
list.Remove(2);
list.Remove(1);
list.Add(4);
list.Insert(0, 2);
list[0] = 3;
var changes = await changesTask;
changes[0].Action.Should().Be(NotifyCollectionChangedAction.Reset);
changes[1].Action.Should().Be(NotifyCollectionChangedAction.Add);
changes[1].Current.Should().Equal("2");
changes[2].Action.Should().Be(NotifyCollectionChangedAction.Remove);
changes[3].Action.Should().Be(NotifyCollectionChangedAction.Add);
changes[3].Current.Should().Equal("4");
changes[4].Action.Should().Be(NotifyCollectionChangedAction.Add);
changes[4].Current.Should().Equal("4", "2");
changes[4].Index.Should().Be(1);
changes[5].Action.Should().Be(NotifyCollectionChangedAction.Remove);
changes[5].Index.Should().Be(1);
changes[5].Index.Should().Be(1);
changes[5].Current.Should().Equal("4");
}
public async Task Concat_Add_Delayed()
{
var source1 = new ListReactiveCollectionSource<int>();
var source2 = new ListReactiveCollectionSource<int>();
source1.Add(1);
source2.Add(2);
var concat = source1.ReactiveCollection.Concat(source2.ReactiveCollection);
var notification = await concat.Changes
.FirstAsync()
.ToTask();
notification.Action.Should().Be(NotifyCollectionChangedAction.Reset);
notification.Current.Should().Equal(1, 2);
}
public async Task Concat_Clear()
{
var source1 = new ListReactiveCollectionSource<int>();
var source2 = new ListReactiveCollectionSource<int>();
var concat = source1.ReactiveCollection.Concat(source2.ReactiveCollection);
var notificationsTask = concat.Changes
.Skip(2)
.Take(3)
.ToArray()
.ToTask();
source1.Add(1);
source2.Add(2);
source1.Clear();
source2.Clear();
var notifications = await notificationsTask;
notifications.Should().HaveCount(3);
notifications[0].Current.Should().Equal(1, 2);
notifications[1].Action.Should().Be(NotifyCollectionChangedAction.Remove);
notifications[1].Index.Should().Be(0);
notifications[1].OldItems.Should().Equal(1);
notifications[1].Current.Should().Equal(2);
notifications[2].Action.Should().Be(NotifyCollectionChangedAction.Remove);
notifications[2].Index.Should().Be(0);
notifications[2].OldItems.Should().Equal(2);
notifications[2].Current.Should().BeEmpty();
}
public async Task SortedSet_ToObservableCollection_does_not_raise_events_on_event_subscription()
{
var list = new ListReactiveCollectionSource<int> { 1, 2, 3 };
var observableCollection = (INotifyCollectionChanged)list.ReactiveCollection.ToObservableCollection();
var eventsTask = Observable
.FromEventPattern<NotifyCollectionChangedEventHandler, NotifyCollectionChangedEventArgs>(eh => observableCollection.CollectionChanged += eh, eh => observableCollection.CollectionChanged -= eh)
.Select(x => x.EventArgs)
.FirstAsync()
.ToTask();
((ICollection)observableCollection).Should().Equal(1, 2, 3);
list.Add(4);
var ev = await eventsTask;
ev.Action.Should().Be(NotifyCollectionChangedAction.Add);
ev.NewItems.Should().Equal(4);
((ICollection)observableCollection).Should().Equal(1, 2, 3, 4);
}
public async Task List_ToObservableCollection_Replace()
{
var list = new ListReactiveCollectionSource<int>();
var observableCollection = (INotifyCollectionChanged)list.ReactiveCollection.ToObservableCollection();
var eventsTask = Observable
.FromEventPattern<NotifyCollectionChangedEventHandler, NotifyCollectionChangedEventArgs>(eh => observableCollection.CollectionChanged += eh, eh => observableCollection.CollectionChanged -= eh)
.Take(3)
.Select(x => x.EventArgs)
.ToArray()
.ToTask();
list.Add(1);
list.Add(2);
list.Replace(1, 3);
var events = await eventsTask;
events[0].Action.Should().Be(NotifyCollectionChangedAction.Add);
events[1].Action.Should().Be(NotifyCollectionChangedAction.Add);
events[2].Action.Should().Be(NotifyCollectionChangedAction.Replace);
events[2].OldItems.Should().Equal(1);
events[2].NewItems.Should().Equal(3);
((ICollection)observableCollection).Should().Equal(3, 2);
}