public void Freeze()
{
//Arrange.
ObservableCollectionEx <object> collection = new ObservableCollectionEx <object>();
CollectionChangedHandler handler = SetupNotifyCollectionChangedHandler(collection);
//Act.
collection.FreezeCollectionNotifications();
collection.Add(new object());
//Assert.
Assert.That(handler.EventCount == 0, $"CollectionChanged event was raised {handler.EventCount} time(s) when it was allegedly frozen.");
}
public void CollectionChangedDetectionWhileFrozen()
{
//Arrange.
ObservableCollectionEx <object> collection = new ObservableCollectionEx <object>();
CollectionChangedHandler handler = SetupNotifyCollectionChangedHandler(collection);
//Act.
collection.FreezeCollectionNotifications();
collection.Add(new object());
//Assert.
Assert.That(collection.CollectionChangedWhileFrozen, $"The collection changed while frozen but the change was not reported in the {nameof(ObservableCollectionEx<object>.CollectionChangedWhileFrozen)} property.");
}
public void AutoFireCollectionChangedOnUnfreeze()
{
//Arrange.
ObservableCollectionEx <object> collection = new ObservableCollectionEx <object>();
CollectionChangedHandler handler = SetupNotifyCollectionChangedHandler(collection);
//Act.
collection.FreezeCollectionNotifications();
collection.Add(new object());
collection.UnfreezeCollectionNotifications();
//Assert.
Assert.That(handler.EventCount == 1, $"CollectionChanged event was raised {handler.EventCount} time(s) when the count was expected to be 1.");
}
public void Direct()
{
CollectionChangedHandler <int> cch;
ItemsAddedHandler <int> iah;
ItemsRemovedHandler <int> irh;
Assert.AreEqual(EventTypeEnum.None, queue.ActiveEvents);
queue.CollectionChanged += (cch = new CollectionChangedHandler <int>(queue_CollectionChanged));
Assert.AreEqual(EventTypeEnum.Changed, queue.ActiveEvents);
queue.ItemsAdded += (iah = new ItemsAddedHandler <int>(queue_ItemAdded));
Assert.AreEqual(EventTypeEnum.Changed | EventTypeEnum.Added, queue.ActiveEvents);
queue.ItemsRemoved += (irh = new ItemsRemovedHandler <int>(queue_ItemRemoved));
Assert.AreEqual(EventTypeEnum.Changed | EventTypeEnum.Added | EventTypeEnum.Removed, queue.ActiveEvents);
queue.Add(34);
queue.Add(56);
queue.AddAll(new int[] { });
queue.Add(34);
queue.Add(12);
queue.DeleteMax();
queue.DeleteMin();
queue.AddAll(new int[] { 4, 5, 6, 2 });
Assert.AreEqual(17, events.Count);
int[] vals = { 34, 0, 56, 0, 34, 0, 12, 0, 56, 0, 12, 0, 4, 5, 6, 2, 0 };
Acts[] acts =
{
Acts.Add, Acts.Changed, Acts.Add, Acts.Changed, Acts.Add, Acts.Changed, Acts.Add, Acts.Changed,
Acts.Remove, Acts.Changed, Acts.Remove, Acts.Changed, Acts.Add, Acts.Add, Acts.Add, Acts.Add,
Acts.Changed
};
for (var i = 0; i < vals.Length; i++)
{
//Console.WriteLine("{0}", events[cell]);
Assert.AreEqual(acts[i], events[i].Key, "Action " + i);
Assert.AreEqual(vals[i], events[i].Value, "Value " + i);
}
queue.CollectionChanged -= cch;
Assert.AreEqual(EventTypeEnum.Added | EventTypeEnum.Removed, queue.ActiveEvents);
queue.ItemsAdded -= iah;
Assert.AreEqual(EventTypeEnum.Removed, queue.ActiveEvents);
queue.ItemsRemoved -= irh;
Assert.AreEqual(EventTypeEnum.None, queue.ActiveEvents);
}
public void Direct()
{
CollectionChangedHandler<int> cch;
ItemsAddedHandler<int> iah;
ItemsRemovedHandler<int> irh;
Assert.AreEqual(EventTypeEnum.None, queue.ActiveEvents);
queue.CollectionChanged += (cch = new CollectionChangedHandler<int>(queue_CollectionChanged));
Assert.AreEqual(EventTypeEnum.Changed, queue.ActiveEvents);
queue.ItemsAdded += (iah = new ItemsAddedHandler<int>(queue_ItemAdded));
Assert.AreEqual(EventTypeEnum.Changed | EventTypeEnum.Added, queue.ActiveEvents);
queue.ItemsRemoved += (irh = new ItemsRemovedHandler<int>(queue_ItemRemoved));
Assert.AreEqual(EventTypeEnum.Changed | EventTypeEnum.Added | EventTypeEnum.Removed, queue.ActiveEvents);
queue.Add(34);
queue.Add(56);
queue.AddAll<int>(new int[] { });
queue.Add(34);
queue.Add(12);
queue.DeleteMax();
queue.DeleteMin();
queue.AddAll<int>(new int[] { 4, 5, 6, 2 });
Assert.AreEqual(17, events.Count);
int[] vals = { 34, 0, 56, 0, 34, 0, 12, 0, 56, 0, 12, 0, 4, 5, 6, 2, 0 };
Acts[] acts = { Acts.Add, Acts.Changed, Acts.Add, Acts.Changed, Acts.Add, Acts.Changed, Acts.Add, Acts.Changed,
Acts.Remove, Acts.Changed, Acts.Remove, Acts.Changed, Acts.Add, Acts.Add, Acts.Add, Acts.Add, Acts.Changed };
for (int i = 0; i < vals.Length; i++)
{
//Console.WriteLine("{0}", Events[cell]);
Assert.AreEqual(acts[i], events[i].Key, "Action " + i);
Assert.AreEqual(vals[i], events[i].Value, "Value " + i);
}
queue.CollectionChanged -= cch;
Assert.AreEqual(EventTypeEnum.Added | EventTypeEnum.Removed, queue.ActiveEvents);
queue.ItemsAdded -= iah;
Assert.AreEqual(EventTypeEnum.Removed, queue.ActiveEvents);
queue.ItemsRemoved -= irh;
Assert.AreEqual(EventTypeEnum.None, queue.ActiveEvents);
}
/// <summary>
/// Initializes the new instance and adds the specified <paramref name="handler"/>
/// to the <see cref="CollectionChanged"/> event.
/// </summary>
/// <param name="handler">Handler to add</param>
public CollectionListenerAdapter(CollectionChangedHandler handler)
{
CollectionChanged += handler ?? throw new ArgumentNullException(nameof(handler));
}
