public void CollectionComputingChildTest()
{
ObservableCollection <Item> items = new ObservableCollection <Item>(
new Item[]
{
new Item(0, "0"),
new Item(1, "0"),
new Item(2, "2"),
new Item(3, "3"),
new Item(4, "3"),
new Item(5, "3")
});
NotifyCollectionChangedEventArgs lastNotifyCollectionChangedEventArgs = null;
items.CollectionChanged += (sender, args) =>
{
lastNotifyCollectionChangedEventArgs = args;
};
OcConsumer consumer = new OcConsumer();
Grouping <Item, string> grouping =
items.Grouping(i => i.Value);
bool activationInProgress = true;
bool inActivationInProgress = false;
grouping.CollectionChanged += (sender, args) =>
{
Assert.AreEqual(grouping.ActivationInProgress, activationInProgress);
Assert.AreEqual(grouping.InactivationInProgress, inActivationInProgress);
if (grouping.Count >= 3)
{
Assert.AreEqual(grouping[2].ActivationInProgress, activationInProgress);
Assert.AreEqual(grouping[2].InactivationInProgress, inActivationInProgress);
}
};
grouping.For(consumer);
activationInProgress = false;
Group <Item, string> group = grouping[2];
group.DebugTag = "DebugTag";
Assert.AreEqual(group.DebugTag, "DebugTag");
Assert.IsNull(group.UserCodeIsCalledFrom);
group.Tag = "Tag";
Assert.AreEqual(group.Tag, "Tag");
Assert.IsTrue(group.IsActive);
Assert.AreEqual(group.ItemType, typeof(Item));
Assert.IsTrue(group.IsConsistent);
if (OcConfiguration.SaveInstantiationStackTrace)
{
Assert.IsNotNull(group.InstantiationStackTrace);
}
PropertyInfo newItemPropertyInfo = group.GetType().GetProperty("NewItem");
NotifyCollectionChangedAction?currentChange = null;
Item newItem = null;
int oldIndex = -1;
int newIndex = -1;
group.PreCollectionChanged += (sender, args) =>
{
Assert.AreEqual(group.CurrentChange, currentChange);
Assert.AreEqual(newItemPropertyInfo.GetValue(group), newItem);
Assert.AreEqual(group.NewItemObject, newItem);
Assert.AreEqual(group.OldIndex, oldIndex);
Assert.AreEqual(group.NewIndex, newIndex);
if (group.HandledEventArgs is NotifyCollectionChangedEventArgs)
{
Assert.AreEqual(group.HandledEventSender, items);
Assert.AreEqual(group.HandledEventArgs, lastNotifyCollectionChangedEventArgs);
}
};
group.PostCollectionChanged += (sender, args) =>
{
Assert.AreEqual(group.CurrentChange, currentChange);
Assert.AreEqual(newItemPropertyInfo.GetValue(group), newItem);
Assert.AreEqual(group.NewItemObject, newItem);
Assert.AreEqual(group.OldIndex, oldIndex);
Assert.AreEqual(group.NewIndex, newIndex);
};
currentChange = NotifyCollectionChangedAction.Add;
newItem = new Item(6, "3");
oldIndex = -1;
newIndex = 0;
items.Insert(0, newItem);
currentChange = NotifyCollectionChangedAction.Remove;
newItem = default;
oldIndex = 0;
newIndex = -1;
items.RemoveAt(3);
currentChange = NotifyCollectionChangedAction.Replace;
newItem = new Item(7, "3");
oldIndex = 0;
newIndex = 0;
items[0] = newItem;
currentChange = NotifyCollectionChangedAction.Move;
newItem = default;
oldIndex = 1;
newIndex = 2;
items.Move(3, 4);
inActivationInProgress = true;
consumer.Dispose();
}
