public bool Equals(CollectionEvent <T> otherEvent)
{
if (otherEvent == null || _eventType != otherEvent._eventType || !ReferenceEquals(_sender, otherEvent._sender))
{
return(false);
}
switch (_eventType)
{
case Changed:
return(true);
case Cleared: {
var x = _eventArgs as ClearedEventArgs;
var y = otherEvent._eventArgs as ClearedEventArgs;
return(x != null && y != null && x.Count == y.Count && x.Full == y.Full && x.Start == y.Start);
}
case Added:
case Removed: {
var x = _eventArgs as ItemCountEventArgs <T>;
var y = otherEvent._eventArgs as ItemCountEventArgs <T>;
return(y != null && x != null && x.Count == y.Count && x.Item.IsSameAs(y.Item));
}
case Inserted:
case RemovedAt: {
var x = _eventArgs as ItemAtEventArgs <T>;
var y = otherEvent._eventArgs as ItemAtEventArgs <T>;
return(y != null && x != null && x.Index == y.Index && x.Item.IsSameAs(y.Item));
}
default:
throw new ApplicationException($"Illegal Action: {_eventType}");
}
}
public static CollectionEventConstraint <T> RaisesCollectionChangedEventFor <T>(IListenable <T> collection) => new CollectionEventConstraint <T>(collection, new[] { CollectionEvent.Changed(collection) });