public void Set()
{
ObservableList <char> collection = new ObservableList <char>();
bool propertyChanged = false;
List <string> changedProps = new List <string>();
NotifyCollectionChangedEventArgs args = null;
collection.Add('A');
collection.Add('B');
collection.Add('C');
((INotifyPropertyChanged)collection).PropertyChanged += (sender, e) =>
{
propertyChanged = true;
changedProps.Add(e.PropertyName);
};
collection.CollectionChanged += (sender, e) =>
{
args = e;
};
collection[2] = 'I';
Assert.IsTrue(propertyChanged, "SET_1");
Assert.IsTrue(changedProps.Contains("Item[]"), "SET_2");
CollectionChangedEventValidators.ValidateReplaceOperation(args, new char[] { 'C' }, new char[] { 'I' }, 2, "SET_3");
}
public void Reentrant()
{
ObservableList <char> collection = new ObservableList <char>();
bool propertyChanged = false;
List <string> changedProps = new List <string>();
NotifyCollectionChangedEventArgs args = null;
collection.Add('A');
collection.Add('B');
collection.Add('C');
PropertyChangedEventHandler pceh = (sender, e) =>
{
propertyChanged = true;
changedProps.Add(e.PropertyName);
};
// Adding a PropertyChanged event handler
((INotifyPropertyChanged)collection).PropertyChanged += pceh;
collection.CollectionChanged += (sender, e) =>
{
args = e;
};
collection.CollectionChanged += (sender, e) =>
{
// This one will attempt to break reentrancy
try
{
collection.Add('X');
Assert.Fail("Reentrancy should not be allowed.");
}
catch (InvalidOperationException)
{
}
};
collection[2] = 'I';
Assert.IsTrue(propertyChanged, "REENT_1");
Assert.IsTrue(changedProps.Contains("Item[]"), "REENT_2");
CollectionChangedEventValidators.ValidateReplaceOperation(args, new char[] { 'C' }, new char[] { 'I' }, 2, "REENT_3");
// Removing the PropertyChanged event handler should work as well:
((INotifyPropertyChanged)collection).PropertyChanged -= pceh;
}
