public void Adding_duplicate_item_to_the_ObservableCollection_adds_duplicate_to_the_binding_list()
{
var item = new ListElement(4);
var oc = new ObservableCollection <ListElement> {
3, 1, item, 1, 5, 9
};
var obbl = new ObservableBackedBindingList <ListElement>(oc);
oc.Add(item);
Assert.Equal(7, obbl.Count);
Assert.Equal(2, obbl.Count(i => ReferenceEquals(i, item)));
}
public void Adding_duplicate_item_to_the_ObservableHashSet_is_ignored()
{
var item = new ListElement(4);
var oc = new ObservableHashSet <ListElement> {
3, 1, item, 1, 5, 9
};
var obbl = new ObservableBackedBindingList <ListElement>(oc);
oc.Add(item);
Assert.Equal(6, obbl.Count);
Assert.Equal(1, obbl.Count(i => ReferenceEquals(i, item)));
}
