public static void RunTest()
{
IBindingProjectionsTesting target = (IBindingProjectionsTesting)WinRTNativeComponent.GetObjectFromNativeComponent("Component.Contracts.BindingProjectionsTesting");
using (target.InitializeXamlFrameworkForCurrentThread())
{
IBindingViewModel vm = target.CreateViewModel();
RunINotifyPropertyChangedTest(vm);
RunINotifyCollectionChangedTest(vm);
}
}
private static void RunINotifyPropertyChangedTest(IBindingViewModel viewModel)
{
bool propertyChangedEventFired = false;
INotifyPropertyChanged notifyPropertyChanged = (INotifyPropertyChanged)viewModel;
PropertyChangedEventHandler handler = (o, e) => propertyChangedEventFired = (e.PropertyName == nameof(viewModel.Name));
notifyPropertyChanged.PropertyChanged += handler;
viewModel.Name = "New Name";
Assert.IsTrue(propertyChangedEventFired);
notifyPropertyChanged.PropertyChanged -= handler;
propertyChangedEventFired = false;
viewModel.Name = "Old Name";
Assert.IsFalse(propertyChangedEventFired);
}
private static void RunINotifyCollectionChangedTest(IBindingViewModel viewModel)
{
bool notifyCollectionChangedEventFired = false;
int addedElement = 42;
viewModel.Collection.CollectionChanged += (o, e) =>
{
notifyCollectionChangedEventFired =
e.Action == NotifyCollectionChangedAction.Add &&
e.NewItems.Count == 1 &&
e.NewItems[0] is int i &&
i == addedElement;
};
viewModel.AddElement(addedElement);
Assert.IsTrue(notifyCollectionChangedEventFired);
}