public void NotifyPropertyChanged()
{
_propertiesChanged = new List<string>();
var viewModel = new MockViewModel();
var propertyName = Guid.NewGuid().ToString();
viewModel.PropertyChanged += PropertyChanged;
viewModel.TriggerPropertyChanged(propertyName);
viewModel.PropertyChanged -= PropertyChanged;
Assert.AreEqual(1, _propertiesChanged.Count);
Assert.IsTrue(_propertiesChanged.Contains(propertyName));
}