public void When_PropertyChanged_Suppressed_Then_NotifyPropertyChanged_Does_Not_Fire_PropertyChanged()
        {
            // Arrange
            var eventCount = 0;
            var sut = new PropertyChangeHelper(this);
            sut.PropertyChanged += (sender, args) => ++eventCount;

            // Act
            using (sut.SuppressPropertyChanged())
                sut.NotifyPropertyChanged("Age", "UserData-1");

            // Assert
            Assert.AreEqual(0, eventCount);
        }
        public void When_NotifyPropertyValueChanged_Then_Fires_PropertyChange_On_Event_With_Correct_Values()
        {
            // Arrange
            var propertyChanges = new List<PropertyChangedEventArgsEx>();
            var sut = new PropertyChangeHelper(this);
            sut.PropertyChanged += (sender, args) => propertyChanges.Add((PropertyChangedEventArgsEx) args);
            var expectedPropertyChange = new PropertyChangedEventArgsEx("Age", "UserData-2");

            // Act
            sut.NotifyPropertyChanged("Age", "UserData-2");

            // Assert
            Assert.AreEqual(1, propertyChanges.Count);
            Assert.AreEqual(expectedPropertyChange, propertyChanges[0]);
        }