public void ShouldCancelPropertyChanged()
{
var m1 = new MockObject1();
const string initialValue = "InitialValue";
m1.Text1 = initialValue;
string propertyName = null;
var notifier = new PropertyChangeNotifier(m1)
{
SynchronizationContext = new SynchronizationContextForTests()
};
notifier.PropertyChanging += (sender, args) =>
{
propertyName = args.PropertyName;
var cancelArgs = (PropertyChangingEventArgs <string>)args;
cancelArgs.Cancel();
};
bool changedEventRaised = false;
notifier.PropertyChanged += (sender, args) =>
{
if (args.PropertyName == nameof(MockObject1.Text1))
{
changedEventRaised = true;
}
};
const string p1 = "p1";
notifier.Set(nameof(MockObject1.Text1), ref m1.text1Field, p1);
Assert.AreEqual(nameof(MockObject1.Text1), propertyName);
Assert.AreEqual(initialValue, m1.Text1);
Assert.IsFalse(changedEventRaised,
"Changed event should not be raised when change was cancelled.");
}
public void ShouldRaisePropertyChangingUsingPropertyName()
{
var m1 = new MockObject1();
string propertyName = null;
var notifier = new PropertyChangeNotifier(m1)
{
SynchronizationContext = new SynchronizationContextForTests()
};
notifier.PropertyChanging += (sender, args) =>
{
propertyName = args.PropertyName;
};
const string p1 = "p1";
notifier.Set(nameof(MockObject1.Text1), ref m1.text1Field, p1);
Assert.AreEqual(nameof(MockObject1.Text1), propertyName);
Assert.AreEqual(p1, m1.Text1);
}
