public void TestModelPropertyChanged()
{
ModelPropertyChangedEventArgs args = null;
_model.AddPropertyChangedHandler(TestClass.StrProperty, (o, e) => args = e);
_model.Str = "Default";
Assert.That(args, Is.Null);
_model.Str = "Test";
Assert.That(args, Is.Not.Null);
Assert.That(args.Property, Is.EqualTo(TestClass.StrProperty));
Assert.That(args.OldValue, Is.EqualTo("Default"));
Assert.That(args.NewValue, Is.EqualTo("Test"));
args = null;
_model.Str = "Test";
Assert.That(args, Is.Null);
_model.Str = "Test2";
Assert.That(args, Is.Not.Null);
Assert.That(args.Property, Is.EqualTo(TestClass.StrProperty));
Assert.That(args.OldValue, Is.EqualTo("Test"));
Assert.That(args.NewValue, Is.EqualTo("Test2"));
_model.Str = "Default";
Assert.That(args, Is.Not.Null);
Assert.That(args.Property, Is.EqualTo(TestClass.StrProperty));
Assert.That(args.OldValue, Is.EqualTo("Test2"));
Assert.That(args.NewValue, Is.EqualTo("Default"));
}
public void TestAddPropertyChangedHandler()
{
bool handled = false;
EventHandler <ModelPropertyChangedEventArgs> handler = (o, e) => { handled = true; };
_model.AddPropertyChangedHandler(TestClass.IntegerProperty, handler);
_model.Integer = 99;
Assert.That(handled, Is.True, "handler not called");
handled = false;
_model.Integer = 12;
Assert.That(handled, Is.True, "handler not called second time");
handled = false;
_model.Str = "Banana";
Assert.That(handled, Is.False, "handler called for different property");
Assert.That(handler, Is.Not.Null, "handler released");
}
