public void TestBindingModeCommittedComposite()
{
var viewModel = new TestCompositeViewModel();
_model.Str = "Banana";
Assert.That(viewModel.Child.Text, Is.Null);
viewModel.Child.SetBinding(TestViewModel.TextProperty, new ModelBinding(_model, TestModel.StrProperty, ModelBindingMode.Committed));
Assert.That(viewModel.Child.Text, Is.EqualTo("Banana"));
_model.Str = "Strawberry";
Assert.That(viewModel.Child.Text, Is.EqualTo("Strawberry"));
var propertiesChanged = new List <string>();
_model.PropertyChanged += (o, e) => propertiesChanged.Add(e.PropertyName);
viewModel.Child.Text = "Apple";
Assert.That(_model.Str, Is.EqualTo("Strawberry"), "model should not have been updated");
Assert.That(propertiesChanged, Has.No.Member("Str"), "model should not have been updated");
viewModel.Commit();
Assert.That(_model.Str, Is.EqualTo("Apple"), "model should have been updated");
Assert.That(propertiesChanged, Has.Member("Str"), "model should have been updated");
}
public void TestBindingModeCommittedOnBeforeCommitHappensBeforeComposite()
{
var viewModel = new TestCompositeViewModel();
_model.Str = "Banana";
viewModel.Child.SetBinding(TestViewModel.TextProperty, new ModelBinding(_model, TestModel.StrProperty, ModelBindingMode.Committed));
Assert.That(viewModel.Child.Text, Is.EqualTo("Banana"));
viewModel.Child.Text = "Happy";
Assert.That(_model.Str, Is.EqualTo("Banana"), "model should not have been updated");
viewModel.Commit();
Assert.That(viewModel.Child.Text, Is.EqualTo("Sad"), "text not updated in OnBeforeCommit");
Assert.That(_model.Str, Is.EqualTo("Sad"), "model should have been updated after calling OnBeforeCommit");
}