public void ShouldInstantiateAViewModelWithoutNotification()
{
bool notified = false;
var viewModel = new ImprovedViewModel();
viewModel.PropertyChanged += (s, e) => notified = true;
Assert.That(notified, Is.False);
Assert.That(viewModel.Label, Is.EqualTo(""));
}
public void ShouldNotNotifyIfTheValueHasntActuallyChanged()
{
// Arrange
bool notified = false;
// System under Test
var viewModel = new ImprovedViewModel { Label = "Nostromo" };
viewModel.PropertyChanged += (s, e) => notified = true;
// Act
viewModel.Label = "Nostromo";
// Assert
Assert.That(notified, Is.False);
Assert.That(viewModel.Label, Is.EqualTo("Nostromo"));
}
public void ShouldNotifyMeAboutTheChangeOfValue()
{
// Arrange
bool notified = false;
// System under Test
var viewModel = new ImprovedViewModel();
viewModel.PropertyChanged += (s, e) => notified = true;
// Act
viewModel.Label = "Nostromo";
// Assert
Assert.That(notified, Is.True);
Assert.That(viewModel.Label, Is.EqualTo("Nostromo"));
}
