private void _ChangeSlideBeingDisplayed([NotNull] Slide nextSlide)
{
var oldSlide = _machine.CurrentSlide;
_machine.ShowSlide(nextSlide);
_machine.ControlMaker.Deflate(oldSlide);
}
public async Task ShowingASlide_Should_SendPropertyChangeNotifications()
{
_testSubject.CurrentPageType = typeof(object);
_testSubject.MonitorEvents();
_testSubject.ShowSlide(new Slide(new _ImageLoaderHardCoded()));
_testSubject.ShouldRaisePropertyChangeFor(m => m.CurrentPageType);
_testSubject.ShouldRaisePropertyChangeFor(m => m.CurrentSlide);
_testSubject.CurrentPageType.Should()
.Be(typeof(PresentationPlayingPage));
}