public void should_return_last_if_recently_completed()
        {
            var fakeNotification = new ProgressNotification("Title");
            _notificationProvider.Register(fakeNotification);
            fakeNotification.Dispose();

            _notificationProvider.GetCurrent().Should().Be(fakeNotification);
        }
        public void should_return_null_if_completed_long_time_ago()
        {
            var fakeNotification = new ProgressNotification("Title");
            _notificationProvider.Register(fakeNotification);
            fakeNotification.Dispose();

            Thread.Sleep(7000);

            _notificationProvider.GetCurrent().Should().BeNull();
        }