public void OAPHShouldFireChangeNotifications()
        {
            var input = new[] {1, 2, 3, 3, 4}.ToObservable();
            var output = new List<int>();

            (new TestScheduler()).With(sched => {
                var fixture = new ObservableAsPropertyHelper<int>(input,
                    x => output.Add(x), -5);

                sched.Start();

                Assert.Equal(input.Last(), fixture.Value);

                // Note: Why doesn't the list match the above one? We're supposed
                // to suppress duplicate notifications, of course :)
                (new[] { -5, 1, 2, 3, 4 }).AssertAreEqual(output);
            });
        }