public void MovingItemsIntoCollectionManuallyThrows()
{
var source = new Subject<Thing>();
var col = new TrackingCollection<Thing>(source) { ProcessingDelay = TimeSpan.Zero };
var count = 0;
var expectedCount = 2;
var evt = new ManualResetEvent(false);
col.Subscribe(t =>
{
if (++count == expectedCount)
evt.Set();
}, () => { });
Add(source, GetThing(1, 1));
Add(source, GetThing(2, 2));
evt.WaitOne();
evt.Reset();
Assert.Throws<InvalidOperationException>(() => col.Move(0, 1));
col.Dispose();
}