public void BigList()
{
var generator = new RandomPersonGenerator();
var people = generator.Take(10000).ToArray();
_source.AddRange(people);
Console.WriteLine();
}
public void CountChangedShouldReflectContentsOfCacheInvokeUponeSubscription()
{
var generator = new RandomPersonGenerator();
int? result = null;
var subscription = _source.CountChanged
.Subscribe(count => result = count);
_source.AddOrUpdate(generator.Take(100));
Assert.IsTrue(result.HasValue, "Count has not been invoked. Should start at zero");
Assert.AreEqual(100, result.Value, "Count should be 100");
subscription.Dispose();
}