public void FetchListCache_PackagesChangeEventIsPropagated()
        {
            var wasCalled = false;

            OnPackagesChangeEvent = (filter, packages, selected) =>
            {
                wasCalled = true;
            };

            Collection.OnPackagesChanged += OnPackagesChangeEvent;
            Factory.Packages              = PackageSets.Instance.Many(5);
            Collection.FetchListCache(true);

            Assert.IsTrue(wasCalled);
        }