public void WorldObjectIsEnumerable()
        {
            var list        = new WorldObjectList <IWorldObject>();
            var mockObjects = new List <IWorldObject>();

            mockObjects.Add(new Mock <IWorldObject>().Object);
            mockObjects.Add(new Mock <IWorldObject>().Object);
            list.AddRange(mockObjects);

            Assert.AreEqual(2, list.Count());
        }