public async Task World_can_add_collection_of_realms() { // Arrange var world = new MudWorld(Mock.Of <IRealmFactory>()); var realms = new List <IRealm>() { Mock.Of <IRealm>(r => r.Name == "R1"), Mock.Of <IRealm>(r => r.Name == "R2") }; // Act await world.AddRealmsToWorld(realms); // Assert Assert.AreEqual(2, world.GetRealmsInWorld().Count()); }