public void GetOnlineUsersByRoom()
        {
            // Set user status and add two users to the repository
            user1.Status = 0;  // This evaluates to the UserStaus enum value "Active"
            _repository.Add(user1);
            user2.Status = 2;  // This evaluates to the UserStaus enum value "Offline"
            _repository.Add(user2);

            // Set the creator key for the chat room and add it to the repository
            room1.CreatorId = _repository.Users.First().Id;
            _repository.Add(room1);

            // Add the two users to the room
            _repository.AddUserRoom(user1, room1);
            _repository.AddUserRoom(user2, room1);

            // Try to get online users by room
            var onlineExpected = new List <ChatUser>()
            {
                user1
            };

            Assert.Equal(onlineExpected, _repository.GetOnlineUsers(room1).ToList());

            // Now, update user2 to be online and try to get all online users
            _repository.GetUserById("2").Status = 0;
            _repository.CommitChanges();
            onlineExpected.Add(user2);

            Assert.True(_repository.GetOnlineUsers().ToList().Contains(user1));

            Console.WriteLine("\tPersistedRepositoryTest.GetOnlineUsersByRoom: Complete");
        }