JabbR.Services.ChatService.AddMessage C# (CSharp) Method

        public ChatMessage AddMessage(ChatUser user, ChatRoom room, string id, string content)
        {
            var chatMessage = new ChatMessage
            {
                Id = id,
                User = user,
                Content = content,
                When = DateTimeOffset.UtcNow,
                Room = room,
                HtmlEncoded = false
            };

            _repository.Add(chatMessage);

            return chatMessage;
        }

            public void AddsNewMessageToRepository()
            {
                var repository = new InMemoryRepository();
                var user = new ChatUser
                {
                    Name = "foo"
                };
                repository.Add(user);
                var room = new ChatRoom
                {
                    Name = "Room"
                };
                repository.Add(room);
                room.Users.Add(user);
                user.Rooms.Add(room);

                var service = new ChatService(repository);
                ChatMessage message = service.AddMessage(user, room, "Content");

                Assert.NotNull(message);
                Assert.Same(message, room.Messages.First());
                Assert.Equal("Content", message.Content);
            }