public void deletechannel()
{
FakeChatService fakechat = new FakeChatService();
ChatController _chatcontroller = new ChatController(fakechat);
var result = _chatcontroller.DeleteChannelById("5b8932523f0c56095c70d82d");
var notePosted = result as NoContentResult;
Assert.Equal(204, notePosted.StatusCode);
}