I’m kinda new to Unit testing and Moq, and I’m struggling to test the following code:

public void SendObject()
{
   /* Some operations */
   SendAsync(text)
}

private async Task SendAsync(string text)
{
   var sender = _senderCreator.CreateSender(_config.SomeValue)
   sender.SendMessageAsync(text)
   sender.CloseAsync()
}

My idea in general terms it’s verify that sender.CloseAsync() was executed but, so far, I haven’t been able to do it.
I tried mocking CreateSender and the sender method calls, but no luck.
Didn’t even expected it to work to be honest, but I had to try something.

_senderCreator.Setup(x => x.CreateSender(It.IsAny<string>())).Returns(new SenderInstance());

senderMock.Setup(x => x.SendMessageAsync(It.IsAny<string>(), It.IsAny<CancellationToken>()))
          .Returns(Task.CompletedTask);

senderMock.Setup(x => x.CloseAsync(It.IsAny<CancellationToken>())).Returns(Task.CompletedTask);

I suppose this needs a refactor, but I’m not able to do that so…

Any suggestions?