checking that a method was called with xunit & moq

TestMethodWasCalled.cs

using System;
using Xunit;
using Moq;

public class Program
{
    static void Main(string[] args)
    {
    }
    
    public interface IScratch
    {
        void ScratchMe();
    }
    
    public class Scratcher
    {
        private readonly IScratch _scratch;
    
        public Scratcher(IScratch scratch)
        {
            _scratch = scratch;
        }
    
        public void DoIt()
        {
            _scratch.ScratchMe();
        }
    }
    
    [Fact]
    public void TestMethodWasCalled()
    {
        var scratch = new Mock<IScratch>();
    
        var scratcher = new Scratcher(scratch.Object);
        scratcher.DoIt();
    
        scratch.Verify(x => x.ScratchMe(), Times.AtLeastOnce);
    }
}