stubbing-tests.cs

using System;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using Moq;

[TestClass]
public class StubbingTests
{
    [TestMethod]
    public void should_build_a_greeting_based_on_age()
    {
        var stubMessageService = new Mock<IMessageService>();

        stubMessageService.Setup(ds => ds.GetMessageBasedOnAge(45)).Returns("Whazzup");

        GreetingBuilder2 sut = new GreetingBuilder2(stubMessageService.Object);

        string result = sut.Build("Joe", 45);

        Assert.AreEqual("Whazzup, Joe!", result);
    }
}