gistfile1.txt

//第二版
    public class Target
    {
        public delegate int MyDelegate();

        private MyDelegate _myDelegate;
        public MyDelegate GetsMod
        {
            get
            {
                if (_myDelegate == null)
                {
                    _myDelegate = new DelegateSource().DelegateOne;
                }
                return _myDelegate;
            }
            set
            {
                _myDelegate = value;
            }
        }

        public int MyMethod(int original)
        {
            var mod = this.GetsMod();
            return original % mod;
        }
    }


    public class DelegateSource
    {

        public int DelegateOne()
        {
            var result = GetMyValue();
            return result;
        }

        private int GetMyValue()
        {
            return 2;
        }
    }

//測試
        /// <summary>
        ///MyMethod 的測試
        ///</summary>
        [TestMethod()]
        public void MyMethodTest()
        {
            Target target = new Target();
            int original = 3;
            int expected = 1;
            int actual;
            actual = target.MyMethod(original);
            Assert.AreEqual(expected, actual);
        }

        /// <summary>
        ///MyMethod 的測試
        ///</summary>
        [TestMethod()]
        public void MyMethodTest_2()
        {
            Target target = new Target();
            int original = 2;
            int expected = 0;
            int actual;
            actual = target.MyMethod(original);
            Assert.AreEqual(expected, actual);
        }


        /// <summary>
        ///MyMethod 的測試
        ///</summary>
        [TestMethod()]
        public void MyMethodTest_mockDelegate()
        {
            Target target = new Target() { GetsMod = () => { return 5; } };
            int original = 7;
            int expected = 2;
            int actual;
            actual = target.MyMethod(original);
            Assert.AreEqual(expected, actual);
        }