為什么MOQ框架會覆蓋所有虛擬方法-C＃

Question

我是C＃中的最小起訂量的新手。 這是我的代碼：

   public class CustomerBase
    {
        private List<Customer> customers = new List<Customer>();
        public const int MAX_CUSTOMERS = 100;

        public int CustomerCount()
        {
            return customers.Count();
        }

        public void AddCustomer(string name, string email)
        {
            if (CustomerCount() >= MAX_CUSTOMERS)
            {
                return;
            }
            Customer cus = new Customer(name);
            customers.Add(cus);
            SendEmail(email);
        }

        public virtual void SendEmail(string email)
        {
            throw new NotImplementedException();
        }
    }

    [TestClass]
    public class UnitTest1
    {
        [TestMethod]
        public void TestAddUser()
        {
            Mock<CustomerBase> m = new Mock<CustomerBase>();
            m.Setup(x => x.SendEmail("k")).Verifiable(); // bypass send email because email is server is not setup
            m.Object.AddCustomer("max", "k@g");
            Assert.AreEqual(1, m.Object.CustomerCount());
        }
  }

測試通過。 一旦將CustomerCount虛擬化，測試將失敗，因為該方法開始返回零。 有誰知道為什么以及如何防止這種行為？

---

更新的代碼-使用內部程序集失敗：

   [assembly: InternalsVisibleTo("UnitTestProject1")] // make the test assembly internal
namespace MoqSmple1
{
    public class CustomerBase
    {
        private List<Customer> customers = new List<Customer>();
        public const int MAX_CUSTOMERS = 100;

        internal virtual int CustomerCount()
        {
            return customers.Count();
        }

        public void AddCustomer(string name, string email)
        {
            if (CustomerCount() >= MAX_CUSTOMERS)
            {
                return;
            }
            Customer cus = new Customer(name);
            customers.Add(cus);
            SendEmail(email);
        }

        internal virtual void SendEmail(string email)
        {
            throw new NotImplementedException();
        }
    }
}

namespace UnitTestProject1
{
    [TestClass]
    public class UnitTest1
    {
        [TestMethod]
        public void TestAddUser()
        {
            Mock<CustomerBase> m = new Mock<CustomerBase>();
            m.Setup(x => x.SendEmail("k")).Verifiable(); // bypass send email because email is server is not setup
            m.Object.AddCustomer("max", "k@g");
            m.CallBase = true;// keep the default behaviour of virtual methods except the ones skipped
            Assert.AreEqual(1, m.Object.CustomerCount());
        }
    }
}

我發現的更新 ：

• 我需要一個公鑰
• 我需要將方法內部保護為虛擬

Answer 1

您想要設置<YourMock>.CallBase = true 。 這是關於CallBase的好文章

簡而言之，Moq將默認為所有虛擬方法創建代理，並且將CallBase設置為true會保留默認實現，除非您明確要求代理。