MS Unit Testing with Mocking

MS Unit Testing with Mocking : Mock object which we unable to run and execute

Step : 1 Add 2 Class Library project "EmployeeLIB","NotificationLib" & UnitTestingproject

EmployeeLib:

namespace EmployeeLib
{
    public class Employee
    {
        public bool AddEmployee(SendMail.MyEmail mail)
        {
           
           return mail.SendMail();           
            /// Add database operation code

        }
    }
}

NotificationLib :
 
namespace NotificationLib
{
    public class MyEmails
    {
        public virtual bool SendMail()
        {
       
                MailMessage mail = new MailMessage();
                SmtpClient SmtpServer = new SmtpClient("smtp.krishna.com");

                mail.From = new MailAddress("your_email_address@krishna.com");
                mail.To.Add("to_address");
                mail.Subject = "Test Mail";
                mail.Body = "This is for testing SMTP mail from krishna domain";

                SmtpServer.Port = 587;
                SmtpServer.Credentials = new System.Net.NetworkCredential("username", "password");
                SmtpServer.EnableSsl = true;

                SmtpServer.Send(mail);
                return true;
          
        }
    }
}

Add unit test project and install Moq from nuget

namespace UnitTestEmployeeLib
{
    [TestClass]
    public class UnitTest1
    {
        [TestMethod]
        public void TestAddEmployee()
        {
            // object

            Mock<SendMail.MyEmails> obj = new Mock<SendMail.MyEmails>();

            // function need to moq

            obj.Setup(a => a.SendMail()).Returns(true);


            EmployeeLib.Employee objEmp = new EmployeeLib.Employee();

            bool result = objEmp.AddEmployee(obj.Object);

            Assert.AreEqual(result, true);
        }
    }
}