Last week I needed a way to unit-test some code I was about to write that sent notification emails, and ran into SmtpMock. Nifty little bugger. Here's some sample code using it:

[Test]

public void CanSendMailSuccessfully()

{

   // set up mocks for config, windsor

   MockRepository mocks = CreateMocks();

   mocks.ReplayAll();

   // start mock SMTPServer

   SmtpMock smtpServer = new SmtpMock();

   smtpServer.Start();

   // call sender

   IMailSender sender = new MailSender();

   sender.SendReport(new Exception("ExceptionTest"));

   // check mock server

   mocks.VerifyAll();

   smtpServer.Stop();

   Assert.AreEqual(1, smtpServer.Sessions.Length);

}