public void BuildPriority_PreparesCorrectDestination() { // Arrange var fromAddress = new MailAddress("*****@*****.**"); var toAddress = new MailAddress("*****@*****.**"); var anotherAddress = new MailAddress("*****@*****.**"); // Act var builder = new EmailDestinationBuilder(fromAddress, new[] { toAddress, anotherAddress }, ServerName); string result = builder.Priority(MailPriority.High).Build(); // Assert var expected = string.Format( "Type=Mail;From={0};To={1},{2};UseAttachment={3};SmtpServer={4};UseSsl=true;Port=465;Priority={5};UseAuthentication=false;", fromAddress.Address, toAddress.Address, anotherAddress.Address, "false", ServerName, MailPriority.High); Assert.Equal(expected, result); }