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[ASP.net教程]ASP.NET 系列:单元测试之SmtpClient


使用SmtpClient发送Email时,我们可以创建ISmtpClient接口和SmtpClientWrapper适配类,在单元测试中对ISmtpClient进行Mock或自定义FackeSmtpClient,但nDumbster的Facke SMTP Server给我们提供了更直观更简单的方式进行单元测试。可以通过Nuget搜索nDumbster,这里使用的是netDumbster。

1.IEmailSender接口

public interface IEmailSender{  void SendMail(string from, string to, string subject, string body);}

2.SMTPAdapter实现类

public interfacepublic class SMTPAdapter : IEmailSender{  public void SendMail(string from, string to, string subject, string body)  {    var message = new MailMessage();    message.IsBodyHtml = true;    message.From = new MailAddress(from);    message.To.Add(new MailAddress(to));    message.Subject = subject;    message.Body = body;    using (var smtpClient = new SmtpClient())    {      if (smtpClient.Host == null)      {        smtpClient.Host = "localhost";      }      smtpClient.Send(message);    }  }}

3.使用nDumbster单元测试

public class SMTPAdapterTest{  [Fact]  public void SendMailTest()  {    SimpleSmtpServer server = SimpleSmtpServer.Start(25);    IEmailSender sender = new SMTPAdapter();    sender.SendMail("sender@here.com", "receiver@there.com", "subject", "body");    Assert.Equal(1, server.ReceivedEmailCount);    SmtpMessage mail = (SmtpMessage)server.ReceivedEmail[0];    Assert.Equal("sender@here.com", mail.Headers["From"]);    Assert.Equal("receiver@there.com", mail.Headers["To"]);    Assert.Equal("subject", mail.Headers["Subject"]);    Assert.Equal("body", mail.MessageParts[0].BodyData);    server.Stop();  }}