测试SMTP的替代品？

Question

我试图开发一个发送电子邮件的应用程序，而且我们的内部网络非常紧密，所以我无法使用我们的内部邮件服务器进行中继。

有没有人曾经使用类似no-ip.com的东西？还有其他的选择吗？

Answer 1

如果你只需要t O检查电子邮件被发送到正确的地址，并用正确的内容，最简单的方法是通过编辑应用程序或web.config文件中使用投递文件夹：

<system.net> 
    <mailSettings> 
     <smtp deliveryMethod="SpecifiedPickupDirectory" from="me@myorg.com"> 
     <specifiedPickupDirectory pickupDirectoryLocation="C:\TestMailDrop"/> 
     </smtp> 
    </mailSettings> 
    </system.net> 

这将导致电子邮件被创建为指定目录中的文件。您甚至可以加载这些文件并将其作为单元测试的一部分进行验证。

（如codekaizen指出，这也可以在代码中完成，如果你不介意修改代码/硬编码投递文件夹，并具有行为在调试/释放模式有所不同。）

Answer 2

通常的答案是在IIS下本地运行SMTP，但您需要注意发送给谁。实际上，发送到通常的SMTP服务器并仅定位到您的域中的帐户可能会更好。

Answer 3

我会同意上面的...设置您自己的测试SMTP服务器，并将其用于您的测试。

这里的一些信息，让你在正确的轨道上：

http://www.microsoft.com/technet/prodtechnol/WindowsServer2003/Library/IIS/e4cf06f5-9a36-474b-ba78-3f287a2b88f2.mspx?mfr=true

http://www.cmsconnect.com/praetor/WebHelpG2/Chapter_2_-_Pre-installation_considerations/Configuring_the_SMTP_Server.htm

http://service1.symantec.com/support/ent-gate.nsf/docid/2007241920754398

Answer 4

您可以将电子邮件保存到磁盘：

#if DEBUG 
smtpClient.PickupDirectoryLocation = "\\Path\\to\\save\\folder"; 
smtpClient.DeliveryMethod = SmtpDeliveryMethod.SpecifiedPickupDirectory; 
smtpClient.Send(msg); 
#endif 

Answer 5

从@ Riffing codekaizen，使用AutoFixture.xUnit [其可作为一个包的xUnit该名称]： -

[Theory, AutoData] 
    public static void ShouldSendWithCorrectValues(string anonymousFrom, string anonymousRecipients, string anonymousSubject, string anonymousBody) 
    { 
     anonymousFrom += "@b.com"; 
     anonymousRecipients += "@c.com"; 

     using (var tempDir = new TemporaryDirectoryFixture()) 
     { 
      var capturingSmtpClient = new CapturingSmtpClientFixture(tempDir.DirectoryPath); 
      var sut = new EmailSender(capturingSmtpClient.SmtpClient); 

      sut.Send(anonymousFrom, anonymousRecipients, anonymousSubject, anonymousBody); 
      string expectedSingleFilename = capturingSmtpClient.EnumeratePickedUpFiles().Single(); 
      var result = File.ReadAllText(expectedSingleFilename); 

      Assert.Contains("From: " + anonymousFrom, result); 
      Assert.Contains("To: " + anonymousRecipients, result); 
      Assert.Contains("Subject: " + anonymousSubject, result); 
      Assert.Contains(anonymousBody, result); 
     } 
    } 

CapturingSmtpClientFixture仅在试验中使用的上下文

class CapturingSmtpClientFixture 
    { 
     readonly string _path; 
     readonly SmtpClient _smtpClient; 

     public CapturingSmtpClientFixture(string path) 
     { 
      _path = path; 
      _smtpClient = new SmtpClient { DeliveryMethod = SmtpDeliveryMethod.SpecifiedPickupDirectory, PickupDirectoryLocation = _path }; 
     } 

     public SmtpClient SmtpClient 
     { 
      get { return _smtpClient; } 
     } 

     public IEnumerable<string> EnumeratePickedUpFiles() 
     { 
      return Directory.EnumerateFiles(_path); 
     } 
    } 

然后，您需要做的就是确保您的实际代码提供的SmtpClient已经与适用于实时SMTP服务器的参数连接起来。

（为了完整起见，这里是TemporaryDirectoryFixture）： -

public class TemporaryDirectoryFixture : IDisposable 
{ 
    readonly string _directoryPath; 

    public TemporaryDirectoryFixture() 
    { 
     string randomDirectoryName = Path.GetFileNameWithoutExtension(Path.GetRandomFileName()); 

     _directoryPath = Path.Combine(Path.GetTempPath(), randomDirectoryName); 

     Directory.CreateDirectory(DirectoryPath); 
    } 

    public string DirectoryPath 
    { 
     get { return _directoryPath; } 
    } 

    public void Dispose() 
    { 
     try 
     { 
      if (Directory.Exists(_directoryPath)) 
       Directory.Delete(_directoryPath, true); 
     } 
     catch (IOException) 
     { 
      // Give other process a chance to release their handles 
      // see http://stackoverflow.com/questions/329355/cannot-delete-directory-with-directory-deletepath-true/1703799#1703799 
      Thread.Sleep(0); 
      try 
      { 
       Directory.Delete(_directoryPath, true); 
      } 
      catch 
      { 
       var longDelayS = 2; 
       try 
       { 
        // This time we'll have to be _really_ patient 
        Thread.Sleep(TimeSpan.FromSeconds(longDelayS)); 
        Directory.Delete(_directoryPath, true); 
       } 
       catch (Exception ex) 
       { 
        throw new Exception(@"Could not delete " + GetType() + @" directory: """ + _directoryPath + @""" due to locking, even after " + longDelayS + " seconds", ex); 
       } 
      } 
     } 
    } 
} 

和骨架EmailSender：

public class EmailSender 
{ 
    readonly SmtpClient _smtpClient; 

    public EmailSender(SmtpClient smtpClient) 
    { 
     if (smtpClient == null) 
      throw new ArgumentNullException("smtpClient"); 

     _smtpClient = smtpClient; 
    } 

    public void Send(string from, string recipients, string subject, string body) 
    { 
     _smtpClient.Send(from, recipients, subject, body); 
    } 
}